NO. 22.] HYMENOPTERA OF CONNECTICUT. 673 



Key to Species. 



1. Pronotum anteriorly carinated and sharply truncate; body 



nearly uniformly closely, coarsely punctate ventilabris 



Pronotum not carinated, anteriorly declivous; body not uni- 

 formly punctate, or if uniformly punctate not coarsely so.. 2 



2. Abdomen with very large, usually confluent punctures, seg- 



ments constricted basally and depressed apically . . . . punctatus 

 Abdomen at most finely punctate, segments not both con- 

 stricted and depressed 3 



3. Flagellum tapering to thickened apex; venter with dense, 



long hair 4 



Flagellum of nearly uniform width beyond apex of first 

 joint; flagellum short; venter without dense long hairs, 

 although with some scattered hairs 5 



4. First abdominal segment without a yellow spot; third trans- 



verse cubitus straight; mesoscutum with fine, rather close 



punctures; length about 12 mm sanbornii 



First abdominal segment with a yellow spot on each side; 

 third transverse cubitus sinuate; mesoscutum with fine, 

 widely scattered punctures; length about 8 mm dubius 



5. Abdomen impunctate, first segment black, second with two 



U-shaped yellow marks, the arms of the U projecting 



posteriorly bilunatus 



Abdomen distinctly punctate, first segment with yellow mark- 

 ings, second segment without such yellow marks 6 



6. Dorsal aspect of propodeum uniformly sculptured, without 



a large depressed area; abdomen closely, finely punctate, 



first segment with a yellow band solivagus 



Dorsal aspect of propodeum with a depressed median area 

 which is surrounded by an impunctate area; abdomen very 

 sparsely punctate, first segment with two pale spots, .politus 



P. (Pseudanthophilus) ventilabris Fabricius. 



This species has not yet been taken in the State, but it has been 

 taken in other eastern states and will no doubt be found here. 



P. (Philanthus) punctatus Say. 



The coarsely punctate abdomen makes this species easy to 

 recognize. Dorsal aspect of the propodeum has a shallow de- 

 pressed median area; sides of propodeum rather finely, closely 

 punctate ; first abdominal segment black ; base of the second 

 dorsal segment with a broad yellow band, the band on the 

 following segments narrow and at the apical margin. Wings 

 dusky. 



43 



