1894.] NATURAL SCIENCES OF PH rr.ADEI.PHIA. 297 



]3ilus Kohl is scarcely worthy of generic distinction, and should be 

 treated as of equal value as Parapompilus Cress. 



1 — Anterior wings with three subiuarginal cells 2 



Anterior wings with two submarginal cells 9 



2 — Third** ventral segment with a transverse furrow (indistinct in 



the $ of some species) 3 



Third ventral segment without a transverse furrow 6 



3 — First recurrent uervure received by the second submarginal cell 

 in or about the middle. Hind tarsi (^) not flattened .... 4 

 First recurrent nervure received by the second submarginal cell 

 not far from its base, and considerably before its middle. Hind 

 tarsi ( $ ) flattened. Fifth, or fifth and sixth ventral segments 

 ( S- ) nearly always with long, stiff hair, often forming two tufts. 

 ISIetathorax with a more or less developed tubercle before each 



stigma Pepsis Fabr. 



4 — Hind tibiie not spinose, or scarcely so; submedian cell of fore wings 

 generally but slightly longer than the median on the externo- 



medial uervure 6 



Hind tibice more or less spinose, generally serrato spinose, most 



strongly* so in the 9 5 



o — Submedian cell of fore wings longer than the median on the ex- 



terno-medial nervure. . . . Salius Fabr. (^ PrioGnerais Sch.). 



Submedian cell of fore wings of the same length as the median 



on the externo-medial nervure (eyes converging somewhat 



towards the vertex) Calicurgus Lep.'-* 



6 — MaxilltB of 9 with a bunch of long hair at the base • 



Agenia'" Schiodte 



Maxillse of 9 naked Pseudagenia"' Kohl. 



7 — Prothorax shorter than the metathorax 8 



Prothorax longer than the metathorax; head very flat and trans- 

 verse, the clypeus planate . PARAPOMPiLrs Cress, (non Smith). 

 8 — Legs strongly spinose ; prothorax on the sides not strongly de- 

 pressed; fore femora not swollen Pompilus Fabr. 



Legs, except tibial spurs, not spinose; prothorax strongly depres.sed 



on the sides; fore femora somewhat swollen , . . . . 



Epipompiei'S Kohl. 



* Second ventral of some authors. 



9 I have not seen this genus. 



"' I can find no characters to separate the $'s oi Agenia and Pseudagenia, 

 as the characters given by Kohl are not constant. The size of the second and 

 third submarginal cells varies, and while some species of ylgenia have the 

 wings banded, in others they are clear. Of our species of Agenia Cress., 

 cjipidus, congruits, and accepius are Pseudagenia. A new genus may have to 

 be erected for A. Belfragei Cress." Cameron is mistaken in referring A. nubifer, 

 viexicanus, chloris, floridiis, auripilis, and subvirescens to Pseudagenia, as 

 they all have the bunch of hair at base of maxillse. 



