2S HYMENOPTERA, 



bright yellow ; the labium iiiid soa])C' in front yellow ; the man- 

 dibles tciTUtriuoiis ; aiitennu! fulvous. Thorax, the colliir on 

 each side, the tuljereles and a patch l)ehiiid uniting, the tegulae 

 in front, the scutelluin and post-seutellum, the anterior femora 

 at their base beneath the tibijc and tarsi, yellow ; the tibia; have 

 a ferruginous stain behind ; the intermediate and posterior tarsi 

 ferruginous ; the scutellum is sculjitured with large shallow punc- 

 tures. Abdomen purjile or deep blue, closely and tinelv punc- 

 tured ; the margins of the segments sometimes rufo-piceous, as 

 well as the abdomen beneath. 



Hab. Adelaide. (Coll. J. S. Baly, Esq.) 



38. Prosoi'IS quadrata, n. s. 



Male. Length 3 lines. — Black, face below the antennae 

 yellow, the antennae luteous beneath. Thorax as well as the 

 head ver\- closely and finely punctured ; the tubercles, scutellum 

 and post- scutellum forming a quadrate j)atch, yellow ; below 

 which is an enclosed space, IjcautifuUy and delicately reticiUated ; 

 wings, hyaline, splendidly iridescent; the anterior and interme- 

 diate tibia in front, as well as the tarsi of the former, pale fer- 

 ruginous. Abdomen elongate-ovate, closely punctm-ed ; the 

 maigins of the two basal segments constricted. 

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



39. PrOSOPIS BIDEXTATA, n. s. 



Male. Length 3i lines. — Black, face below the insertion of 

 the antennae, and a narrow line between not reaching the anterior 

 stemma, a hne along the margin of the eyes, as well as a hne 

 behind them, yellow. Thorax opake ; the collar, tubercles, the 

 knees of the anterior and intermediate legs, as well as the basal 

 half of the posterior tibia, pale yellow ; anterior tibiae and basal 

 joint of the tarsi ferruginous ; wings hyaline, the two recurrent 

 nervures uniting with the r.enures of the second submarginal 

 cell. Abdomen punctate, shining ; beneath, the third segment 

 is produced into a transverse elevated ridge, having a stout tooth 

 at each extremity. 



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



40. Prosopis elegaxs, n. s. B.M. 



Female. Length 34 lines. — Head and thorax black ; the face 

 with three broad yellow stripes, terminating in a line \rith the 

 anterior stemma ; the labrum yellow, the mandibles ferruginous ; 

 antennae fusco-ferruginous above, pale beneath, their scape yel- 

 low in front. Thorax closely punctured, the scutellum and post- 



