694 BOSTOX JOURNAL 



Length under one-fifth of an inch. [238] 



Approaches a little to the genus Hchciyia by the form of its 

 antennae. I found one specimen in Pennsylvania and another in 

 this State. 



13. C. MICROPTERUS, J . — Black ; feet and middle of the ab- 

 domen rufous; wings abbreviated. 



Inhabits Pennsylvania. 



Body black : antennae, honey-yellow, with a paler yellow annu- 

 lation : palpi whitish : wings not reaching the tip of the meta- 

 thorax : metathorax concave behind ; posterior angles a little 

 prominent : tergum polished, suboval ; first segment black ; 

 second and third honey-yellow ; remaining segments black : ovi- 

 duct half the length of the abdomen : feet honey-yellow, paler 

 at their origin ; posterior pair of thighs and tibiae each at tip 

 blackish. 



Length one-fifth of an inch. 



This seems to be related to C. ahhreviatus Fabr., but it has no 

 " striga alba." 



OPIIIOX Fabr. 



1. Q. PURGATUS. — Honey-3'ellow ; two opake dots in the first 

 cubital cellule. 



Inhabits Indiana. 



Body pale honey-yellow, somewhat sericeous : antennae rather 

 longer than the body : orbits yellow, dilated before so as to oc- 

 cupy the greater part of the hypostoma : ocelli large, prominent : 

 wings hyaline ; stigma slender ; first cubital cellule with two 

 opake, subtriangular spots j second cubital cellule none : meta- 

 thorax with a single, raised, rectilinear, transverse line, near the 

 base. 



Length about seven-tenths of an inch. 



This is much like an insect sent me by Mr. Winthem [239] 

 as the rartiididus Fabr., which has also opake wing-spots, but is 

 black on the tip of the abdomen. The hiUneatus nob., may be 

 distinguished from this species by having many raised lines on 

 the metathorax and by being destitute of the opake wings-spots. 

 The sexes are similar in color, and both have the opake wing- 

 spots, which is not the case in Mr. Winthem's specimens of 

 ramididus. 



[Vol. I 



