110 GENERA OF HYMENOPTERA. 



Family POMPILIDiE. 

 Table of Genera. 



Prothorax as long or longer than the metathorax ; head broad and transversely 

 compressed ; antennie inserted low down and (tlose to the base of the 

 clypeus. generally in more or less deep fovese, the \ i tex nsually long, 



broad and flat 2. 



Prothomx shorter than the metathorax, rarely as long as the mesothorax ; head 



orbicular, as usual ; antenuee inserted higher up on the face 3. 



2. — Three submarginal cells Parapoinpilus Smith. 



Two submarginal cells Plaiiiceps Latr. 



:{.— Two submarginal cells. Aporns Spiuola. 



Three submarginal cells 4. 



4. — Marginal cell lanceolate, pointed, rarely rounded at tip 5. 



Marginal cell long, narrow, of nearly uniform width, obliquely truncate, or 



obtusely rounded at tip 6. 



5.— First discoidal cell longer than the first submarginal cell. 



Legs strongly spinose; submedian cell of anterior wings of the same 

 length as the median cell on the externo-medial nervure, rarely longer. 



Pompiliis'^ Fabr. 

 Legs sernite-spinose ; submedian cell longer than the median cell on the 

 externo-medial nervure, rarely of the same length. 



Priocneiiiis Schiodte. 



Legs not, or but feebly spinose. 



Submedian cell longer than the median on the externo-niedial nervure, 



the second discoidal cell shorter and smaller than the third ; inner 



spur of posterior tibia; more than half the length of the basal joint 



of their tarsi : antennae J more or less convolute, slender at tip. 



Ageiiia Schiodte. 

 Submedian cell of same length as the median on the externo-medial 

 nervure, the second discoidal cell almost as long as the third; inner 

 spur of the posterior tibiae scarcely one-third as long as the basal joint 

 of their tarsi, rarely half as long ; posterior legs unusually long, es- 

 pecially their tarsi ; antennaj of both sexes porrect and thickened. 



Ceropales Latr. 

 First discoidal cell rather shorter than the flret submarginal, the second 

 submarginal cell receiving the first recurrent nervure in the middle ; 

 submedian cell longer than tne median on the externo-medial ner- 

 vure, the second sonnmrgmal cell small and not half the length of the 

 safioud discoidal : body subconipresscd ; head long and narrower than 

 usual, the labrum exserted rather longer than the clypeus; legs not 



spinose, tarsjil claws deeply cleft Notocyphus Smith. 



ti. — Second submarginal cell smaller than the third, receiving the first recurrent 

 nervure very near the tip, the first dis<roidal cell as long as the first 



* Mr. E. Saunders, in his "Synojisis of British Fossorial Hymenoptera" (Trans. 

 Ent. Soc. Loud. 1880, p. 231) calls attention to a character, pointed out by Thom- 

 son, for the separation of the closely allied genera Pompilns and Priocnemis, the 

 tormer having the vertex impunctured, and that of the latter distinctly punc- 

 fured in both sexes ; this character, however, does not seem to apply to our species. 



