No. 22.] HYMENOPTERA OF CONNECTICUT. 257 



constricted at base, mid tibiae not appearing as if twisted; 

 head subquadrate, joints of flagel cylindrical, body not 

 cylindrical; marginal cell extending nearly to apex of wing 



Xylonomus p. 310 



118. Eyes subemarginate; hind coxae cylindrical, as long as or 



nearly as long as hind femora 119 



Eyes not emarginate; hind coxae swollen, shorter than hind 

 femora, areolet subpetiolate, triangular, tibiae not inflated; 

 propodeum not areolated, but with a shallow longitudinal 

 groove on its disk Euxorides p. 309 



119. Face roughened, cheeks without a tooth-like process; pro- 



podeum areolated; fore and mid tibiae of female dilated, 

 narrowed, and towards the base appearing as if twisted; 

 abdomen subpetiolate, clavate, basal segment straight, 



gradually widened toward apex Labena p. 309 



Face smooth, not roughened, polished, cheeks with a tooth- 

 like process; propodeum not areolated, smooth and pol- 

 ished; tibiae not as in Labena; abdomen petiolate, basal 

 segment straight, but curved upward towards apex, which 

 is somewhat dilated, exserted portion of ovipositor as 

 long as first abdominal segment Grotea p. 309 



120. Wings normal 121 



Wings rudimentary or absent; exserted portion of ovipositor 



more than half the length of first abdominal segment; pro- 

 podeum not or indistinctly areolated 127 



121. Ovipositor distinctly exserted 122 



Ovipositor not or scarcely exserted; abdomen smooth and 



polished, ovate or almost circular, wider than thick or de- 

 pressed Stilpnus p. 341 



122. Areolet complete 123 



Areolet incomplete, forming an imperfect pentagon, its outer 



nervure wanting Hemiteles p. 337 



123. Areolet pentangular or subquadrate 124 



Areolet rectangular, receiving second recurrent vein at or 



near its tip Mesostenidea p. 329 



124. Antennae of female with joints of flagel rather nodose at 



tip 125 



Antennae with joints of flagel cylindrical throughout; pro- 

 podeum with elongate linear spiracles 126 



125. Third joint of antennae at most twice as long as thick, or 



antennae thickened between middle and apex and in some 

 species also expanded; postpetiole in male broader than 



petiole, first dorsal abdominal segment geniculate 



Phygadeuon p. 333 

 Third joint of antennae in most species three or more times 

 as long as thick (if shorter, then propodeum not areolated), 

 not thickened or expanded towards middle; postpetiole 

 17 



