No. 22.] HYMENOPTERA OF CONNECTICUT. 637 



19. Body with extensive reddish ornaments 20 



Body with whitish, yellowish, or luteous ornaments 21 



20. Postscutel yellowish dorsalis 



Postscutel black boscii 



21. Postscutel yellowish or whitish; propodeum separated from 



the postscutel by a fissure or notch; second dorsal abdom- 

 inal segment without yellow spots; scutel black 22 



Postscutel black boscii 



22. Ornaments whitish leucomelas 



Ornaments yellowish foraminatus 



23. Postscutel black 24 



Postscutel yellowish 25 



24. Thorax with yellowish ornaments; first abdominal segment 



(and sometimes second) with a yellowish margin, .nortonianus 

 Thorax black nortonianus var. 



25. Second abdominal segment with two free yellowish spots.. 26 

 Second abdominal segment without free yellowish spots 32 



26. First abdominal segment with two yellowish spots or oblique 



yellowish lines 27 



First abdominal segment without yellowish spots 29 



27. Second abdominal segment with its apical margin slightly 



reflexed 28 



Second abdominal segment with its apical margin not ser»sibly 

 reflexed anormis 



28. First dorsal abdominal segment with free yellowish spots 



collega 

 First dorsal abdominal segment with oblique yellowish lines 



vagus 



29. Postscutel with a yellowish band 30 



Postscutel with two yellowish spots nortonianus 



30. Second abdominal segment with its apical margin not re- 



flexed 31 



Second abdominal segment with its apical margin slightly 

 reflexed collega 



31. First four abdominal segments with yellowish margins, .anormis 

 Only first, second, and fourth abdominal segments with yel- 

 lowish margins pedestris 



32. First and second abdominal segments without free yellow 



spots 3S 



First abdominal segment with two yellowish spots collega 



33. Abdomen with yellowish margins on more than the first 



two segments 34 



Abdomen with yellowish margins on only the first two seg- 

 ments, the apical margin of the second segment reflexed 



collega var. 



34. Only first, second, and fourth abdominal segments with yel- 



lowish margins pennsylvanicus 



