28i Die Bienen Afrikas nach dem Stande unserer heutigen Kenntnisse. ,5c 



Bruststück oben sehr dicht und fein punktiert, mit einer mittleren glatten, schwach hervortretenden Kiel- 

 linie, welche sich vom Vorderrande bis ungefähr zur Mitte des Mittelrückens erstreckt. Bruststück seitlich und 

 unten grauzottig behaart. Abdomen oben glänzend und fein, mäßig dicht bis stellenweise zerstreut punktiert; 

 Bauchbürste vorn weißlich, hinten schön rötlichgelb. Das i. Fußglied der hintersten Beine kaum 

 so lang wie die 4 übrigen Fußglieder mitsammen. Beine schwarz, an der Spitze rötlich, deren Behaarung grau, 

 gegen die Spitze zu rödichbraun behaart. Flügel vollständig glashell, von der Seite gesehen, bräunlich glänzend. 



Equateur-Congo, Cap Van Gele (i Stück). 



? = venusta Sm., nur abgerieben! 



Mefj achtle senex Sm. 



1853 Megachile senex Smith, $, in: Catal. Hymen. Brit. Mus., Vol. I, p. 160. 



S. Black, face densely covered with long cinereous pubescence, very bright towards the apex of the 

 clypeus; the cheeks have a thick fringe of the same colour and a similar clothing is thinly scattered over the 

 entire insect; mandibles are longitudinally sculptured and have a long acute tooth at their apex. Thorax, the 

 pubescence on the disk slightly ochraceous; wings subhyaline, faintly clouded at their apex, nervures testaceous, 

 the apical joints of the tarsi rufo-testaceous, clothed beneath with bright fulvous pubescence; the anterior tarsi 

 simple, fringed behind with long white hairs ; the coxae armed with an obtuse spine, segment 6 rounded, recurved 

 and notched in the middle, each angle of the notch having a short acute spine, beyond which the margin is 

 crenulated, segment 7 has a stout spine in the centre of its margin. L. 5 lines (= 10V2 mm). 



Natal. 



Megachile niandibulata Sm. 



1853 Megachile mandibulata Smith, (£, in: Catal. Hymen Brit. Mus., Vol. I, p. 160. 



J. Black, face covered with long ochraceous pubescence, on the cheeks, thorax and abdomen beneath 

 it is griseous; mandibles very broad at their base and to half their length, when they are abruptly narrowed, 

 forming a sharp angle or tooth, their apex acute. Thorax, the pubescence on the disk pale ochraceous, thinly 

 scattered and intermixed with black hairs; wings hyaline, having a cloud at their apical margins, nervures fusco- 

 ferruginous; anterior tarsi simple, coxae armed with obtuse spines ; all the tarsi fulvous beneath, claws ferruginous, 

 their tips black. Abdomen shining and strongly punctured, margins of the segments laterally are fringed with 

 white pubescence, fringe becoming narrower within, that on the 5. segment sometimes entire, the apex armed 

 with 4 blunt teeth, 7. segment is acute as its apex, having a raised sharp carina down the centre, a simUar 

 carina also runs down the centre of the 6. segment. L. 5 lines (= loV-, nim). 



Natal, Gambia. 



Obs. This is probably the d of 31. angulata. 



Megachile frontalis Sm. 

 1863 Megachile frontalis Smith, <?, in: Catal. Hymen. Brit. Mus., Vol. I, p. 163. 



(J. Black, face densely clothed with silvery-white hair, on the Vertex and disk of the thorax it is pale 

 ochraceous, short and very sparing; on the sides of the thorax beneath and on the legs and head beneath, it is 

 white; wings hyaline, tegulae and nervures rufo-testaceous; extreme apex of the tibiae and apical joints of the 

 tarsi rufo-testaceous; anterior tarsi simple, coxae unarmed. Abdomen short, obtuse at the apex, apical segment 

 vertical, concave and covered with short white pubescence, its margin notched in the middle, on each side of 



