OF NATURAL MISTORY. 693 



pair at tibirc and tarsi paK-r than the thighs; piKsterinr ci».\a» 

 nearly as long as the thighs. 



Length throe-fifths of an inch. 



This insect differs somewhat in appearance from its congeners. 

 The form of the abdomen, excepting that it is not compressed, 

 the fact that it originates higher upon the metathorax than the 

 others, and the elongated posterior coxae, give it u little the air 

 of a Fuiiu.<, but the numerously jointed antenme j)lace it in this 

 fivmily. [237] 



11. C. NDNCius. — IJlack J abdomen excepting the base and 

 tip rufous. 



Inhabits Pennsylvania. 



Body black ; palpi white, blackish at tip ; antennae 9 a long 

 white annulus in the middle ; thorax immaculate ; two impressed 

 lines: wings hyaline ; norvures brown; t-tigma ratlur slender j 

 second cubital cellule rather large, pentagODal, the two angles on 

 the radial nervure nearly rectangular ; recurrent ncrvures almost 

 rectilinear : tergum basal segment wholly or in part black ; 

 second, third and generally half of the fourth rufous or honey- 

 yellow; remaining segments black : oviduct nearly half the length 

 of the abdomen : feet honey-yellow ; posterior pair of tibia) at tip 

 and knees black ; posterior tarsi pale yellowish. 



Length about two-fifths of an inch. 



I obtained many specimens from the larva of Attncus jirome- 

 fhea Linn, several years ago. 



12. C. SUBCLAVATUS. — Black ; auteuuiv; subclavate, at base 

 and feet honey -yellow. 



Lihabits United States. 



Body black : antennae on the basal half piceous or dark honey- 

 yellow, dilating gradually towards the tip, terminal half dusky 

 or black ; first joint robust : thorax depressed on the posterior 

 disk, in which are longitudinally confluent punctures; a slightly 

 elevated line before the bi-foveolate scutellar groove : wings, 

 radial cellule rather wide and short : cubital cellule pentangular, 

 sides .subo([ual, angles at the radial cellule nearly rectangular : ab- 

 domen 9 oval, honey-yellow, dusky or blackish at base and tip : 

 oviduct nearly half the length of the abdomen : feet honey- 

 yellow. 

 1835.] 



