Rev. Biol. Trop., 30(2): 141 -150, 1982

New species of Euglossa IV. The corda ta and purpurea species groups ( : )

Robert L. Dressler Smithsonian Tropical Research Institute, Apdo. 2072, Balboa, Rep. of Panama.

(Received for publication March 18, 1982)

Abstraet: Six new species of the species group and six ofthe E. purpurea species groupare described. Each is compared withits closest allies. Previous papers in this series have treated Color: Ivory paraocular markings narro w, several species groups of Euglossa, sorne of incomplete below; forward side of antennal these now well enough known to permit keys scape black; front of clypeus blue aboye, for the identification of aH known species. The blue-green below and lateraJly, with black two, none too sharply differentiated, species median keel ; sides of clypeus and paraocular groups to be treated here, in contrast, inplude areas green with golden hues; upper fr ons dark many taxonomic problems. Each group in­ green; episternum, scutum, scutellum and upper cludes sorne of the commonest Euglossa species abdomen golden green; abdomen bronzy of Tropical America, and names are c1early beneath; hind tibia blue-green with golden hueso needed for sorneof these taxa. It is to be hoped that these descriptions and names wilJ facilitate Vestiture : Plumose hairs of thorax short, work with the euglossines of South America, as tawny, denser behind, dusky ab9ve; hairs on well as work on floral ecology in the area; bút I scutum dense, dusky. do not attempt comprehensive keys, and 1 will continue to treat a number of bees in these Punctation: On fr ont of clypeus small near groups as "close to species X" for the foresee­ keel and larger laterally; on episternum of able fu ture. medium size, interspaees smaJler than punetu res; on scutum va rying in size , dense; on A. The Euglossa cordata species group. This scuteJlum sparser, with sorne mieropunetures; group includes several very common species, E. on terga Il and III fine and very dense. cordata, of northern and eastern coastal South Tongue reaehing stemum Il; labrum America, E. tridentata and E. variabilis, both subquadrate, with median keel ; cJypeus with ranging from northern South America to strong median keel, irregular laterals; seutellum southern Mexico, and, among the species to be rounded subquadrate, less than half as long as described here, E. chlorina and E. gaianii of wide, without median depression, convex northern South America, and E. modestior of aboye; sternum 11 with small, widely separated the Amazon region. This grou p is characterized tufts ; mid tibia: posterior tuft small, by having the anterior mid-tibial tuft deeply subcireular; anterior tuft about 3 times length notched, with subequal lobes, or the lower lobe ofposterior, deeply notehed, with subequal and larger, and has the hind tibia rhomboid, but less symmetrical lobes ; hind tibia rhombic. strongly inflated than is usual in the purpurea group. Female : Similar to male, but fron t of l . Euglossa chlorina, new sp. clypeus golden green, punetation of tergum 11 decreasing in size behind, seutellum more Total length 10.3 mm ; head width 4.8 mm; rounded; scutellar tuft about half seutellar abdominal width 4 mm. length.

141 142 REVISTA DE BIOLOGIA TROPICAL

Holotype : Male,Caracas , Venezuela, 13 Sep. and paraocular areas bottle green; upper frons 1966. R.L. Dressler 563 (U.S.N.M.). Allotype dark green; episternum green with golden hues; female, Caracas, 5 Mar. 1967, Dressler 630 scutum dark green wi1h gdlden hues ; scutelIum (U.S.N.M.). Paratypes: 3 males of type series, golden green ; abdomen green with golden hues 12, 13 Sep. (Dressler coll.); 4 females of aboye, bronzy green beneath ; hind tibia dark allotype series, 4, 5 Mar. (Dressler coll. and to green. be distributed); 5 females, Santa Elena, Bolívar, 2Q.23 Feb. 1967, Dressler 616 (Dressler colI. Vestiture: Plumose hairs of thorax short, and to be distributed); 6 fe males, Río Chicanán, sparse, tawny, dusky aboye; hairs on scutum 26 Sep. 1966, Dressler 567 (Dressler coll. and short, dense, dusky. to be distributed); 2 males, :\ripo Valle y, Trinidad, 23 Aug. 1968, H.G. IDUs (Dressler Punctation: Dense and irregular on front of coll.); 1 male, Dawa, Tapakuma, Pomeroon, clypeus, coarser laterally; on episternum of Guyana, 30 Mar. 1970, N.H. Williams (Dressler medium size, interspaces as large as punctures; coll .) ; 3 males, Villavicencio , Colombia, 23 Jul. on scutum small, variable in size, dense , sparser 1968, H.G. Hills (Dressler coll.); 2 males, behind; on scutellum sparser, with Valparaiso, Caquetá, 7 June 1968, M.H. micropunctures ; on tergum 11 basally smalI and Robinson (Dressler coll.); 3 males, Río Porce, sparse, then fine and very dense, with Antioquia, 7 Apr. 1968, Dressler 915 (Dressler prominent smooth marginal band; on III coll .); 4 males, Palotal, Córdoba, 12 Apr. 1968, coarser and denser. G. Escobar (Dressler coll.). Tongue reaching stemum 11; labrum This is another rather ordinary green subquadrate , wider than long, with median Eug/ossa. The front of the clypeus is blue-green, keel; clypeus with median keel; scutelIum so that it may easily be confused either with rounded subquadrate, margin straight behind, those species having green clypeus or with those less than half as long as wide, with slight having dark blue cIypeus. The hind tibia is median depression, convex aboye; stemum 11 rather hatchet-shaped, and E. eh/orina, is with smalI, widely separated tufts ; mid tibia: probably closest to E. despecta, which has posterior tuft smalI, subcircular; anterior tuft blue-violet clypeus, markedly asyrnmetric about 3 times length of posterior, deeply " anterior mid-tibial tuft, and much sparsér notched, with subequal lobes ;' hind tibia punctation on tergum 11. TIte epithet means rhombic-oblong. yellow-green and refers to the golden hues typical of the species. Euglossa eh/orina has Female: Similar to male, but front of been observed visiting flowers of Catt/eya clypeus green, tergal punctation sparser; mossiae and brushing on the lip; it may be too scutelIar tuft about 215 scutellar length. smalI to be a pollinator of that orchi d, even if it enters the flower. The bees have been found Holotype : Male, 12 km SW Kourou , French feeding on Jaearandamimosaef olia and Guiana, 1 Dec. 1976, D. Roubik (U.S.N.M.). Staehytarph eta cayennensis, and the fe males AlIotype female, 12 km SW Kourou , 1 Mar. gather pollen of Sauvagesia and Melastomaceae. 1977, C.D. Michener (U .S.N.M.). Paratypes: 2 The males are attracted by cineole. Specimens males collected with type (Dressler coll.): 1 o f this species have been provisionally female , collected with allotype (Dressler coll.); identified as "RD 492". 7 males, 19 km SW Kourou, 22 Feb. 1977, C.D. Michener (Dressler coil and to be distributed); 2. Euglossa gaian ii, new sp. 1 female, Kourou, 16 Oct. 1976, C.D. Michener (Dressler coll;); 1 male , Balandra, Trinidad, 7 Total length 10 mm ; head width 4.5 mm; Aug. 1972, F .D. Bennett (Dressler coll.); 8 abdominal width 4.2 mm. males, Cuyaga, Aragua , Venezuela, 15 Nov. 1970, M. Gaiani (Dressler coll. and to be Color: Ivory paraocular markings narrow, distributed) ; 5 males, P. Nacional Guatopo, incomplete below ; forward si de of antennal Miranda, 700 m. , 27 July 1968, M. Gaiani scape with smalI brown spot ; front of cIypeus (Dressler coll. and to be distributed); 1 male, dark green with b'rowru sh keel; sides of cIypeus IP.E.A.N., Belém, Pará, , 27 Oct. 1968, DRESSLE'R: New species of Euglossa. IV. 143

Dressler 1203 (Dressler coll.); 2 males, Tongue reaching sternum 1; labrum Concei9ao da Barra, E.S., 15 Nov. 1968, subquadrate, wider than long, with median Dressler 1280a (Dressler coll.); 16 males. keel ; clypeus tricarinate; scutellum rounded Llullapichis, Rio Pachitea, Huánuco, Perú, 29 subquadrate, less than half as long as wi de , with Jan.- 15 Feb. 1975, Dressler 1612 (Dressler faint median depression, convex aboye; sternum coll. and to be distributed). 11 with small, widely separated tufts ; mid tibia: posterior tuft small, subcircular; anterior tuft This species is very similar toE. liopoda, but about three tiines length of posterior, deeply doesnot have the extremely shiny hind tibia of and obliquely notched, with the lower lobe that species, and differs in the form of the much larger, and upper very narrow; hind tibia anterior mid-tibial tuft. The name honors rhombic-oblong. Marco Paulo Gaiani, who assisted me in the field in 1966 and 1967. After Ileft Venezuela, Female : Unknown. when perfume baits were discovered, Marco went to great effo rt to sample bees in different Holotype: Male, Rio Chicanán, Bolívar, areas of Venezuela. His material of this species Venezuela, 26 Sep. 1966, R.L. Dressler 572 first showed me that it was distinct. Euglossa (U.SN.M.). Paratypes : 5 males of type series, gaianiihas been seen to brush on the spadix of 26, 27 Sep. (Dressler coll. and to be Spothiphyllu;;z kochii (cu1tivated), and has been distributed); 1 male, sarne locality, 26 Sep. collected with pollinaria of Catasetum, 1966, Dressler 567 (Dressler coll.); 1 male, Coryanthes, Cycnoches, Gongora and Peristeria. Valparaiso, Caquetá, Colombia, 7 Feb. 1964, This species has been collected feeding in M.H. Robinson (Dressler coll.); 1 male, flowers of Genipa americana, an d the fe males yarina cocha , Loreto, Peru, 28 Aug. 1972, E.W. gather pollen from Melastomaceae. The males Stiles (Dressler coll.); 1 male, Res. Ducke, have been collected at methyl salicylate, and Manaus, AM., Brazil, 18 Oct. 1968, Dressler are not attracted to other known perfume baits. 1152 (Dressler coll.); 3 males, I.P.E.A.N., Spe cimens o f this species have been Belém, Pará, 24-28 Oct. 1968, Dressler 1173 provisionally identifiedas "RD 548". (Dressler coll.); 1 male, Belém, 14 Dec. 1965, Dressler 429 (Dressler coll.); 1 male, Utinga, 3. Euglossa liopoda, new sp. Belém, 15 Dec. 1965, Dressler 43 1 (Dressler coll.). Total length 10 mm ; head width 4.3 mm; abdominal width 4 mm. The males of this species may be recognized by the very smooth, shiny hind tibia, to which Color: Ivory para ocular markings narrow, the epithet, liopoda, or ''smooth fo ot", refers. with small gap below; forward side of antennal Males have been found brushing on spadices of scape 1/2 ivory; front of clypeus green, with Anthurium cf. crystallinum and Spa thiphyllum brownish green keels; sides of clypeus and cannaefo lium, and one male from Belém bears a paraocular areas golden green; upper frons pollinarium of No ty lia. The bees have been green; episternum golden green; scutum, collected feeding on flowers of Sabicea aspera scutellum and abdomen green with golden hues; and S. velutina. The males have been collected hind tibia golden green, very shiny. at cineole, but never in large numbers. Specimens of this species have been Vestiture : Plumose hairs of thorax short, provisionally identifiedas "RD 43 1". sparse, tawny, dusky aboye; hairs on scutum short, dusky. 4. Euglossa modestior, new sp.

Punctation: Coarse and irregular on front of Total length � 1 mm; head width 4.7 mm ; clypeus; on episternum of medium size, abdominal width 4.2 mm. interspaces smaller than punctures; on scutum of medium size, dense, sparser behind; on Color: Ivory paraocular markings narrow but scutellum sparser, with micropunctures ; on complete ; fo rward side of antennal scape half terga 11 and III fine and very dense, with ivory; front of clypeus blue-green, with darker narrow smooth marginal bands. keels; sides of clypeus and paraocular areas 144 REVISTA DE BIOLOGIA TROPICAL bottle green; upper frons dark green; 6-7 June 1974, Dressler 1559 (Dressler coll. and episternum bottle green; scutum 3.Jld scutellum to be distributed); 4 males, Villavicencio, Meta, dark green with golden hues; abdomen dark 26 Nov. 1971, 1000 m, R.B. & M.G. Roberts bottle green aboye, golden green beneath; hind (Dressler coll.). tibia dark green with golden hueso This is a plain green bee without any Vestiture: Plumose hairs of thorax short, outstanding features, and the epithet, tawny, denser behind, dusky aboye; hairs of modestior, refers to its plainness. The scutum short, dense, dusky. combination of its drab coloration, the c1ypeus being neither elear green nor dark blue, and the Punctation: On front of c1ypeus of medium very narrow anterior mid-tibial tuft serve to size near keel, coarser laterally; on episternum distinguish this species from its allies. In the of medium size, interspaces about as large as Orinoco and the upper Amazon, E. modestior punctures ; on scutum variable in size, dense, seems to replace E. cordata as the common sparser behind ; on scutellum sparse, with green Euglossa, and may be more common in micropunctures ; on terga 11 and III fm e and urban habitats and degraded forests than in dense. undisturbed, wet forest. Males have been collected brushing on spadices of Tongue reaching sternum II; labrum Spathiphyllum cannaefoliu m, and have been subquadrate, wider than long, with median collected with pollinaria of Gongora and keel ; clypeus with median keel and irregular Mormodes (near Belém). Males are attracted to laterals; scutellum rounded subquadrate , margin cineole. Both sexes fe ed on Thevetia peruviana, straight behind, less than half as long as wide, and the females gather pollen from Sauvagesia with slight median depression, convex aboye; and Melastomaceae. Specimens of this species sternum II with small, widely separated tufts; have been provisionally identified as "RD 130". mid tibia: posterior tuft small, subcircular; anterior tuft very broadly notched, the 5. Euglossa platymera , new sp. mid-portion very narrow, each lobe about size of posterior tuft ; hind tibia rhombic. Total length 10.3 mm ; head width 4.5 mm; abdominal width 4.3 mm. Female: Similar to male, but scutum and scutellum more densely punctate and tergal Color: Ivory paraocular markings well punctation finer behind; seu tellar tuft about developed; forward side of antennal scape with 2/5 scutellar length. small ivory spot; front of elypeus dark blue, with black median keel; sides of clypeus and Holotype : Male, Iquitos, Loreto, Peru, paraocular areas golden green; upper frons dull 16 -18 Oct. 1964, R.L. Dressler 130 green; episternum golden green; scutum dull (U.S.N .M.). Allotype fe male, from type series bluish green, with golden hues behind; (U.S.N.M.). Paratypes: 1 male, 1 fe male, fr om scutellum green with golden hues ; abdomen type series (Dressler coll.); 3 males, Llullapichis, bronzy green aboye, bronze beneath; hind tibia Rio Pachitea, Huánuco, 29 Jan. - 9 Feb. 1975, golden green. Dressler 1613 (Dressler coll.); 2 males, 25 km S Riberalta, Beni, Bolivia, 22 Sep. 1972, D.L. Vestiture: Plumose hairs of thorax short, Pearson (Dressler coll.) ; 13 males, I.P .E.A.N., sparse, denser behind, tawny, dusky aboye; Belém, Pará, Brazil, 23-28 Oct. 1968, Dressler hairs on scutum of medium length, dusky, 1187 (Dressler coll. and to be distributed); 4 dense. males, Res. Ducke, Manaus, AM., 18-20 Oct. 1968, Dressler 1158 (Dressler coll.); 2 males, Punctation: Coarse, sparse and irregular on Zandery, Surinam, 3 Apr. 1968, C.H. Dodson front of c1ypeus; on episternum of me dium (Dressler coll.); 1 male, Puerto Ayacucho, size, the interspaces nearly as large as Amazonas, Venezuela, 27 Apr. 1967, Dressler punctures ; on scutum small and very dense; on 650 (Dressler coll.); 4 females, Puerto scutellum sparser but still dense; on terga II and Ayacucho, 27 Apr. 1967,Dressler 651 (Dressler III fm e and very dense, with narrow smooth coll.); 16 males, Leticia, Amazonas, Colombia, marginal bands. DRESSLER: New species of Euglossa. IV . 145

Tongue reaching stemum 11; labrum Vestiture : Plumose hairs of thorax short, subquadrate, wider than long, with median tawny, denser behind, dusky aboye; hairs on keel ; clypeus with strong median keel, irregular scutum short, dusky. laterals; scutellum rounded, somewhat 5-sided, with the postero-lateral edges straight, less than Punctation: On clypeus small near keel, half as long as wide , with slight median larger late rally, very irregular; on episternum of depression, convex aboye, with the median medium size, interspaces as large as punctures; part gibbous behind, the postero-lateral areas on scutum large and very dense; on scutellum flattened aboye ; sternum 11 with small, widely large and dense ; on terga 11 and III fine,ba sally separated tufts; mid tibia: posterior tuft small, sparse , denser behind, with narrow smooth subcircular; anterior tuft about three times marginal bands. length of posterior, deeply notched, the lower lobe larger than posterior tuft, the upper lo be Tongue reaching stemum 11; labrum very narrow; hind tibia trapezoid- rhombic. subquadrate, wider than long, with median keel; clypeus with irregular median keel; Female: Similar to male, but clypeus green, scutellum rounded subquadrate, less than half scutum and scutellum more densely punctate; as long as wide, without median depression, scutellar tuft narrow, about 2/5 scutellar convex aboye; sternum 11 with small and widely length. separated tufts; mid tibia: posterior tuft small, subcircular, anterior tuft about 3 times length Holotype: Male, Manaus, AM., Brazil, Mar. of posterior, deeply and obliquely notched, 1958, C. Elias (U.S.N.M.). Allotype fe male, with subequal lobes; hind tibia collected with the type (U.S.N.M.). Paratypes: trapezojd-rhom boi d. 2 males, 1 female, collected with type (Dressler coll.); 7 males, Mazaruni Potaro, Rockstone, Female: Unknown: Guyana, 9 Aug. 1970, N.H. Williams (Dressler coll. and to be distributed). Holotype: Male, Conceic¡:ao da Barra, E.S., This species is very distinctive in the fo rro of Brazil, 13 Nov. 1968, R.L. Dressler 1283 the scutellum, with both the rear rnargin and (U.SN.M .). Paratypes: 4 males of type serie�, the upper surface flattened postero-laterally, so 10-15 Nov. (Dressler coll.); 1 male, Conceic¡:ao that it is five-sided in outline. The epithet, da Barra, 14 Nov. 1968, Dressler 1302 (Dressler platymera, or "flat part", refers to this fe ature. coll.); 1 male, Res. Monte Pascoal, Bahia, 8 Males have been attracted to eugenol. Nov. 1968, Dressler 1264 (Dressler coll.); 2 Specimens of this species have been males, Itabuna, 3 June 1971, H. Kennedy provisionally identified as "BR 1". (Dressler coll.) ; 2 males, El Altar, Lara, Vene­ zuela, 19 May 1968, S. Tillett (Dressler coll.) ; 1 male, El Altar, 16 Aug. 1968, H.G. Hills 6. Euglossa securigera, new sp. (Dressler coll.); 1 m ale , Santa Elena, Bolívar, 23 Feb. 1967, Dressler623 (Dressler coll.); 1 male, Caracas, D.F., 13 Sep. 1966, Dressler 565 Total length 11 mm ; head width 4.9 mm; (Dressler coll.). abdominal width 4.3 mm .

Color: Ivory paraocular markings complete, The distinctive fe ature of this species is the but narrow; forward side of antennal scape with hatchet-shaped hind tibia; the epithet, very small ivory spot; fr ont of clypeus securigera, or "axe-bearer", refers to this blue-green ; sides of c1ypeus and paraocular feature. The distribution, from the Bahian area areas golden green; upper frons green; and Venezuela, without, as far as 1 know, any episternum green with sorne golden hues; material from the Amazon basin, is curious, but scutum green; scutellum green with sorne the material is quite uniformo Two of the golden hues; abdomen green with golden hues specimens from Espirito Santo bear pollinaria aboye, bronzy green beneath ; hind tibia of Coryanthes. The males have been attracted blue-green. to cine ole and eugenol. 146 REVISTA DE BIOLOGIA TROPICAL

B. The Euglossa purpurea species group : The 23-28 Oct. (Dressler coll. and to be very bronzy species of this group, with their distributed); 3 males, Res. Ducke, Manaus, greatest diversity in Costa Rica, are relatively AM., 20 Oct. 1968, Dressler 1172 (Dressler well known, but the Amazonian complex of coll.); 25 males, Llullapichis, Rio Pachitea, dark green bees has remained quite anonymous. Huánuco, Peru, 27 Jan. -11 Feb. 1975, Dressler The bees of this group are characterized by 1594 (Dressler coll. and to be distributed); 6 greatly inflated hind tibiae , by a tendency to males, Leticia, Amazonas, Colombi:l, 7 June gibbous scutellum and by the form of the 1974, Dressler 1558 (Dressler coll.); 7 males, anterior mid-tibial tuft, which is more easily Puerto Asis, Putumayo, 2 Feb. 1971, H. sketched than described (see figure 1, G-L). Kennedy (Dressler colI.).

7. Euglossa amazonica, new sp. This is perhaps the commonest small green Euglossa in the Amazon basin; thus the Total length 11 mm ; head width 4.5 mm; geographic epithet. Euglossa amazonica abdominal width 4.2 mm. resemble� both E. magnipes and E. mourei in the blue-violet c1ypeus and the greatly inflated Color: Ivqry paraocular markings well hind tibia, but the tibia is distinctly smaller developed ; forward side of antennal scape half than in these species, and E. amazonica differs ivory; fr ont of c1ypeus blue-violet, with black in the symmetrical anterior mid- tibial-tuft with keels ; sides of c1ypeus, para ocular areas and subequal lobes, and the tergal punctation is not episternum bottle green; upper frons dark as dense as in E. mourei nor as sparse as in E. green; scutum, scutellum and hind tibia dark magn ipes. Specimens from Belém bear green with golden hues; abdomen bottle green pollinaria of Coryanthes and Gongora, while with golden hu es aboye, golden green beneath. sorne of those from Peru bear pollinaria of Chaubardiella on the forelegs. The males are Vestiture : Plumose hairs of thorax short, attracted in numbers to cineole, eugenol and sparse, tawny, denser behind, dusky aboye; skatole, and occasionally to beta ionone, hairs on scutum short, dense, dusky. methyl salicylate, 2-phenylethyl acetate and vanillin. Specimens of this species have been Punctation: Coarse on fr ont of c1ypeus,. provisionally identifiedas "RD 1172. '�. sparser laterally; on episternum coarse, dense; on scutum coarse , variable in size, dense; on 8. Euglossa avicula, new sp . scutellum larger and sparser, with sorne micropunctures ; on tergum 11 basally small and Total length 10 mm ; head width 4.8 mm; sparse, dense medially and behind , with very abdominal width 4.6 mm. narrow smooth marginal band; coarser on III. Color: Ivory paraocular markings well Tongue reaching stemum V; labrum developed; forward side of antennal scape 2/5 subquadrate, wider than long, with median keel ivory; front of c1ypeus blue-green, dark blue and weak laterals; c1ypeus tricarinate ; scutellum aboye, with dark blue median keel; sides of subquadrate, margin straight behind, less than c1ypeus and paraocular areas golden green; half as long as wide , with weak median upper frons dark green; epistemum bronzy depression, convex above ; sternum 11 with green; scutum dark green with golden hues; small, widely separated tufts ; mid tibia: scutellum golden green; abdomen golden green posterior tuft oblong; upper lobe of anterior aboye, bronzy green beneath; hind tibia bronzy tuft dark, lower lobe shorter, pale, fo rming a green. broad angle with upper lobe; hind tibia oblong-rhomboid, inflated. Vestiture : Plumose hairs of thorax short, tawny, denser behind, dusky aboye; hairs of Female: Unknown. scutum medium long, dense, dusky.

Holotype : Male IP.E.A.N., Belém, Pará, Punctation: On front of clypeus coarse, Brazil, 24 Oct. 1968, R.L. Dressler 1181 irregular, coarser lateral1y ; on episternum of (U.S.N.M.). Paratypes : 68 males of type series, medium size, dense; on scutum medium DRESSLER: New species of Euglossa. IV. 147

large, dense; on scutellum larger,sparser, with scutum long, dense, mixed brown with sorne sorne micropunctures; on tergum 11 medium black. fine , dense, smalier behind, with narrow smooth marginal band; denser on 111. Punctation: On clypeus small near keel, coarser and irregular laterally; on epistemum Tongue reaching sternum 111; labrum me dium small, interspaces larger than subquadrate, wider than long, with median punctures; on scutum medium small, rather keel ; clypeus with strong median keel and dense, with sorne interspaces about as large as irregular laterals ; scutellum rounded punctures; on scutellum larger, with sorne subquadrate, less than half as long as wide, micropunctures ; on tergum 11 very fine and without median depre ssion, convex aboye; dense, with narrow smooth marginal band; Sternum 11 with smalI, widely separated tufts; coarser on 111. mid tibia: posterior tuft oblong, anterior tuft bilobed, the u pper lobe large, hemicircular, Tongue reaching stemum 11; labrum lower lobe much smalier, pal e; hind tibia subquadrate, wider than long, with median keel rhomboid . and weak laterals; clypeus with median keel ; scutelIum rounded subquadrate, nearly half as Female : Unknown. long as wide, without median depression, gibbous aboye behind; sternum 11 with smalI, Holotype: Male, Conceü¡:ao da Barra, E.S., widely separated tufts; mid tibia: posterior tuft Brazil, 11 Nov. 1968, R.L. Dressler 1284 shortly oblong; anterior tuft large, hemicircular, (U.S.N.M.). Paratypes: 5 males of type series, weakly n otched, paler in front; hind tibia 13-15 Nov. (Dressler coli.) ; 1 male, Conceiyao triangular-rhomboid. da Barra, 14 Nov. 1968, Dressler 1306 (Dressler colI .) ; 1 male, No. Linha res , 12 Nov. 1968, Female: Similar to male , terga 11 with wi der Dressler 1290 (Dressler coll.). smooth marginal band, scutelIum more gibbous; scutelIar tuft small, about 2/5 scutelIar length. This species is most closely allied to the widespread E. townsendi, and differs from that Holotype: Male, Santo Domingo, Pichincha, species in denser tergal punctation, squarer and Ecuador, 20 Aug. 1967, R.L; ' 'Dressler 711 flatter scutellum and in having the lower lobe (U.S.N.M.). AlIotype female, of type series

of the anterior mid-tibial tuft more (U.S.N .M.). Paratypes : 24 males, 23 fe males, conspicuous. With a Httle imagination, one may of type series (Dressler coli. and to be see the anterior tuft as the silhouette of a bird, distributed); 1 male , Quevedo, Los Rios, 3 the lower lobe being rhe head. The epithet, Apr. 1960, G. Frymire (Drcssler coll.); 1 avicula, refers to this outline. Males have male, Quevedo, 4 Apr. 1960, C. Játiva been collected at cineole and vanillin . (Dressler coll.).

9. Euglossa gibbosa, new sp. This species is aUied to E. townsendi and E. Total length 9.8 mm;head width 4.8 mm; heterosticta, and differs from these species in abdominal width 4.3 mm. the green male clypeus, in the finer scutal punctation, in the shaggier thorax and in the Color: Ivory paraocular markings welI more symmetrical anterior mid-tibial tuft. In developed ; forward side of antennal scape 1/2 the field both males and fe males are easily ivory; front of clypeus green with bronzy recognized by the gibbous scutellum, to which brown median keel; sides of clypeus, paraocular the epithet refers. This is perhaps the areas, upper frons, epistemum, scutum and commonest Euglossa on the Pacific slope of scutellum golden green ; abdomen dark green Ecuador. The type series, and many more, were with golden hues aboye, golden green beneath; colIected fe eding in flowers of Ip omoea. Sorne hind tibia bronzy green. of the males bear pollinaria of Gongora quinquenervis and Sievekingia rhonhofiae. 1 Vestiture: Plumose hairs of thorax medium believe that males of this species are attracted long, denser behind, brown tawny ; hairs of to cineole and perhaps other perfume baits, 148 REVISTA DE BIOLOGIA TROPICAL

though my material wa!¡ collected before the (Dressler coll.). Paratypes : 7 males of type perfume baits were in use. SpeciJr. ens of this series, 29 Jan. - 16 Feb. (Dressler coll. and to be species have been provisionally id,mtified as distributed); 1 male, from same nest as allotype "RD 711". (Dressler coll.) ; 1 male, Tarapoto, San Martin, H. Kennedy (Dressler coll.); 4 males, Museu 10. Euglossa magnipes, new sp. Goeldi, Belém, Pará, Brazil, 4-5 June 1964, Dressler 500 (Dressler coll.); 4 males, Rio Total length 11.7 mm; head width 5 mm; Cbicanán, Bolívar, Venezuela, 26, 27 Sep. abdominal width 4.4 mm. 1966, Dressler 571 (Dressler coll.); 1 male, Dawa, Tapakuma, Pomeroon, Guyana, 29 Mar. Color: Ivory paraocular markings well 1970; W. Evoy (Dressler coll.). developed ; forward side of antennal scape black; front of clypeus blue-violet with darker Tbis species is closely allied to E. mourei, keels; sides of clypeus and paráocular areas and differs from that species in the shorter bottle green ; upper frons blue.violet, tongue, in the coarser punctation of the episternum and scutellum golden gr en; sCutum � scutum, and in the larger lower lobe of the dark green with golden hues ; abdomen dark anterior mid·tibial tuft. Th e epithet, magnipes, green with golden hues aboye, golde n green refers to the greatly inflated bind tibia, One beneath; hind tibia golden green. may fm d minor differences in punctation between the different lots of bees 3$signed to Vestiture: Plumose hairs of thorax sparse, tbis species. 1 consider these to represent tawny, denser behind, du sky aboye; hairs of geograpbical variation, but, of course, future scutum short, mostly black. study of more aniple material- may give greater importance to th ese differences. Males have Punctation: On clypeus small·medium next been found brushing on spadices of Anthurium to keel, sparser and irregular laterally; on magnificum and Spathiphyllum cannaefolium; episternum me dium.large, dense; on scutum sorne males have been collected at vanillin and large, dense ; on scutellum sparser, with many 11 one at eugenol. Specimens of this species have rnicropunctures ; on tergum small and sparse, been provisionally identified as "RD 500". many interspaces larger than punctures , size of . - � 11 punctures decreasing behind; on coarser and 11. Euglossa mourei, new sr" denser. Total length 10.8 mm; head width 4.5 mm; Tongue reaching sternum III; labrum abdominal width 4 mm. subquadrate, wider than long, with median keel ; clypeus with strong median keel and Color: Ivory paraocular markings narrow, weaker laterals ; scutellum subquadrate, but complete; forward side of antenna,1 scape shallowly convex behind, less than half as long black; front of clypeus blu�.violet, with black as wide, with very faint median depression, 11 median keel and dark blue laterals; .sides of convex aboye; sternum with small, widely clypeus and paraocular areas bottl e green; separated tufts ; mid tibia: posterior tuft small, episternum a,rrd scutellum green with. golden oblong; anterior tuft notched, lower lobe larger hues; scutum dark green with golden hues, and fOrrning broad angle with upper ; hind tibia bluish in front ; abdomen dark green aboye, oblong-rhombic, inflated. golden green beneath;-hind tibia golden green.

Female : Similar to male, but clypeus and Vestiture: Plumose hairs of thorax sparse, frons green, scutum and scutellum more tawny, longer behind, du sky aboye; hairs on densely punctate, tergum 11 more finely scutum short, mostly black. punctate ; scutellum without tuft. Punctiltión: Coarse and irregular on front of Holotype: Male, Llullapichis, Río Pacbitea, clypeus; on epistemum medium large, sorne Huánuco, Peru, 15 Feb. 1975, R.L. Dressler interspaces as large as punctures; on sCutum 1610 (U. S.N.M.). Allotype female, Iquitos, variable in size, dense, with sorne interspaces as Loreto, emerged Feb. 1965, C.H. Dodson 104 large as punctures ; on scutellum sparser, with DRESSLER: New species of EuglosSll. IV. 149

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Fig. 1. Oiltlines of mid-titial tufts (above) and hind tibiae (below). AH drawn with camera lucida ; tufts at greater magnification than tibiae. (A) E. chlorina. (B) E. gaianii (C) E. liopoda. (D) E. modestior. (E) E. platymera. (F)E. securigera. (G) E. amazonica. (H) E. avicula. (1) E. gibbosa. (J) E. magnipes. (K) E. mourei. (L) E. pleosticta. many micropunctures; on tergum 11 basally and to be distributed); 3 males, Rio San Miguel" ftne, with a basal smooth area, medially of Napo, Ecuador, 4 Feb. 1971, H. Kennedy medium size and density, then decreasing in (Dressler coll.); 48 males, Uullapichis, Rio size to a wide smooth marginal band; denser on Pachitea, Huánuco, Peru,27 Jan.-9 Feb. 1975, 111. Dressler 1603 (Dressler coll. and to be distributed). Tongue subequal to body; labrum subquadrate, wider than long, with median This is one of the most abundant small keel ; clypeus tricarinate, median keel strongest; euglossas in the upper Amazon. It is closely scutellum subquadrate, shallowly convex allied to E. magnipes, as discussed under that behind, less than half as long as wide, with faint species. When F ather J .S. Moure ftrst tried to median depression, convex aboye; stemum n sort out the Brazilian species of Euglossa, he with small, widely separated tufts ; mid tibia: recognized this as a distinct taxon, and posterior tuft small, oblong; anterior tuft with provisionally treated it as "Moure no .2". The 2 lobes forming a broad angle, upper lobe epithet , maurei, is given to this species in narrow, dark, lower lobe pale; hind tibia recognition of Father Moure's contribution to oblong-rhomboid, inflated. our understanding of these bees, and in gratitude for the very great deal of help that he Female: Unknown. has given me. Iam sorry that other tasks have kept Father Moure away from the Holotype: Male, Leticia, Amazonas, during the last decade . While 1 dare not be Colombia, 6 June 1974, R.L. Dressler 1557 positive in associating males and females in this (U .S.N M.). Paratypes: 17 males of type series, difftcult complex, 1 feel sure that the female of 6, 7 June (Dressler coll. and to be distributed); this species is a bee without scutellar tuft and 26 males, Puerto Asis, Putumayo, 2 Feb. 1971, with strong, recurved bristles on the galea, this H. Kennedy (Dressler coll. and to be last probably forming a device for extracting distributed); 22 males, Macarena Field Sta., pollen from tubular flowers. Father Moure has Meta, 12 Jan. 1971, H. Kennedy (Dressler coll. assigned to these females a manuscript name 150 REVISTA DE BIOLOGIA TROPICAL

tbat alIudes to the spiny galea. Sorne male� of anteriortuft of two 10bes, forming an angle of tbis species from Leticia bore pollinaria of about 90°, upper lobe much larger and wider, Ca tasetum. The males have been collected lower 10be pale ; hind tibia oblong-rhomboid, especially with cineole and vanillin, with a fe w inflated. also attracted to skatole. As noted aboye, specimens of this species have been Female: Similar to male, but front of provisionally identifiedas "Moure no.2". clypeus green� and punctation of tergum 11 decreasing more in size behind; scutelIar tuft 12. Euglossa pleosticta, new sp. about 1/3 scutellar length,

Tota1 length 11 mm;head width 4.8 mm; Holotype: Male, No. Linhares, E.S., Bmzil, abdominal-width 4.2 mm. 12 Nov. 1968, R.L. Dressler 1297 (U.S.NM.). AlIotype female, same locality and date, Color: Ivory pamocular markings well Dressler 1300 (U.S.NM.). Paratypes : 1 male of developed; forward side of antennal scape 3/5 type series (Dressler coll.); 1 female of allotype ivory; fr ont of clypeus blue-green, with dark series (Dressler coD.); 8 males, Conceiyao da blue median keel; si des of clypeus and Barra, 10-15 Nov. 1968, Dressler 1278 (Dressler paraocular areas golden green;upper fr ons dark coD. and to be distributed); 3 males, Itabuna, green; epistemum golden green ; scutum and Bahia, 3-6 Nov. 1968, Dressler 1226 (Dressler scutellum green with golden hues; abdomen coll.); 2 males, 2 females, Represa Rio Grande, bronzy green aboye, bronze beneath;hind tibia GB., Oct. 1960 , F M. Oliveim (Dressler colI.); 1 bronzy green. female, Represa Río Grande, 23 Nov. 1968, Dressler(Dressler coll.). Vestiture : Plumose hairs of thorax short, tawny, denser behind, dusky aboye; bairs of In the form of the anterior mid-tibial tuft scutum short, mixed brown and black. this species resembles E. avicula and E. heterosticta, but it is at once distinguished from Punctation: On clypeus irregular, coarser these species by the greatly inflated hind tibia. late rally; on epistemum medium large, dense; The epithet pleosticta, or "many spots", refers on scutum medium large, very dense ; on to the very densely punctate scutum. Males, scutellum sparser, with sorne micropunctures; have been collected at cineole and vanillin, on tergum 11 medium large, dense medially, and the females were "exanlining the P unctures smaller both basalIy and distally, collector", indicating that this species with wide smooth marginal band; denser on 111. behaves much like the Central American E. ig niventris when it encounters an un familiar Tongue reaching stemum 11; labrum object in its habitat. subquadrate, wider than long, tricarinate; clypeus with definite median keel, weak RESUMEN laterals ; scutellum rounded subquadmte, shallowly convex behind, less than half as long Se describe seis especies nuevas en el grupo as wide, with faint median depression, convex Euglossa cordata y seis en el de E. purpurea. Se aboye; stemum 11 with small, widely sepamted compara cada una de ellas con sus aliados más tufts; mid tibia: posterior tuft smalI, oblong; cercanos.