74 ACADEMY OP NATURAL SCIENCES 



Body with short hairs ', head yellowish white ; vertex in one 

 sex black, in the other dirty whitish ; front with a longitudinal 

 black line bifarious at the base of the antennas, and a transverse 

 one above ; hypostoma with an impressed sagittate spot, on each 

 side, near the base of which is a black spot ; proboscis testaceous, 

 blackish at tip; antennae dusky above, beneath terminal joint 

 rufous ; scutel dirty rufous ; feet rufous ; abdomen, segments ob- 

 soletely edged with yellowish, that of the petiole with dull cine- 

 reous ; central connecting nervure of the wings very obvious. 



Length eleven-twentieths of an inch. 



This is a larger species than the preceding, with a much more 

 considerable portion of the wings obscured, no interrupted tho- 

 racic fascia, and a much longer connecting nervure on the cen- 

 tre of the wing. 



[Name changed by Wiedemann to C. mgricornis. — Sacken.] 



ZODION Latr. 



Z. FULViFRONS. — Cinereous, front fulvous ; thorax with two 

 distant brown lines. [84] 



Inhabits Maryland and Pennsylvania. 



Head beneath, mouth, hypostoma and orbital line, pure white ; 

 proboscis black; antennae fulvous, first joint ferruginous, second 

 with a dusky line on the superior edge ; occiput blackish ; poisers 

 pale yellowish, style rufous, feet dull rufous, tibia white on the 

 exterior edge ; tergum with two irregular blackish lines, terminal 

 segments testaceous. 



Length more than three-tenths of an inch. 



On flowers. 



2. Z. ABDOMINALIS. — Testaceous ; thorax dusky; proboscis 

 black. 



Inhabits near the Rocky Mountains. 



Body with numerous short hairs ; head silvery ; vertex testa- 

 ceous ; antennae pale rufous ; eyes and stemmata reddish-brown ; 

 proboscis black ; thorax dusky cinereous, with two dorsal abbre- 

 viated fuscous lines, and an obsolete intermediate one ; wings hy- 

 aline, immaculate, nervures at base testaceous, towards the tip 

 fuscous ; abdomen and feet testaceous. 



Length to the tip of the abdomen rather more than one-fourth 



of an inch. 



[Vol. III. 



