HYMENOPTERA. 55 



segment laterally a patch of griseous pubescence ; the sides 

 have a scattered griseous pubescence ; beneath, the margins of 

 the segments piceous. 

 Hab. Sierra Leone. 



62. HALICTUS AURIFRONS, n. s. B.M. 



Male. Length 2 lines. Black, the face covered with a 

 golden pubescence, the flagellum fulvous beneath, mandibles 

 ferruginous at their apex, the clypeus not produced. Thorax, 

 above a thinly scattered golden-coloured pubescence, the post- 

 scutellum and sides of the metathorax covered with white pu- 

 bescence ; beneath, the pubescence is pale yellow ; the wings 

 hyaline, iridescent, the tegulae and nervures pale testaceous ; legs 

 rufo-piceous, the tarsi and knees pale ferruginous. Abdomen 

 ovate, nigro-piceous, on the apical margins of the three basal 

 segments laterally an angular patch of white pubescence. 

 Hab. Sierra Leone. 



63. HALICTUS PRODUCTUS, n. s. B.M. 



Male. Length 4 lines. Black, head and thorax closely and 

 moderately punctured, sides of the face covered with a downy 

 pale fulvous pubescence, the clypeus very much produced, ex- 

 tending beyond the eyes half their length, and having a number 

 of large punctures ; the antennae subclavate ; the front of the 

 thorax covered with a yellow downy pubescence ; wings subhya- 

 line, their apex fuscous, nervures pale ferruginous ; beneath, the 

 thorax has large scattered punctures, and is covered with an 

 ashy pile ; legs dark rufo-testaceous, the apical joints of the tarsi 

 ferruginous, their pubescence pale fulvous, the basal joint of the 

 tarsi beneath is bright fulvous. Abdomen' clavate, rufo-fuscous 

 towards the base, the apical margins of the segments pale testa- 

 ceous and having a silvery pubescence placed transversely, cross- 

 ing which are a few long pale hairs. 



Obs. The single specimen from which the above description 

 was drawn, differs from the typical neuration of the genus, but 

 possibly it may be merely a variety ; both the recurrent nervures 

 are received by the third submarginal cell. 

 Hab. Sierra Leone. 



64. HALICTUS CLAVATUS, n. s. B.M. 



Male. Length 2f lines. Head and thorax black, closely and 

 finely punctured, antennae fulvous beneath, the face covered with 

 a silvery white pubescence. Thorax, the wings hyaline, their 

 apex having a fuscous cloud, the tegulae and nervures rufo- 



