42 ACADEMY OE NATURAL SCIENCES 



Eyes black; antennae, shaft brown, whitish at base; humerus, 

 scutcl, and intervals between the dilated lines of the thorax pale; 

 wings immaculate, costal edge near the tip somewhat dusky ; feet 

 greenish-white, anterior tibia and the tarsi dusky. 



Length one-fifth of an inch. % . 



4. C. GEMINATUS. — Thorax fuscous ; pleura gray ; abdomen 

 white, annulate with black. 



Inhabits Pennsylvania. 



Humerus gray, the color being a continuation of that of the 

 pleura ; pectus livid ; feet white ; thighs blackish, pale at base ; 

 tibia at base and tip, and tarsi at tip fuscous ; abdomen with three 

 broad double bands, formed thus : second segment fuscous with 

 the exception of the posterior margin, third segment fuscous on 

 the basal margin, fourth segment fuscous excepting the posterior 

 edge, fifth segment fuscous on the basal half, sixth and seventh 

 segments entirely fuscous. 



Leugth three-twentieths of an inch. 



5. C. LINEATUS. — Wings white ; stethidium yellowish testace- 

 ous, a fuscous longitudinal line on the anterior dilated line. 



Inhabits Pennsylvania. 



Thorax pale-greenish, the dilated lines yellowish testaceous, a 

 longitudinal narrow line very distinct and fuscous on the anterior 

 dilated line, and green rather obsolete behind; scutel pale ; wings 

 immaculate ; feet whitish, incisures of the knees of the inter- 

 mediate and posterior feet brown ; tergum greenish, posterior 

 margins of the incisures dusky. [ 15 ] 



Length 9 nearly three-tenths of an inch. 



[Wiedemann has changed this into C. lineola. — Sacken.] 



0. 8TIGMATERUS. — Tcrgum pale, towards the tip glaucous. 



Inhabits the United .States. 



Antennae pale yellowish-brown ; thorax pale cinereous, the 

 lines very pale testaceous, sometimes tinged with dusky ; scutel 

 yellowish ; metathorax reddish-brown ; wings white with a fus- 

 cous sub-central stigma ; pectus testaceous ; feet pale-yellowish ; 

 tergum, basal segments pale reddish-brown with whitish tips, 

 terminal segments somewhat glaucous. 



Length three-tenths of an inch. %. 



[This has been changed by Wiedemann into C. fjlaucurus. — 

 Sacken.] 



[Vol. III. 



