osMiA. 295 



base to the acute apex ; paraglossce very short, coadunate 

 at the base and acuminate at the apex; labial palpi more 

 than half the length of the tongue, the two first joints 

 membranous and long, the basal one the broadest, seated 

 on a petiole and not so long as the second, which tapers 

 to an acute point, before the apex of which the remain- 

 ing two short subclavate conterminous joints articulate; 

 labium about one-third the length of the tongue, acutely 

 produced in the centre of its inosculation ; maxilla as 

 long as the tongue, subhastate and acuminate; maxil- 

 lary palpi four-jointed, rather short, the joints subequal 

 and subclavate, but the second is both the most robust 

 and slightly the longest. Thorax oval or globose ; pro- _ 

 thorax inconspicuous; scutellum lunulate and convex; 

 post-scutellwm transverse and linear; the metathoraw ab- 

 ruptly truncated; wings with two submarginal cells, and a 

 third distinctly commenced, the second the longest, and 

 receiving both the recurrent nervures, the first towards 

 its centre and the second near its termination; legs 

 moderate, setose, the plantse of all with a dense brush 

 beneath; claw-joint longer than the three preceding; 

 claws simple. Abdomen short, cylindrical, convex, the 

 terminal segment slightly pointed, the ventral segments 

 densely pilose in parallel lines from the second. 



The MALE differs in having the antenna longer and 

 always filiform, the ventral segments very concave, and 

 the terminal dorsal segment variously mucronated, tu- 

 berculated, spinose or serrated, and the claws bifid. 



NATIVE SPECIES. 



1. leucomelana, Kirby, S $ . 3-4| lines. (Plate 



XIV. fig. 3 c? ? .) 



2. spinulosa, Kirby, $ ? . 3-4 lines. 



