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Palpicorni A PARC NATIONAL ALBERT NATIONAAL ALBERT PARK I. MISSION G. F. DE WITTE 1933-1935 I. ZENDING G. F. DE WITTE 1933-1935 Fascicule 63 Aflevering 63 PALPICORNI A UY J. BALFOUR-BROWNE M. A. (London). The Palpicornia of the Albert National Park collected by the Mis¬ sion G. F. de Witte had been, in part, determined by the late M. A. d'Orchymont before his regretted death early in 1946. Shortly thereafter Dr. Van Straelen asked me to undertake the completion of the détermination of the de Witte collections and also those of the Mission H. Damas, and to prepare a report thereon. I wish here to express my sincere thanks to Dr. Van Straelen for the opportunity to study these very rich collections, hoth numerically and scientificallv, representing a total of OA^er 103 species, which furnish the richest single material 1 have yet seen from Africa. In those cases where d'Orchymont had assigned, in collection, a name to new species recognised by him in his preliminary study I have retained the name proposed bv him. Of the total of 103 named species dealt with hereinafter 22 species are described as new to science, four belonging to the Hydraenidse, one to the Hydrochinœ, fifteen to the Sphecridiinx and two to the Hydro- philinse. The high proportion of new species occuring in the Hydra>nida> emphasises that this family is still but very imperfectly known from Africa, tbe emphasis being the greater for the fact that only 20 specimens belonging to this group were obtained out of the very large total of the whole collection. Again, the fifteen new species of Sphxridiinx, out of a total of 44 species taken, compared with only two new species of Hydrophilinse, out of 48 species taken, suggests that the terrestrial forms of the Hydrophilidx are still relatively unknown whilst the truly aquatic forms from « normal » habitats are relatively well known; this, perhaps, is but a measure of the fact that previous collections have tended to ignore the smaller forms of the Sphœridiinœ from non-aquatic habitats. parc national albert Analysis of the vertical and horizontal distributions as detailed in the accompanying Tables, indicates that for the Palpicornia as a whole (Table 1) the nurnerical prépondérance of species occurs at the low inter- mediate zone (1.001 to 2.000 m), the next preferred zone being the lowest (0 to 1.000 m); contrarily only two species attain to the highest zone (3.001 to 4.000 m). This altitudinal preference holds true (Table 2), but without significant value, for the Hydrœnidse and for the subfamilies Hydrochinstt and Hydrophilirur. The Spercheidœ shew a décidée! preference for the lowest zone, no specimens occurring above 1.000 m. On the other hand the Sphœridiinœ, whilst shewing tne same maximum preference for the' low intermediate zone at 1.000 to 2.000 m, have their next highest pre¬ ference for the high intermediate zone (2.001 to 3.000 m) and are the only group to attain to the highest zone over 3.001 m. This différence in preference must undoubtedly be significant, having regard to the numerically rich material on which the opinion is based. Horizontally, as is to be expected, a greater number of species are seen to be common to the East African Highlands and to the Albert National Park than are common to the Park and to the relatively low- lving area of the Congo basin with altitudes rarely exceeding 600 m. Table 1. S P E C. 1 E S 0-1.000in. 1.001-2.000m. 2.001-3.000m. 3.001-4.000m. Congo.Belgian EastAfrica. Africa.West Hydrœnidœ. ! Ochthebius regimbarti Knisch X i — andreinii ? s. sp. Régimbart X ! il -+- II l 1 Hydrsena (s. str.) perlonga nov. sp. ... — atberti nov. sp X X M l 1 L'unnebius damasi sp. nov X X 1 + 1 — wittel sp. nov X II — 1 II I II SP X l|!x Spercheidœ. Spercheus cerisyi Guérin X 1 l — senegalensis Castelnau X 1 i + — 1 1 1 i humeralis Régimbart X 1 ++ +++ Hydrophilidœ. Hydrochus albicans Régimbart X — Il albertianus sp. nov X Cœlostoma phalacroides rubrocinctum Régimbart X X X — + + — mocquerysi d'Orchymont X ++ 1 — rufi tarse Boheman X X X + + H—I—h +++ XXX XXX III III III ^P «- cê C% ^ s :'l :c: es < 3 S e ? ce 95 S. Ö c ' ; ■ ■ 1 o : XXXXXXXX ^5 •2 X ce CO p £0 .2 2 W ll+llII œ c^ +++ Ill+l œ SCJ HH "c>i S I « I | X C < E- ce s C ce I 9. I | i 2'K 5ü àTS II Kl"*- S C II V. Ö I à P ö <" I II ^ o c/3 c ' I I I I P, > p C c I I " + X (S w $S Z ■< II £ z : I 1+ + I-II+IIl 3 ,1€€®88 s 53 g V. C 1 I I ^C'N'S XX ci ^ C £ th II I II | ». I +1II++ o .• I I | gO P X +1 O S ^ ^ Z I I I , >©.££ Si X S CAÎ 50 «y ce ö I II | III1 X F £ «* I | XIIXXX|XXXX|I||XX|X|XX|xIIxlX *î2 5 o Ö S 95 II I ! XXX So o P J- ^ zg z ZP Il I esi o o o z z es « h" I I : : • ■ II+II+++ I &. c/";' ' ■ '£11 ' X Il -S ^ H ce ce II ca C V» p ce p ce | I I te to c ce r-i te Z • | I . : I I XX ,û - »5> ce en P ' : I I | I . Il M : I | I M I IXXXX I + + I | lllll x Hiiî I II | I I 1+ + tjS: +1++++I++I++I+++I I Il I û x | I I + X w s I | I | I++I ' I I I | I ++ X s p II I :'I|| | (j • XX > Ö 5-i p I I II«o S5 I+++!++I ^ ri P Il I I XX <+ ëisi c/j t I I II + 'Si g c I X 02 K ZM II I | X 5? à III gV — ^ ;> . f I "'Sn c:? ÎH C g <> H S W II I | | X rw P ■< ca H J I | Il : ce I I I ! t-èn; IXXXXX Il I | < w' + + X î- < M I++1 +4-1 ./S « -è O I cc c II I I II . » i I I I 9 X Ii Il I i ! I I + i r/i . : • . • I | I I ?li ci a. x ^ "Ö cH QJ ^ > | I XX + 5-ë S, -a vw ce s S ce I I I I ■5 s 2 cn C 75 • I I I I 000>I00£ OOO'MOO'Z irmS|0g[ oooi-o Z-TOO'T ;stîa JSÖA\ "bomjV "B9UJV OOO m Cfl CL OâUOQ 'IK ik 'm PARC NATIONAL ALBERT ! . o tüd a 3 é té j o O v— o o o I SPECIES 2 o o o £ o có ro 1 < o .5 o TH ! t» o o <=> w o o % PO pq » ó h j 1 _ Helochares mersus d'Orchymont . ... X X + + — — stenius d'Orchymont _ X X 4 — — li.vian.us d'Orchymont X X + — — — collarti d'Orchymont ... X X 4 — minax d'Orchymont • X — + — — — rtimorphus d'Orchymont X -f 4 — — mentinotus Kuwert X — — H + — - — sp — X — — ■ — sp X — — — — — (C.) africanus d'Orchymont X — + — sp X — — — —— — — sp X — — — (s. str.) longipalpis Murray X X 4 4 4- — — — (s. str.) dilulus Erichson X X 4- -f 4- — — — — — -H (s. str.) ellipticus Régimbart . ... 4- — — — — (s. str.) pallens Mac I.eay X + 4 — — — — (s. str.) p. Ixviusculus Régimbart . X + — • — — — + + l'eltochares conspicuus Régimbart ... Enochrus (M.) natalensis Gemminger & Harold X X —— + + + — — — circumductus Régimbart XX + + — — — anticus Régimbart X X + 4- — — — — hesperidum Wollaston X X 4- — — — — — alberti sp. nov X Sternolophus solieri. Castelnau X X — — H + 4- — — angolensis Erichson X X X 4- + 4- X — — — + + 4- Hydrophilus senegalensis Percheron . — — — — aculeatus Solieh X X H + — Hydrochara elliptica Fabricius X X X — + + — X —— — Neohydrophilus straeleni sp. nov. ... — — — de XX t plana tus d'Orchymont _l — — — — distinctus Hope X H — — — — — wehnckei d'Oliveira X 4 — X X — — 4- . Amphiops phallicus d'Orchymont — — — — — — wittel d'Orchymont — — senegalensis Castei.nau X X X H 4- — — — — globus Erichson X H 4- — - Allocotocerus serlatus Régimbart . ... X X X + 4- — — — — — — semirotundus d'Orchymont + 4- — — — subseneus Erichson X X h 4 4- — X X X — - - Berosus (E.) cuspidatus Erichson ... + — — — — furcatus Boheman X X + — — — (s. str.) nigriceps Fabricius XX h 4- — — — _L — (s. str.) vitticollis Boheman X 1 — — — — — — (s. str.) nigropunctalus sp. nov. ... + — — Begimbartia elliptica. Régimbart X X — + h — nilotica Sharp X X p h 4- 1 1 I i Totals. 50 74 34 2 I 56 ; 71 33 1 nationaal albert park Table 2. cé ü S P E € I E S 0-1.000m. 1.001-2.000m. 2.001-3.000m. 3.001-4.000m. Congo.Belgian Africa.East t» Hydraenidae 3 5 i 0 0 3 0 Spercheidae 3 ö 0 0 2 3 1 Hydrophilidae Sphxridiina? 10 32 22 2 16 24 14 Hydrophilidae : Hydrochinœ h- Hydrophüinx 34 37 11 0 38 41 18 The Holotype specimen of all new species will be deposited in the « Institut Royal des Sciences Naturelles de Belgique » (Brussels), paratypes in the same institution and in the British Museum. The localities between [ ] are without the Park's houndaries. «s HYDR/ENID/E Subfam. H YDR/ENIN/E. Ochthebius (Homalochthebius) regimbarti Kniscii. Ochthebius (Homalochthebius) regimbarti Knisch 1924, Coleopt. Cat. Junk, 79, 18. Ochthebius rugulosus Régimbart 19C6, Ann. Soc. ent. France, 75, 276 (nec Wollaston 1857; nee J.
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