NO. 22.] HYMENOPTERA OF CONNECTICUT. 351 



16. Hind tarsi with at least first and second joints yellowish or 



whitish, with fuscous tips; fore and mid coxae yellow, hind 



coxae black cinctitarsis 



Hind tarsi entirely black, all coxae white. Length 15-17.5 mm. 



ultus 



17. Postpetiole coarsely scratched above 18 



Postpetiole smooth or only punctate above; wings subhyaline; 



the white line on hind tibiae not reaching to the tip. Length 

 9-15 mm subcyaneus 



18. Abdomen black above, second segment uniformly sculptured; 



hind coxae with white maculations. Length I5-I7-5 mm 



ultus var. rogalis 

 Abdomen bluish black above, second segment coarsely and 

 longitudinally rugose on the basal half; hind coxae entirely 

 black. Length 14-15 mm stadaconensis 



19. Scutel white 20 



Scutel white only along lateral margins; abdomen blue, at 



least above. Length 11-17.5 mm caeruleus 



20. Abdomen black, at least above; propodeum with a white spot 



on each side. Length 15 mm infidelis 



Abdomen black, at least above; propodeum immaculate. 



Length 14-16 mm azotus 



2i. Antennas mostly black and blue or entirely black 22 



Antennae mostly orange-yellow, black at extreme base and 



apex. Length 17.5 mm flavicornis 



22. Antennae mostly black, and with a pale annulus 23 



Antennae entirely black or blue; face mostly white and with 



a black median longitudinal stripe; scutel white, as are fore 

 and mid coxae. Length 19-20 mm pepticus 



23. Apex of abdomen immaculate; wings dark fuliginous 24 



Apex of abdomen with one or more pale spots 26 



24. Postpetiole entirely black 25 



Postpetiole more or less white at tip; face white, e:ept in 



some individuals in which the lateral depressions are 

 black. Length 12.5-16 mm unifasciatorius 



25. Face entirely black. Length 15-17 mm galenus 



Face black and white; scutel black and white. Length 16 



mm ? pequoitorum 



26. Postpetiole entirely black above 27 



Postpetiole with a narrow (antero-posterior) apical margin 



of white above; propodeum with a white spot on each 

 side. Length 13 mm merus 



27. Hind trochanters black. Length 9-12.5 mm brevicinctor 



Hind trochanters white. Length 9.5-12.5 mm extrematatis 



28. Apex of abdomen partly or entirely black or yellow 29 



Apex of abdomen partly or entirely fulvous 4 1 



