6i Die Bienen Afrikas nach dem Stande unserer heutigen Kenntnisse. 143 



Halictus nudulus Vach. 

 1903 Halictus nudulus Vachal, JJ, in: Ann. Soc. ent. France, T. LXXII, p. 390. 



Je?- Ater, callo, tegulis, maxima parte pedum testaeeis. Pronotum et metanotum et fasciae basales 

 segmentorum 2 — 4 tomento griseo. Mesonotum nudum, fere laeve, lucidulum. Abdomen impunetatum lucidum, 

 segmento 1 fere nudo. Segmentum mediale ut in H. crocino sculptum. Alae sat hyalinae, nervis pieeis cellula 

 cubitali 2 areta nervum recurrentem angulum versus aeeipiente. 



$. Caput breviter ovale; annulus mandibularum et rima analis testacea. Prototarsus 3 saepius nigro 

 notatus. Calcar bitrispinosum spina basali longa. Scopa et femorum barba albidae. 



<?. Ore testaceo; venter fulvo-brunneo fimbriatus, fimbriae segmentorum 4 — 5 apice angulatim incisae. 



L. $ 6V2 — 7 mm, L. cf 6 mm. 



Plusieurs $ et plusieurs <J de Lastourville VIII.— IX. 1898 (BoUYSSOü), coli. Vachal. 



Kongo. 



Halictus pallidipennis Sm. 



1853 Halictus pallidipennis Smith, 5, in : Cat. Hym. Br. Mus., Vol. I, p. 52. 



$. Black, the face thinly covered with short griseous pubescence, the flagellum beneath pale fulvous, 

 tips of the mandibles ferruginous, disk of the thorax has similar pubescence to the face, the sides of the meta- 

 thorax clothed with rather long white pubescence, tegulae of a testaeeous yellow ; wings clear hyaline, nervures 

 very pale, the apical ones nearly obliterated, the tibiae and tarsi pale fulvous. Abdomen ovate, margins of the 

 segments broadly testaeeous, the basal segment of the abdomen smooth and shining, the rest densely covered 

 with short griseous pubescence. L. z\ lines (= 5V2 mm). 



Kap. Coli. Saunders. 



Halictus pearstonensis Cam. 

 1905 Halictus pearstonensis Cameron, 3, in: Tr. S.-Afr. Phil. Soc, Vol. XV, p. 237. 



cT. Black, shining ; the apex of the first and the greater part of the second, third, and fourth abdominal 

 segments rufous; the knees and tarsi fuscous; wings clear hyaline, the nervures and stigma black. L. 5 mm. 



Front, face, sides of clypeus and cheeks densely covered with long, white pubescence; the face closely 

 punetured, the clypeus much more strongly and sparsely punetured; the front and Vertex more closely and less 

 strongly punetured than the face. Pro- and mesonotum shining covered, but not thickly, with white pubescence ; 

 the postscutellum thickly covered with fuscous pubescence; the metanotal area finely, closely rugosely punetured, 

 the punetures running into reticulations on the sides. Pleurae opaque, alutaeeous, obscurely striated. Abdomen 

 smooth and shining; the base, apex, and ventral surface covered sparsely with long, white pubescence. The hair 

 on the legs is white, on the lower side of the tarsi pale golden. 



The apex of the metanotum has an oblique slope; the reddish 2 and 3 abdominal segments are almost 

 bare; the sternum thickly covered with long, white hair; the ventral segments are transverse at the apex; the 

 last is broadly, bluntly rounded at the apex with the sides slightly obliquely narrowed. 



Kapland — Pearston. 



Halictus postumus Vach. 

 1903 Halictus postumus Vachal, rf, in: Ann. Soc. ent. France, T. LXXII, p. 390. 



S- Nigro-piceus ; mandibularum apex, antennarum articulus 3, tegulae genua, tarsi et tibiae (his plus 

 minus fuscatis) testacea. Griseo-hispidus, in segmentis dorsali 7 et ventralibus 4 — 6 fusco. 



