l88 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



33. Suture between second and third dorsal abdominal segments 



distinctly foveate; second dorsal abdominal plate rather 



rugulose laterally congregatus 



Suture between second and third dorsal abdominal seg- 

 ments indistinctly or not foveate; second dorsal abdominal 

 plate with an indistinct welt hemileucae 



34. Second dorsal abdominal plate sculptured throughout 35 



Second dorsal abdominal plate not sculptured throughout.. 39 



35. Hind femora pale 36 



Hind femora black or blackish; second dorsal abdominal plate 



shorter down middle than down sides carduicola 



36. Suture between second and third dorsal abdominal segments 



not sharply defined 37 



Suture between second and third dorsal abdominal segments 



sharply defined acronyctae 



2,7. Male antennae not yellowish beneath, hypopygium not ex- 

 tending beyond pygidium in female 38 



Male antennae yellowish beneath lanificus 



38. First dorsal abdominal plate punctate laeviceps var. 



First dorsal abdominal plate not punctate laeviceps 



39. Hind femora not black or blackish 40 



Hind femora mostly black or blackish; second dorsal abdom- 

 inal plate mostly sculptured theclae 



40. Hind femora mostly stramineous; second dorsal abdominal 



plate with its basal half not bounded laterally by deep, 



f oveolate, oblique furrows 41 



Hind femora mostly reddish and fuscous as in \<Bviceps 



podunkorum 



41. Hind femora unicolorous; flagel partly pale algonquinonim 



Hind femora with blackish tips; flagel entirely dark brown 



pyraustae 



42. First dorsal abdominal plate as wide at apex as at base, 



hardly wider at apex than second dorsal abdominal plate 

 is long down the middle, sides of latter parallel on apical 



half 43 



First dorsal abdominal plate distinctly narrower at apex than 

 at base; if apparently as wide at apex as at base, then 

 distinctly wider or narrower at apex than second dorsal 

 abdominal plate is long down the middle 45 



43. Propodeum with a distinct median longitudinal carina; body 



mostly black 44 



Propodeum without a distinct median longitudinal carina; 

 body mostly stramineous robiniae 



44. Second dorsal abdominal plate mostly rugulose glomeratus 



Second dorsal abdominal plate almost entirely smooth and 



polished atalantae 



