40 ACADEMY or NATURAL SCIENCES 



June. The liairy covering is very deciduous, and when an in- 

 dividual is caught by hand, the back of the thorax, in conse- 

 quence of being denuded by the touch, exhibits the dorsal vittse 

 of a blackish color confluent at the base, with an oval black spot 

 on each side. The abdominal annuli are sometimes fuscous or 

 even light brown. 



Legs much shorter than those of the preceding species, but 

 like them in not being annulated. 



[Also an Anopheles: Wiedemann has named it A. fcrrugi- 

 nosus. — Sacken.] 



2. C. DAMNOSUS. — Rostrum and tarsi annulate with white. 



Inhabits Pennsylvania. 



Head above with rather long yellow-ferruginous hair ; antennae 

 pale-brownish ; rostrum blackish ; with a broad white band on 

 the middle ; thorax black, with three cinereous lines, and clothed 

 with yellow-ferruginous short hair ; scutel dull testaceous ; pleura 

 grayish ; feet pale, covered with blackish hairs ; joints of the 

 tarsi, excepting the first, Avhitish at their bases ; tergum brown, 

 basal margins of the segments cinereous-whitish. 



Length a quarter of an inch. 



This is one of the most common and troublesome of our mos- 

 quitoes. It seems to correspond in some degree with the cingu- 

 Jatus Fabr., although we must infer from his description, that 

 the posterior tarsi [12] only are annulated. Wiedemann con- 

 siders the dngulatus as the male of his molestus, of which all the 

 tarsi are annulated, like those of our species. I feel, however, 

 perfect confidence in the description of Wiedemann, and there- 

 fore must consider our species distinct, inasmuch as the thorax is 

 not " lateribusque niveis ;" and from the laudable accuracy of 

 that author, I cannot suppose that he would have overlooked 

 the annulation of the proboscis, which certainly exists in this 

 species. 



[Wiedemann has changed the name to C. tsenioi'Tiynchus. — 

 Sacken.] 



4. C. triseriatus. — Anterior margin of the wings fuscous; 

 tergum with white spots on each side. 



Inhabits Pennsylvania. 



Body brown ; stethidium livid-brown ; thorax with white hair 

 each side ; pleura with two spots of white hair ; feet pale, covered 



[Vol. III. 



