HYMENOPTERA. 173 



third segment on each side ; the pollen-brush is of a very pale 

 yellow. 



Male. — In general appearance closely resembling the female ; 

 the clypeus is bearded with brilliant silvery-white pubescence, 

 the antennae capitate, the apical joint being compressed, the an- 

 terior femora in front, all the tibise in front, and the anterior 

 tarsi rufo-testaceous, the latter being very pale, broadly dilated, 

 and fringed with long pubescence, which is fulvous at its exterior 

 margin ; in the hollow of the dilated tarsus are two black dots ; 

 the anterior coxae are armed with two long obtuse spines, which, 

 at their base in front, have another short acute spine which curves 

 backwards ; the intermediate and posterior tarsi fringed beneath 

 with long pale hairs. Abdomen obtuse at the apex, the apical 

 segment having a broad depression or concavity, its margin being 

 simply emarginate and without teeth ; beneath, the margins of 

 the segments testaceous. 

 Hab. South Australia ; Adelaide. (The male in the Coll. of 



W. W. Saunders, Esq.) 



85. Megachile leucopyga, n. s. B.M. 



Female. Length 4^-5 lines. — Black, the face thinly covered 

 with griseous pubescence ; on the vertex and disk of the thorax 

 it is fuscous ; the mandibles stout, obliquely truncate and bideu- 

 tate at their apex ; the cheeks, thorax on the sides and beneath, 

 as well as the legs, thinly clothed with griseous pubescence ; the 

 wings fusco-hyaline, their nervures black ; the claws and calcaria 

 rufo-testaceous, the tarsi fulvous beneath. Abdomen elongate, 

 at the sides of the basal segment a little white pubescence, on 

 each side of the second and third segments a short fringe of 

 snow-white pubescence ; at the apex is an ovate patch of pale 

 pubescence, shghtly tinged with yellow, which extends to about 

 the middle of the fifth segment ; the pollen-brush very pale yel- 

 low, or nearly white. 

 Hab. Van Diemen's Land. 



86. Megachile chrysopyga, n. s. B.M. 



Female. Length 5-6 lines. — Black, the face as high as the 

 anterior stemma clothed with fulvous pubescence ; on the cheeks, 

 sides of the thorax and beneath is a thin clothing of white pu- 

 bescence ; the tarsi are fulvous beneath, the anterior and inter- 

 mediate pairs have a pale yellow pubescence above, the basal 

 joint of the posterior tarsi flattened and broadly dilated ; the en- 

 tire legs are roughly punctured, and covered otherwise with a 

 griseous pubescence; wings subhyaline, the nervures dark fer- 

 ruginous. Abdomen short and broad, the segments having each 



