THE CANADIAN ENTOMOLOGIST. 87 



Third cubital cell usually a little smaller than the second ; first 

 joint of flagellum in $ longer than the second, in £ not longer 

 than the second, about thrice as long as thick ; claws in y with 

 a median tooth, in <$ cleft. .(25) Aphiloctenus, Ashm., g. nov. 



(Type Pompilus virginiensis, Cress.) 



Third cubital cell larger than the second; first joint of flagellum 

 in $ elongate, nearly as long as 2 and 3 united, in J not or 

 scarcely longer than the second, but about four times as long 

 as thick ; claws cleft in both sexes . . . . (26) Hemisalius, Sauss. 



(Type H. albistylus, Sauss.) 



Tribe II. — Aporini. 



The front wings with one or two cubital cells, never three as in the 

 tribe Pompilini, and the slight difference in the insertion of the antennae, 

 will readily distinguish the tribe. 



The group comes quite close to the subfamily Planicepince, in which 

 are found .forms with only two cubital cells in the front wings, so that the 

 closest attention must be given to the characters used in separating the 

 subfamilies or the student will go astray and confuse some of these forms 

 with genuine Aporini. 



Table of Genera. 



Metathorax posteriorly rounded, the hind angles unarmed 2. 



Metathorax posteriorly truncate, depressed or emarginate, the hind 

 angles more or less distinctly produced into conical teeth or spines. 

 Cubitus in hind wings usually interstitial or nearly ; tarsal comb 

 present ; claws with teeth ; mandibles 



3-dentate . ( 1 ) Aporus, Spinola. 



(Type A. unicolor, Spin.) 



2. Cubitus in hind wings originating beyond the transverse median 



nervure 4. 



Cubitus in hind wings interstitial with the transverse median 

 nervure : 3. 



3. Transverse median nervure in front wings interstitial with the basal 



nervure ; tarsal comb in $ present ; claws toothed and combed ; 



mandibles 2-dentate (2) Evagetes, Lepeletier. 



(Type Pompilus bicolor, Fabr.) 



4. Transverse median nervure in front wings uniting with the median vein 



beyond the origin of the basal nervure 5. 



