HYMENOPTERA. 161 



neath it is griseous ; the 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, the nervures fusco-ferruginous ; the anterior tarsi 

 simple, the coxae armed with obtuse spines ; all the tarsi fulvous 

 beneath, the claws ferruginous, their tips black. Abdomen 

 shining and strongly punctured, the margins of the segments 

 laterally are fringed with white pubescence, the fringe becoming 

 narrower within, that on the fifth segment sometimes entire, the 

 apex armed with four blunt teeth ; the seventh segment is acute 

 at its apex, having a raised sharp carina down the centre, a simi- 

 lar carina also runs down the centre of the sixth segment. 



Obs. This is probably the male of M. angularis. 

 Hab. Port Natal; the Gambia. 



53. MEGACHILE CCELOCERA. B.M. 



Male. Length 8 lines. Black, the face covered with pale 

 golden pubescence, the centre of the clypeus naked, shining and 

 punctured, the cheeks fringed with long white pubescence ; the 

 antennae subclavate, longitudinally grooved beneath. Thorax, 

 the metathorax densely covered with sooty-black pubescence, 

 that on the legs is short and black ; the anterior tarsi dilated, the 

 first joint broad at the base, much narrowed at the apex, its 

 posterior margin rounded, the following joints gradually decrea- 

 sing in width and somewhat heart-shaped, the whole fringed 

 behind with ferruginous pubescence; the coxae armed with a 

 stout tooth ; the wings dark fuscous, palest at their apical mar- 

 gins, and having a purple tinge. Abdomen bright fulvous, the 

 basal segment being clothed with black pubescence ; the apical 

 segment armed with two incurving obtuse teeth, and also a short 

 acute one at the extreme lateral margins. 

 Hab. Port Natal. 



54. MEGACHILE TARSATA. 



Anthidium tarsatum, Fabr. Syst. Piez. p. 365. 2. 

 Hab. Guinea. 



55. MEGACHILE CINCTA. B.M. 



Apis cincta, Fabr. Ent. Syst. ii. 338. 102. 

 Centris cincta, Fabr. Syst. Piez. p. 358. 17. 

 Hab. Sierra Leone. 



