No. 22.] HYMENOPTERA OF CONNECTICUT. 345 



ulate; scape entirely black; pale marks of thorax luteous; 

 propodeum rather smooth, but deeply punctate; areola 

 smooth and shining, rather indistinctly sculptured and 

 hexagonal, the carinae forming its boundary not sharp; 

 areola about as long as wide at apex; its base separated 

 from scutel by a groove that is seemingly not as wide 

 antero-posteriorly as scape is thick; areolet pentagonal, 

 its radial side a little shorter than either of its cubital 

 sides and approximately half as long as either transverse 

 cubitus; legs black with the exception of fore tibiae, which 

 are pale in front pcquoitorum 



11. Apex of abdomen immaculate 12 



Apex of abdomen with one or more pale spots; scutel white, 



penultimate dorsal abdominal segment also with a pale 

 spot; face without pale orbital lines; pronotum above, line 

 in front of tegulae, and a line beneath tegulae, white; wings 

 hyaline or nearly hyaline. Length 9-12.5 mm brevicinctor 



12. Wings fuliginous 13 



Wings hyaline 18 



13. Scutel more or less white 14 



Scutel black 15 



14. Head not buccate. Length 14 mm caliginosus 



Head buccate. Length 19 mm orpheus van 



15. Head subquadrate; posterior angles of propodeum rounded.. 16 

 Head not subquadrate; posterior angles of propodeum spini- 



form; abdomen, at least above, black; depressions at base 

 of second dorsal segment shallow. Length 12.5-15 mm. 



malacus 



16. Pale orbital lines distinct in front above antennae; depres- 



sions at base of second dorsal abdominal segment with 

 their greatest length equal to one-third the basal width 



of the segment. Length 19 mm orpheus 



Face entirely black; depressions at base of second dorsal ab- 

 dominal segment with their greatest length equal to one- 

 fourth the basal width of the segment. Length 15 mm. .. 



saucius 



17. Scutel more or less white; postpetiole above broadly dilated; 



gastrocoeli moderately deep 18 



Scutel black; abdomen, at least above, black, though some- 

 times faintly tinged with blue; postpetiole punctate above. 

 Length 12.5 mm apertus 



18. Anterior orbits indistinctly pale. Length 9-15 mm subcyaneus 



Anterior orbits very distinctly pale cinctitarsis 



19. Hind legs mostly black or blue 20 



Hind legs mostly or entirely reddish; apex of abdomen more 



or less white. Length 6-9 mm helvipes 



20. Only tibiae of hind legs marked with white or yellow 21 



