Revision of Swedish Homalocephala Zetterstedt (Diptera, Otitidae) HUGO ANDERSSON
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Revision of Swedish Homalocephala Zetterstedt (Diptera, Otitidae) HUGO ANDERSSON Andersson, H.: Revision of Swedish Ilozalocephala Zetterstedt (Diptera, Otitidae). IRevision av de svenska artema av flugsliiktet Homalocephala Zetterstedt (Diptera, Otitidae).1 - Ent. Tidskr. 1 12:27-32. Ume6, Sweden 1991. ISSN 0013-886x. The Swedish species of Honalocephala Zetterstedt, 1838, are revised. Psairoptera_biumbrata Wahlberg, 1838, is designated as type species of Psairoptera Wahlberg, 1838, a junior synonym of Homalocephala. Lectotypes are designated for Homalocephala albitarsis Zet- t6rstedt, 1838, Psairoptera bimaculata Wahlberg, 1838, Psairoptera biumbrata Wahlberg, 1838, Psairoptera apiialis Wahlberg, 1838, and Psairoptera angustata Wahlberg, 1838. Both H.albitarsis-andH.biumbrataaredistinct,validspecies. PsairopterabipunctataLoew, 1854, is a junior synonym of Homalocephala albitarsis Zetterstedt, 1838 (syn. n.)' The Swedish distributions of and a key to the species are presented. H. Andersson, Swedish Mus. Nat. Hist., clo Dept. Syst. Zool., Helgonavtigen 3, 5-223 62 Lund, Sweden. Homalocephala Zetterstedt is currently placed in Homalocephala Zetterstedt subfamily Euxestinae of family Ulidiidae (Zaitzev Homalocephala Zetterstedt, 1837 (nomen nudum); 1984) or preferably in subfamily Ulidiinae of Zetterstedt, 1838 (type species: H. albitarsis Zetterstedt, family Otitidae (Steyskal 1987). 1838, by monotypy). (type The flies of Homalocephala are not common. PsairopteraWahlberg, 1838 species: P. biumbrata Wahlberg, 1838, by present designation). Their distribution is concentrated to Fennoscandia and NW USSR. Two species have a wider Euro- Key to Fennoscandian species pean distribution and three of the six Fennoscan- species are Holarctic. dian 1 . One pair of scutellar bristles (sc) . f1. biseta (Frey) Psairoptera Wahlberg is currently listed as a - Twopairsofsc..... .........2 junior synonym of Homalocephala (Zaitzev 2. Halteres black. Third antennal segment distinctly predominantly black. Wing 1984). Zetterstedt (1847) designated Homaloce- longer than broad. Legs as in Fig. 7 .... ..H. apicalis (Wahlb.) type species of phala albitarsis Zetterstedt as - Halteres white. Third antennal segment rounded, Psairoptera. This type designation is invalid as aboutaslongasbroad .........3 this species was not included in the original desc- 3. l,egs completely yellowish red. Wing as in Fig. 8 H bimaculln (wahlb) ription of P sairoptera. - rrg, uiu"t. Zetterstedt's Insecta Lapponica was published 4. Face andjowls"*t ^i".rv dark. Frons narrow (Figs 5,6). Abdo- in five fascicles and Homalocephala was descri- men narrow with few short bristles. The apical wing bed in Fascicle IV, published in 1838 (Persson, spot niurow, reaching vein Cu1 (Fig. 9) . in litt.). Wahlberg had, according to the introduc- - Face *i:"*r, i" rroni *rr,"1ef#J'Jff.tE#t, tion of his paper, published as pre-print in 1838, 3). Abdomen broader and with numerous, stouter not seen Fascicle IV of Insecta Lapponica before bristles.. ......5 describing Psairoptera. Dr Persson works on the 5. Basal wing spot restricted to wing field between veins problem whether Fascicle IV or the pre-print was Sc and Ry. Apical wing spot small, rounded, not reaching R+*s Gig. l0). Scutellum and ovipositor published first. Until this problem is solved, the sheath (Tz+Sr) pruinose, covered by microchaetae. valid name of the genus is Homalocephala ac- Apical part of surstyli directed outwards (Fig. cording to common use. l2). ........H. albitarsisZ.ett. 28 Hugo Andersson ヽ 彼 Ч ヽ / ヽ ク/ ヽ ル l ヽ ノ ー L 4 ′ Figs 1 6.〃 ο″α′οε 力α′α,head,lateral(1,4,5),front(2),and dOrsal(3,6)view -1-3 〃 α′♭′′αrsノ s Zett.-4.〃 わル わ″た (Wahlb)-5“`′ 〃 α″gン s″ ′α(Wahlb.). “ Revision of Swedish Homalocephala 29 Basal wing spot usually extended as brownish area covering anteiror transverse vein (t"). Apical wing spot larger and passing vein &*s Gig. 11). Scutellum o:':'and ovipositor sheath shining, without microchaetae. l* :1 ::"11i ^fiiTfi^olXiii*liiir Homalocephala albitarsis Zetterstedt Homalocephala albitarsis Zenerstedt, 1838:.7 49. Psairoptera bipunctata l.oew, 1854:.22, syn. n. Homalocephala bipunctata Loew: Ringdahl I93 1-195 1 Zenerstedt 1838: To, N; 1847 p. p.: T. Wahlgren 1919 p. p.: Lpl. Ringdahl 1948: Nb (as bipunctata Loew); 1931, 1951: To. Abisko, Jebrenjok.k (as bipunctata Loew). Both sexes were described from Norway, Dovre, leg. Boheman and from Sweden, Tome lappmark, Jukkasjiirvi. The Swedish specimens were bred from puparia found in rotting bark of Pinus. No syntype from Dovre is present in coll. Zetterstedt or coll. Boheman. The bred material from Jukkas- jiirvi is represented in coll. Zetterstedt in Lund by 3d39 and eight empty puparia. All the imagines are teneral and practically without dark spots on the wings but with pruinosity on the scutells and the seventh female tergites. The top specimen on a pin with two males and one empty puparium and label- led "H. albitarsis ins L. d. Psair. 2 umbrata Wbg. Juckasj" in Zetterstedt's handwriting is here desig- nated as the lectotype of H. albitarsis Zntt. The tip of the abdomen of the lectotype specimen has been detached and the genitalia relaxed. The removed aMominal parts have been mounted on the pin in glycerol in a plastic tubing. The other 2d39 are designated as paralectotypes. All studied type speci- mens are conspecific. The name is valid in the bino- men H omaloc ephala albitar sli Zetterstedt, I 838. In 1854, Loew described the new species Psai- roptera bipunctata ftom Poland giving the restricted dark area at Sc as the only differential character Figs 7-1 l. Homalocephala, wing. -7. H. apicalis from "albitarsis 7.ett." (= the true biumbrata (Wahlb.). -8. H. bimaculara (Wahlb.). -9. H. angustata Wahlb.), i.e. the description of bipunctata l-oew (Wahlb.). - 10. H. albitarsis Zett. - ll. H. biumbrata (wahlb.). agrees with the true albitarsis Zatt. All following authors have applied the name bipunctata Loew in that sense and Ps. bipunctata Loew. 1854, surely is ajunior synonym of H. albitarsisZntt. Vb: SkellefteAtrakten, 17.1956, I d, Ringdahl. Nb: Pi- tel,4.7.1947,29, Ringdahl; LuleA, 14.7.1919. -ld, Ring- datrl. To: Jukkasjiirvi, 3 d 3 9, Zetterstedt (lectotype and Studied material. Sweden. Sm: Hyltebruk, 28.6- paralectotypes).- 8.7.1986, 99, 13-19.7.1986, 19, t6-23.7.1987, t9,7- 15-23.6.1988, 2329.6.1988, 15.6.1988, 1d19, ld, Distribution. Known from GB, DDR, N, P, S, SF 5d19, Malaisetrap, P. & J. Ard6. Og: Gusum, ld, - and the norhwest part of European USSR. Also Wahlberg. - Vg: Tcireboda, Sisjrin, 12.6.1953, 19, S. Gauniz. - Vr: Munkfon, 1.8.1951. 19, Ringdahl. - reported from North America. 30 Hugo Andersson 〆 。 ‘ o 3 ・ 琢 ´ ゞ ヽ / Figs 12-13.〃ο″α′οε 力αた,surstyli,posteHor view,and ventral cpandrial plate,intemal view -12 〃 α′bj′αrsJs Zett-13〃 bル″b″`′ra(Wahlb.). Biology. Bred from rotten bark of Pinus (Zetterstedt Distribution. Known from S, SF, and the northwest 1838) and from Douglas fr stamp (Cogan & Dear part of European USSR. 1974). Biology. Unknown. H omalocephala biumbrata (Wahlberg) H omaloc ephala bimaculata (Wahlberg) P sairoptera biumbrata Wahlberg, 1838:2 l. P sairoptera bimaculata Wahlberg, 1838:20. Homalocephala albitarsis auctt. nec Zetterstedt, 1 838:749. Wahlberg 1838: Og, Gusum. Zenerstedt 1847: Jii, Fax- Wahlberg 1.838: Og, Up, Jii. Zenerstedt 1847: Og. Vg. Ja, tilven and Siiter. Watrlgren l9l9: Og. Ja. Faxiilven; Ostersund, Villam sdter (x albitarsis Zntt.). The female was described from material taken ra- Wahlgren l9l9: Og - Lpl (incl. albitarsisZrtt.). Ringdahl 1935: Sk; 1948: Sk, Sm, Jii; 1951: ld (as albitarsis 7ntt.). rely in Sweden, Ostergcitland, Gusum. In coll. Wahlberg in Swedish Museum of Natural History, Both sexes were described from material from Swe- Stockhohn, there are 4d I I I, labelled with a small, den, Uppland, Stockholm, Haga, leg. Boheman, light green rhombic tag indicating the coastal area from Osterg<itland, Gusum, leg. Wahlberg and from of Ostergcitland where Gusum is situated arrd 26 Jiimtland, leg. Boheman. tn coll. Wahlberg there are I 9, labelled "O. G." and "P. Wg." indicating that 7d169 from Gusum (labelled with light green the material was collected by Wahlberg in Ostergdt- rhombic tags meaning collected in the coastal area land. In coll. Boheman in the same museum there of Ostergritland) and in coll. Boheman under the are 8d59, labelled "O. G." and "P. Wg." and in nane albitarsis Zntt. l9 with one puparium from coll. Roth in Lund ld29 with the same labelling. Uppland, the coastal area (gilt rhombic tag). This It is now impossible to identify the type series specimen could belong to the material from Haga among this material. Anyhow, I have selected one bred by Boheman. ln coll. Zntterstedt there are un- of the females in coll. Wahlberg as the lectotype der the nwne albitarsis Zntt.6d69 (labelled: "O. and labelled it so. The name is valid in the binomen G." and "P.Wg.") one bred female with puparium H omalocephala bimaculata (Wahlberg, I 838). from Jiimtland (white and blue tags), leg. Boheman and 26 I 9 from Gusum, leg. Wahlberg. [n coll. Studied material. Sweden. Sm: Bolmen, 6.1,1957,16, Roth there arc 1629 from Gusum, leg. Watrlberg, 20.8.1957, I 9. Ringdairl. Og: Gusum, 15 d I 9 9. Waht- and in coll. Wallengren in Lund from Gusum, berg. Up: Rimbo 25.3.1971,- 1d I 9, Hedquist. Jii: l9 Faxiilven,- 9.8.1840, I d; Siiter at Krokumsiilven,- leg. Wahlberg. I have designated as the lectotype a 10.8.1840, I 9, Zetterstedt. male with green tag in coll. Wahlberg and restricted Revision of Swedish Homalocephala 3l the type locality to Sweden, Ostergdtland, Gusum. The female was described from a single specimen The name is valid in the binomen Homalocephala collected in Sweden, Ostergcitland, Gusum in 1837. biumbrata (Wahlberg, 1 838). In coll. Wahlberg there are 10d79 from Gusum Studied material. Sweden. Sf,: I 9. Boheman: Arkelstorp. (light green rhombic tag); in coll.