18 ANDKENIDiE. 



4. Prosopis cognata. 



female. Length 3|— 4 lines. — Head and thorax black, with yellow 

 spots ; the abdomen dark blue. Head closely punctured ; the clypeus 

 slightly produced and anteriorly truncate ; on each side of the face 

 there is a large crescent-shaped yellow spot, extending upwards 

 above the insertion of the antennae ; the flagellum fulvous beneath. 

 Thorax closely punctured ; the tubercles and a spot on the scu- 

 tellum and on the postscutellum yellow, that on the scutellum 

 semicircular ; the metathorax truncate ; legs black. Abdomen 

 shining and with fine punctures. 



Male. Length 3^ lines. — Closely resembling the female, but with the 

 face entirely yellow as high as the antennae ; the flagellum fulvous 

 beneath. Thorax as in the female ; the anterior tibiae and first 

 joint of the tarsi in front, the femora beneath at their apex, and 

 the intermediate tibiae in front yellow ; wings and abdomen as in 

 the female. 



Hah. Champion Bay ; Swan River. 



This species closely resembles P. obtusata, but differs from it in 

 the form of the head, the clypeus being produced. 



5. Prosopis elongata. 



Male. Length 4 lines. — Black, and with yellow markings ; the 

 abdomen one third longer than the head and thorax. The head 

 subrotundate, only a little longer than broad ; the face as high as 

 the antennae yellow ; the flagellum fulvous beneath. Thorax very 

 finely and closely punctured ; the tubercles, scutellum, and post- 

 scutellum yellow ; the metathorax truncate, opaque, and with a 

 thin griseous pubescence ; the anterior tibiae and tarsi ferruginous, 

 the former fuscous behind. Abdomen shining, very finely and 

 closely punctured ; the margins of the first and second segments 

 slightly constricted. 



Hab. Adelaide. 



6. Prosopis bituberculata. 



Male. Length 3 lines. — Black, variegated with yellow ; the third 

 ventral segment of the abdomen produced laterally into a large, 

 subtriangular, compressed tubercle. Head rotundate ; the face as 

 high as the antennae bright yellow; the scape dilated, the flagellum 

 fulvous beneath. Thorax very closely and finely punctured ; the 

 tubercles and a slightly interrupted line on the collar yellow ; the 

 anterior tibiae in front, the intermediate pair with a line in front, 

 and the basal joint of the tarsi, the posterior tibiae at their base, 

 and the first joint of the tarsi yellow ; wings hyaline and irides- 



