No. 22.] HYMENOPTERA OF CONNECTICUT. 63I 



Episyron Schiodte. 

 This interesting genus can easily be recognized by the charac- 

 ters given in the key. 



Key to Species. 

 Apical abdominal segment with a white spot; wings pale 



except apex 5-notatus 



Apical abdominal segment black; wings uniformly blackish.. 



biguttatus 



E. biguttatus Fabricius. 



Provisions its nest with Epeira labyrinthea, according to the 

 Peckhams. 



Occurs throughout the State. 



E. 5-notatus Say. 



According to the Peckhams, this species provisions its nest 

 with Epeira strix. 



Occurs throughout the State. 



Aporinellus Banks. 



This genus has usually gone under the name Aporus until 

 recently, when Mr. Banks has shown that the true Aporus is a 

 very different insect. 



A. fasciatus Smith. 



Black, densely clothed with silver pile. 



Occurs throughout the State. 



Pompiloides Radoszkowski. 

 Key to Species. 



1. Abdomen marked with red 2 



Abdomen entirely black 4 



2. Posterior margin of pronotum arcuately emarginate . .marginatus 

 Posterior margin of pronotum sharply, angularly emarginate 3 



3. Wings uniformly black; larger tropicus 



Wings darker at apex americanus 



4. Black; posterior margin of pronotum subangularly emarginate 



cylindricus 

 Bluish; posterior margin of pronotum arcuately emarginate 5 



5. Wings fusco-hyaline; three basal abdominal segments with- 



out dense pile subviolaceus 



Wings hyaline; three basal abdominal segments with dense 

 silvery pile argenteus 



°P. americanus Beauvais. 



