No. 22.] HYMENOPTERA OF CONNECTICUT. 7OI 



6. Dull greenish or bluish; second cubital vein present 7 



Black m \\ I4 



7. Mandibles dentate; cheeks rounded behind 19 



Mandibles simple; cheeks with a rounded angle behind, a 



little above middle of eye cephalicus 



8. Black, sometimes inclining to reddish; hind spur of hind 



tibiae with about six to eight teeth 9 



Dull greenish; hind spur of hind tibiae with four or five teeth 



provancheri 



9. Cheek produced into a strong tooth-like angle posteriorly 



ligatus 

 Cheek rounded, not so produced lerouxi 



10. Abdomen green; mesonotum with practically all of its punc- 



tures of the same size 11 



Abdomen black virescens 



11. Propodeum strongly rugose longitudinally, without an en- 



closure radiatus 



Propodeum coarsely reticulated, with a finely rugose tri- 

 angular space where joined to thorax proper splendens 



12. Sides of mesonotum reticulated 13 



Sides of mesonotum not reticulated purus 



13. Larger, greener; antennae, tegulae and legs darker; hind 



tibiae mostly dark, blackish confusus 



Smaller, more brassy; antennae, tegulae and legs paler; hind 

 tibiae almost entirely stramineous persimilis 



14. Abdomen without, or with interrupted, pubescent fasciae 15 



Abdomen with continuous pubescent fasciae; hind spur of hind 



tibiae with four or five distinct teeth 16 



15. Propodeum sharply truncate along its rear margin; hind spur 



of hind tibiae with long distinct teeth; first abdominal seg- 

 ment not punctate truncatus 



Propodeum slightly rounded along its rear margin; hind 

 spur of hind tibiae with less distinct, more oblique, and 

 sharper teeth than in truncatus; first abdominal segment 

 finely punctate arcuatus 



16. Propodeum without an enclosed space 17 



Propodeum with an enclosed space 18 



17. Propodeum densely pubescent; enclosure bare and sub- 



triangular nelumbonis 



Propodeum bare or nearly so; enclosure semicircular, .pectoralis 



18. White pubescent patches on each side of second, third, and 



fourth abdominal segments quadrimaculatus 



No white pubescent patches on abdominal segments foxi 



19. Tegulae punctate 20 



Tegulae not punctate 2I 



