170 HYMENOPTERA. 



the anterior tarsi very pale testaceous, the three basal joints 

 broadly dilated, and having behind a pale thick fringe, which is 

 fulvous beneath ; the intermediate tarsi are also covered above 

 with long white pubescence ; the joints of the posterior tarsi are 

 very pale testaceous, and fuscous at their apex ; the claws ferru- 

 ginous, their tips black ; wings subfuscous, palest towards their 

 base ; the metathorax and first segment of the abdomen covered 

 with white pubescence, on the other segments it is short and 

 black ; the apex obtuse ; the apical margin of the sixth segment 

 emarginate. 

 Hab. New Holland. (Coll. J. S. Baly, Esq.) 



78. MEGACHILE OBTUSA, n. s. 



Male. Length 3J lines. Black, the head large, wider than 

 the thorax ; the face covered with bright yellow pubescence ; the 

 antennae rufo-testaceous beneath ; the cheeks, legs and thorax 

 beneath covered with long white pubescence ; on the disk and 

 on the sides of the metathorax it is pale yellow ; wings hyaline 

 and iridescent, faintly clouded at their apical margins, the ner- 

 vures black ; the anterior tarsi pale yellow testaceous, the basal 

 joint slightly dilated, and of the same width throughout; the 

 posterior margin thinly fringed with white pubescence, as are 

 also the intermediate tarsi behind ; all the tarsi beneath have a 

 bright yellow pubescence, the calcaria pale testaceous; claws 

 rufo-testaceous, black at their tips. Abdomen short, all the seg- 

 ments have a pale marginal fringe ; the apical segment covered 

 with bright yellow pubescence, its apex bidentate ; the lateral 

 angles acute. 

 Hab. Western Australia. (Coll. W. W. Saunders, Esq.) 



79. MEGACHILE CLYPEATA, n. s. 



Female. Length 3 lines. Black, closely and strongly punc- 

 tured, head subquadrate, on each side of the face a little griseous 

 pubescence, the anterior margin of the clypeus has on each side 

 a broad flattened tooth. Thorax, a little griseous pubescence on 

 the sides ; the wings hyaline and iridescent, the claws rufo-tes- 

 taceous. Abdomen, the basal margins of the segments depressed, 

 the apical margins on each side have a narrow white fringe, the 

 apical segment ferruginous ; beneath, the pollen-brush white. 

 Hab. Western Australia. (Coll. W. W. Saunders, Esq.) 



80. MEGACHILE MACULATA, n. s. B.M. 



Female. Length 5 lines. Black, the face thickly covered 

 with very pale ochraceous pubescence, nearly white at the mar- 



