690 BOSTON JOURNAL 



Resembles wqukitor nob., but the posterior margins of the 

 segments of the tcrgum are white. [233] 



4. C. DUCTiLis. — Second cubital cellule petiolated ; abdomen 

 falcate. 



Inhabits Indiana. 



Body black ; basal joint of the antennas beneath and mouth 

 whitish ; thorax without obvious impressed lines : wings hyaline ; 

 nerVures fuscous; second cubital cellule minute, petiolated : ab- 

 domen arcuated, slender at base, more dilated and compressed 

 towards the tip, but not truncate ; honey-yellow, dusky at base : 

 oviduct more than half the length of the abdomen, a little re- 

 curved, black : feet honey-yellow : anterior and intermediate coxae 

 and trochanters whitish ; posterior feet rather more dusky. 



Length under three-tenths of an inch. 



In the form of the abdomen and general appearance it resem- 

 bles Anomaloii ejimcidus nob. 



5. C. TENELLUS. — Honey-ycUow ; wings banded. 

 Inhabits Pennsylvania. 



5 Antennae blackish towards the tip : wings hyaline ; a fuligi- 

 nous band before the middle, and a much dilated or double one 

 beyond the middle including the stigma; stigma triangular, and 

 with the nervures brown; radial cellule wide; second cubital 

 somewhat rounded, the exterior nervure wanting ; apical nervure 

 obsolete : metathorax beneath the scutel and at the insertion of 

 the abdomen black : abdomen arcuated, blackish at tip : oviduct 

 half as long as the abdomen. 



Length nearly three-tenths of an inch. 



G. C. INQUISITOR nob. Contrib. Macl. Lye. p. 71. — Tergum 

 rather densely punctured in every part ; segments with a trans- 

 verse, slightly indented, obtuse line in the middle : venter whitish, 

 with black lateral spots. [ 234 ] 



Var. ct- Much larger ; oviduct hardly over half the length of 

 the abdomen. 



Length two-fifths of an inch. 



7. C. CALiPTERUS. — Wings yellowish, fasciate; central cel- 

 lule pentagonal. 

 Inhabits Mexico. 



[Vol. I. 



