24 HYMENOPTERA. 



bescent, particularly the metathorax ; the anterior tibiae in front, 

 the intermediate and posterior pairs at their base, as well as 

 the basal joints of the tarsi of the latter, yellow ; apical joints 

 of the tarsi ferruginous. Abdomen as in the other sex. 

 Hob. Hudson's Bay. (G. Barnston, Esq.) 



23. PROSOPIS AFFINIS, n. s. B.M. 



Female. Length 2 lines. Black, head and thorax closely 

 and strongly punctured ; the clypeus has some irregular longi- 

 tudinal depressions ; the face has on each side of the clypeus a 

 triangular yellow spot touching the eyes, the angle of which is 

 at the exact line of the base of the clypeus ; the apical joints of 

 the antennae beneath fulvous. Thorax, the collar, tubercles, 

 tegulae in front, and all the tibiae at their base bright yellow. 

 Abdomen ovate, smooth and shining, the sides having a little 

 silvery pile observable in certain lights. 



Male. The face below the insertion of the antennae yellow; 

 the tubercles, tibiae at their base and the tarsi yellow; apical 

 joints of the intermediate and posterior pairs ferruginous. Ab- 

 domen as in the other sex. 

 Hab. North America. (E. Doubleday, Esq.) 



24. PROSOPIS CONFLUENS, n. s. B.M. 



Female. Length 3 lines. Black, the face on each side of 

 the clypeus yellow, terminating obliquely upwards. Thorax co- 

 vered entirely with deep punctures, which are confluent; the 

 enclosed space below the post-scutellum rugose ; the collar, 

 interrupted in the middle, the tubercles in front, and all the 

 tibiae at their base, yellow; apical joints of the tarsi rufo- 

 piceous ; the base of the wings hyaline, including the first dis- 

 coidal cell, beyond which they are fuscous. Abdomen oblong- 

 ovate, very smooth and shining, covered, except the basal seg- 

 ment, with a short white pile. 

 Hab. St. John's Bluff, East Florida. (E. Doubleday, Esq.) 



25. PROSOPIS ELLIPTICA. B.M. 

 Prosopis elliptica, Kirby, Faun. Boreal. Amer. p. 266. 



Hab. Hudson's Bay. (G. Barnston, Esq.) 



26. PROSOPIS VARIOLOSA, n. s. B.M. 



Female. Length 3 lines. Black, the face yellow on each side 

 of the clypeus, the coloured portion continuing along the mar- 

 gin of the eyes, but not reaching their vertex ; down the centre 

 of the clypeus a broad yellow line ; the labrum and mandibles 

 ferruginous ; the cheeks behind the eyes flat. The thorax covered 



