No. 22.] HYMENOPTERA OF CONNECTICUT. 239 



tion on each side of the concavity ; first abdominal segment nearly 

 twice as long as the propodeum. 



Type locality: New Haven, 20 May, 191 1 (A. B. C). 



EVANIID^.* 

 Key to Genera. 



1. Fore wings with but one recurrent vein in each wing 2 



Fore wings with two recurrent veins in each wing 5 



2. Fore wings, when at rest, folded longitudinally as in hornets 



{Vespa); hind wings without a posterior lobe; abdomen 

 clavate and compressed; basal segment neither filiform 

 petiolate nor strongly contrasted in form to second seg- 

 ment (Gasteruptionin^) Gasteruption p. 239 



Fore wings not folded; hind wings with an almost sepa- 

 rated posterior lobe; abdomen with its basal segment 

 filiform petiolate, strongly contrasted in form to the re- 

 maining segments, which latter together are compressed 



from side to side, oval, triangular or nearly round 



(EvANiiN^) 3 



3. Fore wings each with a closed median cell 4 



Fore wings each without a closed median cell Hyptia p. 240 



4. Antennae inserted in a deep basin bordered below by a ridge. 



Evania p. 240 

 Antennae not inserted in a deep basin and without a ridge be- 

 neath them Evaniella p. 241 



5. Hind wings veinless excepting costa; claws simple 



Patnmegischia p. 242 

 Hind wings with one or two closed cells; claws with two 

 or more teeth 6 



6. Claws with three or more teeth beneath Pristaulacus p. 241 



Claws with only two teeth beneath Odontaulacus p. 241 



Gasteruption Latreille. 

 Fcenus Fabricius. 



Species of this and an allied genus have been bred from 

 Crabro, Philanthus, Cerceris, Gorytes, Eumenes, Odynerus, Hy- 

 IcBUS, Halictus, Andrena, and still other wasps and bees. 



Length 11-12 mm.; mostly black; wings hyaline and with 

 dark veins ; hind tibiae flattened, clavate. 



• The keys to the subdivisions of this group are mostly from the published work 

 of Dr. J. Chester Bradley, our foremost American authority on this family. 



