THE CANADIAN ENTOMOLOGIST. 351 



I 



transverse median nervure, the latter being straight ; mandibles 



in 9 3-dentate, in ^ 2-dentate Priononyx, Dahlb. 



Subfamily II. — AmmophiHna?. 



The species falHng in this group are much more slender and elongate 

 than those of the other groups, and are at once distinguished by the 

 simple^ ufianned claws, and by the venation of the wings ; the second 

 cubital cell in the front wings always receives both recurrent nervures, 

 while the cubitus in the hind wings originates beyond the transverse 

 median nervure. The tarsal comb in the 9 is always present. 



Two other subfamilies — SceliphroniiKZ and Podiince — have both 



recurrent nervures received by the second cubital cell ; but in these 



families the claws are armed with a tooth beneath, the tarsal comb in the 



? is always wanting, while the cubitus in the hind wings is interstitial 



with the transverse median vein. 



Only four genera fall into this family, distinguished as follows : 



Table of Genera. 



Front wings with two cubital cells 2. 



Front wings with three cubital cells : submedian cell a little shorter than 

 the median. 



Petiole of abdomen not especially long, i-jointed, the second seg- 

 ment campanulate ; clypeus in $ with a more or less distinct 



median emargination Psammophila, Dahlb. 



Petiole of abdomen very long, 2-jointed, the second segment being 

 elongate and slender, forming with the first a long petiole. 



Third cubital cell not petiolate Ammophila, Kirby. 



Third cubital cell petiolate Miscus, Jurine. 



2. Petiole long, 2-jointed, as in Ammophila ; submedian cell as long as 



the median Caloptera, Fabricius. 



Subfamily III. — Sceliphroninge. 

 In having both recurrent nervures received by the second cubital 

 cell, this subfamily approaches the Ammophilince, but it is readily 

 separated from it by the claws having, as a rule, a single tooth beneath ; 

 by the cubitus in the hind wings being interstitial with the transverse 

 median nervure, and by the ? always being without a tarsal comb. 



From the Podiince it is separated by the antennae being inserted on 

 the middle of the face, by the large U-shaped area on the metathorax or 

 middle segment, and by the much shorter mesopleura. 



