HYMENOPTERA. 31 



beneath coarsely punctured ; the margins of the segments 

 smooth, shining and piceo-ferruginous. 

 Hab. New Holland. 



47. PrOSOPIS IMPRESSIFRONS, n. s. B.M. 



Male. Length 4^ lines. — Black, head and thorax strongly punc- 

 tured, the clyjieus and a small angular elevation above, as well as 

 a narrow stripe along the inner orbits of the eyes, bright yellow ; 

 a smooth, elongate, deep sulcation on each side of the clypeus ; 

 the scape dilated, concave behind; the flagellum fulvous beneath; 

 the mandibles grooved exteriorly, the stemmata placed in a 

 curve. Thorax, the collar slightly internipted, a spot on the 

 tegulse in front, the tubercles, a lunate-shaped patch behind, the 

 scutellum and post-scutellum bright yellow ; the enclosed space 

 beneath smooth and shining ; wings fusco-hyaline ; both the re- 

 current nerviu-es received about one-fourth within the second 

 submarginal cell; beneath very coarsely punctured; anterior 

 tibiae in front and the claws ferruginous ; posterior tibiae and all 

 the tarsi clothed with short white pubescence. Abdomen, the 

 basal segment finely, the rest much more strongly punctured, all 

 the margins smooth and shining ; beneath covered with large 

 elongate scattered punctures. 



Hab. New Holland. 



48. Prosopis desponsa, n. s. B.M. 



Female. Length 4| lines. — Black, abroad yellow stripe down 

 the centre of the clypeus, on each side of which is a smooth im- 

 pressed line ; above, on each side is a deep depression. Thorax 

 strongly jjunctured, the collar, tubercles, and a lunate-shaped spot 

 behiml" the scutellum and a large spot on the post-scutellum, 

 yellow ; the enclosed space beneath smooth and shining ; wings 

 subhyaline ; all the tarsi and posterior tibiae clothed with white 

 pubescence ; claws ferruginous. Abdomen, the basal segment 

 more finely punctured than the rest, and having laterally on its 

 apical margin a small patch of white pubescence, a httle scattered 

 white pubescence along the sides of the abdomen, that on the 

 apical segments black ; beneath coarsely punctured. 



This is probably the female of P. impressifrons. 

 Hab. New Holland. 



49. Prosopis nubilosa, n. s. B.M. 



Female . Length 3i lines. — Black, the head more elongate than 

 in P. nigrifrons, the clypeus beautifully aciculate, interspersed 

 with elongate punctures, having a spot near the anterior margin 

 and a narrow Hue along the margins of the eyes, yellow. Thorax 



