690 BOSTON JOURNAL 



Eesemble.s inquisitor nob., but the posterior margins of the 

 segments of the tergum are white. [233] 



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

 falcate. 



Inhabits Indiana. 



Body black; basal joint of the antennce beneath and mouth 

 whitish ; thorax without obvi(Ais 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 

 und 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- 

 ]>les Anomalon ejuncidus nob. 



5. C. TENELLUS. — Houcy-yellow ; 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 

 lialf as long as the abdomen. 



Length nearly three-tenths of an inch. 



6. C. INQUISITOR nob. Contrib. 3Iacl. Lye. p. 71. — Tergum 

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

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

 with black lateral spots. [234] 



Var. a.- 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. 



