HYMENOPTERA. 29 



scutellum, the teguLie and a broad epaulet over them, the tuber- 

 cles and legs, bright 3'ellovv ; the coxse and trochanters dark fer- 

 ruginous, the apical joints of the tarsi pale ferruginous. Ab- 

 domen red, having a black spot in the centre of the basal seg- 

 ment. 



Male. In general colouring agreeing with the other sex, but 

 has the face entii'ely yellow below the insertion of the antennjE ; 

 the epaulet narrow, the post-scutellum black. Abdomen having 

 only the two basal segments and a line down their centre black, 

 the posterior margin of the second black. 

 Hab. Adelaide. 



41. Prosopis RUFiCEPS, n. s. B.M. 



Female. Length 3 lines. — Head red, coarsely punctured, the 

 space between the clypeus and the eyes yellow, between the in- 

 sertion of the antennae and the stemmata black. Thorax black 

 shining, covered with deep punctures ; the collar slightly inter- 

 rupted, the tubercles and a lunate shape behind them, the 

 scutellum and post-scutellum yellow ; the metathorax truncate 

 behind ; the anterior tibite have a rufous stain in front, the claws 

 rufous. Abdomen of a metallic blue, in certain lights rufo- 

 piceous, delicately punctured. 

 Hab. Adelaide. 



42. Prosopis alcyonea. B.M. 

 Prosopis alcyonea, Erichs. Wiegm. Arch. (1842) p. 267- 241. 

 Hab. Van Diemen's Land. 



43. Prosopis vidua, n. s. B.M. 



Male. Length 5 lines. — Head and thorax black, the face on 

 each side of the clypeus below the insertion of the antennae 

 yellow, continued so upwards, gradually attenuating towards the 

 vertex of the eyes, not quite reaching it ; from the anterior stemma 

 a channel passes forwards towards the clypeus, in which is some- 

 times a minute yellow spot ; the clypeus on each side, as well as 

 the anterior margin, bordered with black ; a transverse yellow 

 line on the labrum ; the flagellum of the antennae testaceous be- 

 neath. Thorax strongly punctured, the tubercles yellow ; the 

 sides of the metathorax pubescent ; above, at the margin of the 

 post-scutellum, produced into a somewhat sharp shining angular 

 point ; the first recurrent nervure uniting with the apical nerve 

 of the first submargnial cell, the second recurrent nervure re- 

 ceived one-third from the apex of the second submargiual cell, 

 which is also one-third narrower at its radial than at its inferior 

 margin. Abdomen deep blue, having a scattered white pu- 



