HYMENOPTERA. 159 



46. MEGACHILE VENUSTA, n. s. B.M. 

 Female. Length 3| lines. Black, the sides of the face have 



a bright silvery-white pubescence, between the antennae and 

 above it is slightly fuscous ; the cheeks, legs and thorax have a 

 hoary pubescence, on the disk it is short, sparing and ochra- 

 ceous ; the wings hyaline, their nervures black ; all the tarsi 

 beneath fulvous, the calcaria pale testaceous, claws ferruginous. 

 Abdomen gradually tapering to the apex, the basal segment has 

 a little pale pubescence, the margins of the segments have a 

 narrow white fascia ; beneath, the pollen-brush is white towards 

 the base and fulvous towards the apex. 

 Hab. Port Natal ; Cape of Good Hope. 



47. MEGACHILE BASALIS, n. s. B.M. 

 Female. Length 5 lines. Head and thorax black, the face 



covered with white pubescence ; mandibles porrect, dark ferru- 

 ginous, deeply sculptured longitudinally, and having three teeth 

 at their apex ; the pubescence on the thorax and legs cinereous ; 

 legs dark ferruginous, the basal joint of the posterior tarsi broadly 

 dilated, all the tarsi fulvous beneath ; wings hyaline, their ner- 

 vures black. Abdomen red at the base, becoming gradually 

 darker to the apex ; the margins of the segments laterally have 

 a pale fascia ; the pollen-brush is of a bright golden yellow in- 

 clining to fulvous at the sides and towards the apex. 

 Hab. Port Natal. 



48. MEGACHILE PERPLEXA, n. s. 



Male. Length 4 i lines. Black, the face clothed with pale ful- 

 vous pubescence, as are also the cheeks and body beneath ; on the 

 vertex, and on the disk of the thorax it is black, and brown at the 

 sides of the metathorax ; the wings subhyaline, faintly clouded at 

 their apex ; the tarsi beneath clothed with fulvous pubescence, 

 the apical joints ferruginous, the anterior tarsi simple, the coxae 

 unarmed. Abdomen short and thickly clothed with bright ful- 

 vous pubescence; the sixth segment slightly produced in the 

 middle and notched at the apex ; beneath, the margins of the 

 segments testaceous. 



Obs. This is another of the species which closely resemble 

 the mystacea of Fabr., but the colour of the wings and pubes- 

 cence of the face at once distinguish it. 

 Hab. Port Natal. (Coll. W. W. Saunders, Esq.) 



49. MEGACHILE COMBUSTA, n. s. B.M. 

 Female. Length 10 lines, Black, the head and thorax strongly 



