16 ANDRENID^. 



STILPNOSOMA, Smith. 



Head as wide as the thorax, the vertex very convex ; the ocelli 

 in a curve ; the mentum more than twice the length of the labium ; 

 the labium broadly obtuse at the apex ; the paraglossce rounded at 

 their apex and as long as the labium ; the labial palpi 4-jointed, 

 the basal joint rather longer than the second, the third and fourth 

 of about equal length, the apical joint cylindrical, the joints short 

 and stout ; the maxillary pcdpi 6-jointed, the three basal ones stout 

 and of nearly the same length, the three apical ones much more 

 slender and clavate, the apical one pointed at the apex ; the man- 

 dibles bidentate. Thorax ovate ; the anterior wings with one mar- 

 ginal and two submarginal cells ; the marginal as long as the two 

 submarginals ; the first submarginal twice as long as the second, 

 which is subquadrate, slightly widened to the apex, and receiving 

 both the recurrent nervures, the first at its base, the second a little 

 before the apex. Abdomen ovate. The insect almost destitute of 

 pubescence. 



In this genus the neuration of the wings is nearly that of the 

 second division of Prosopis, but the large subglobose head and the 

 form of the labium distinguish it from that genus ; the tongue in 

 the genus Lioproctus is very similar, but that genus has three sub- 

 marginal cells in the anterior wings. 



1. Stilpnosoma laevigatum. 



Female. Length 5 lines. — Head and thorax bright green, the abdo- 

 men dark blue-green, highly polished, smooth, and shining. Head 

 with very fine scattered punctures ; the clypeus convex ; the fla- 

 gellum fulvous beneath, the apical joint entirely so. Thorax with 

 very fine scattered punctures above, beneath more closely and 

 strongly punctured ; the legs dark obscure blue or blue-green, 

 tinted more or less with obscure rufo-piceous ; the legs with a thin, 

 short, white pubescence, most dense on the tarsi, the apical joints 

 rufo-testaceous ; the posterior tibiae serrated at their base above, 

 the calcaria pale testaceous. Abdomen impunctate above, the 

 fourth and fifth segments with a few scattered shallow punctures ; 

 beneath punctured, with the margins of the segments impunctate, 

 smooth, and shining. 



Hab. Queensland. 



