No. 22.] HYMENOPTERA OF CONNECTICUT. 687 



Key to Species. 



1. Females 2 



Males 6 



2. Abdomen entirely red or red and black 3 



Abdomen black or with only apical segments red 4 



3. Dorsal aspect of the propodeum coarsely wrinkled, .quebecensis 

 Dorsal aspect of propodeum granular tarsatus 



4. Interorbital line less than length of antennal joints three and 



four united acutus 



Interorbital line greater than or equal to length of third and 

 fourth antennal joints 5 



5. Dorsal aspect of propodeum granular; usually two apical 



abdominal segments red terminatus 



Dorsal aspect of propodeum strongly reticulate; usually only 

 apical abdominal segment red apicalis 



6. Abdomen red or red and black 7 



Abdomen black or with the apical segments red 8 



7. Interorbital line subequal in length with third and fourth 



antennal joints; abdomen red; dorsal aspect of propodeum 



granular tarsatus 



Interorbital line less than length of third and fourth antennal 

 joints; abdomen red and black; dorsal aspect of propodeum 

 wrinkled quebecensis 



8. Abdomen ventrally rather strongly punctate; sides of pro- 



podeum coarsely striate apicalis 



Abdomen ventrally finely punctate; sides of propodeum finely 

 striate 9 



9. Front coarsely sculptured fuscus 



Front rather finely sculptured terminatus 



T. acutus Patton. 



T. apicalis Fox. 



Poquonock, 27 June, 1905 (H. L. V.). 



T. quebecensis Provancher. 



T. tarsatus Say. 



T. terminatus Smith. 



T. fuscus Fox. 



Astatine. 



The wasps belonging to this subfamily are rather small, 

 seldom more than 12 mm. in length. They are usually black or 

 black and red. The eyes of the female converge but little toward 

 the vertex, while the male is often holoptic. These little wasps 

 nest in the ground and provision their nests with Homoptera. 



