er Die Bienen Afrikas nach dem Stande unserer heutigen Kenntnisse. 137 



Chiyaka, Benguella, September ist, 1907; flying with Ceratina geigeriae at flowers of Geigeria spec. 

 (F. C. Wellman). 



General appearance like that of H. opacus Perez, but opacus has the mesothorax shining, with very 

 much larger and stronger punetures. H. geigeriae belongs to the group of H. quadrinotatus (Kirby) and 

 H. sexnotatus (Kirby) — a group characteristic of the Northern Hemisphere. 



Westafrika. 



Halictus haasi Vach. 

 1903 Halictus haasi Vachal, 9, in: Ann. Soc. ent. France, T. LXXII, p. 392. 



?. Ater, tarsi posteriores testaeei. Caput clypeo toto prolato suturis lateralibus tori modo inflatis. Meso- 

 notum dense punetatum. Segmenti medialis area dorsalis tota lunulata in medio postice marginata, scabra; area 

 analis circum marginata. Alae squalidae, nervo recurrente 1 fere ineidente; calcar 3 dentibus basali sat longa, 

 aliis brevibus obtusis. Pili capitis trunci et scopae subtus griseo-flavidi. 



Abdomen tenuissime et densissime punetulatum (forte maculis utrinque in segmentis 2 — 3). L. 8 mm. 



1 $ de Lukungu (Haas), Museum Bruxelles. 



Kongo. 



Halictus IieliopJiilus Cam. 

 1905 Halictus heliophilus Cambron, J, i n: "Reo. Albany Mus., Vol. I, p. 188. 



?. Black, the apices of the abdominal segments testaeeous, the knees, tibiae and tarsi ruf o-testaeeous ; the 

 4 front-tibiae broadly yellow in front, the fore tibiae behind in the middle and the hinder in the middle all round 

 black; the wings clear hyaline, the stigma and nervures pallid testaeeous. Flagellum of antennae brownish 

 beneath. The pubescence white. Tegulae testaceous-yellow. L. 7 mm. 



Clypeus shining, sparsely punetured; the front and vertex closely, uniformly and rather strongly punetured, 

 as are also the mesonotum and scutellum. Metanotal area closely reticulated except round the apex. Apex of 

 clypeus transverse, the sides projeeting into short blunt teeth, rounded at the apex. Third transverse cubital and 

 2nd recurrent nervures very pale, the former broadly curved outwardly; the 2nd abscissa of radius not much 

 longer than the ist, and clearly shorter than the 3rd. Anal rima pieeous; the segment at the sides rufous, the 

 hair also tinged with rufous. First abdominal segment minutely punetured. 



I am not sure but that this may be H. pallidipennis Sm.; but without an examination of the type it is 

 impossible to deeide this from the description. 



Kapland — Grahamstown. 



Halictus hoedillus Vach. 

 1903 Halictus hoedillus Vachal, <3, in: Ann. Soc. ent. France, T. LXXII, p. 392. 



d. Niger, clypei limbo apicali angulatim flavo; supra griseo-hispidulus, infra longe canescente barbatus, 

 segmentis ventralibus in lateribus tantum et fusco pilosis. Orbitae interne deorsum convergentes ; antennarum 

 articulus 4 aequans 2+3; mesonotum et scutellum bigibbulum opaca. Segmentum mediale lucidum, area dorsali 

 circa 16 rimis, angulis clinis, area anali margine circumdata. Alae griseo-hyalinae nervis pieeis. Tibia 3 tumidula. 

 Abdomen haud conspicue punetatum. L. 5Y2 mm - 



3 6 de N'Doro, Octobre 1898 (Bouyssou), coli. Vachal. 



Congo. 



