740 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



Malar space at least twice as long as wide or longer; facial 

 line longer than transfacial; clypeus sulcate, puncto- 



striate validua 



4. Malar space one-fifth to one-fourth as long as wide; length 

 9-11 mm.; prothorax without strong lateral spines; pubes- 

 cence of dorsum of thorax not mixed with black; second 

 dorsal abdominal segment minutely punctate or impunc- 

 tate; wings yellowish; inner claw with a median tooth; 



pubescence ochraceous americanus 



Characters mostly as in americanus, as described above, but 

 second dorsal abdominal segment rather coarsely punc- 

 tate; fasciae narrow; second submarginal cell narrowed 

 about one-half above; claws cleft, the divisions nearly 

 equal aestivalis 



Males, 



1. Fourth antennal joint shorter than second and third com- 



bined, not much longer than third 2 



Fourth antennal joint as long as second and third combined 3 



2. Second to fifth ventral abdominal segments not densely 



bearded laterally; malar space as in female; head as long 

 as wide; dorsum of thorax with ochraceous pubescence; 

 second submarginal cell not much narrower above than 



below .validus 



Second to fifth ventral abdominal segments densely bearded; 

 malar space short, nearly as in female of aestivalis; second 

 submarginal cell strongly narrowed above; size nearly as 

 in americanus aestivalis 



3. Malar space at least one-half as long as wide 4 



Malar space not more than one-third as long as wide; post- 



scutel densely punctate and pubescent; mesonotum rather 

 evenly punctate; prothoracic spines indistinct; pubescence 

 ochraceous; length 8 mm americanus 



4. Propodeum as in female; malar space as long as wide; pubes- 



cence of dorsulum mixed with black; length 8-9 mm..compactus 

 Propodeum as in female; body black; malar space shorter 

 than wide; length 10-12 mm inaequalis 



C. inaequalis Say. C. propinquus Cresson. C. canadensis 

 Cresson. 



New Haven, 4-10 May, 1904 (W. E. B., H. L. V.). 



C. validus Cresson. 



New Haven, 4-7 May, 1904 (W. E. B., H. L. V.). 



C. compactus Cresson. 



