30 
PRELIMINARY LIST 
Resthenia confratema Uhl. 
Colorado (Uhle?, 1 and 6). Beaver Brook, August 6th (Uhler, 5). Idaho 
Springs, July 6th (Packard—see Uhler, 5). Colorado (Gillette—see Osborn, 1). 
Resthenia insignis Say. 
Colorado (Uhler, 1 and 6). Colorado, as insignis and as rubrivittata 
(Gillette—see Osborn, 1). 
North Park, July 20th (Gillette). Steamboat Springs, 
July 15th; Rabbit Ears Pass, July 20th(Baker). 
Rejthenia insitiva Say. 
Colorado (Gillette—see Osborn, 1). 
Resthenia inaculicollis Rent. 
Foot-hills twelve miles west of Fort Collins, June 30th 
(Gillette). 
Oncerometopus nigriclavus Rent. 
Colorado (Gillette—see Osborn, 1). 
Dolores, June 18th; Estes Park, July 12th (Gillette). 
Steamboat Springs, July 13th (Baker). Colorado Springs 
(Tucker). 
Oncerometopus ruber Rent. 
Foot-hills five miles west of Fort Collins, September 1st 
(Gillette). 
ZfOpidea conhuens Say. 
Estes Park (Snow). North-east Colorado (Riley). 
ZfOpidea marginata Uhl. 
Colorado (Uhler, 8). 
I^opidea media Say. 
Foot-hills and plains, September 19th and October 4th (Carpenter—see 
Uhler, 6). Plentiful at Denver, Golden, Colorado Springs, and in the valley of 
the Arkansas near Canon City, August 5th to 18th. Occured most frequently 
upon the wild rose bushes (Uhler, 5). August 12th at Cottonwood Creek, 
Pleasant Ualley, Fremont County (Cockerell, 3). West Cliff, Custer County, 
July 31st on Glycyrrhiza lepidota (Cockerell, 10). Colorado (Gillette—see 
Osborn, 1). 
I^opidea nigridia Uhler n. sp. 
“Thicker and more compact than L. media Say, mostly dull black, pubescent, narrowly 
margined with rufo-fulvous or rufous on the outer border of the corium, including most 
of the cuneus. Head a little thicker than typical, dull black, pubescent, with a yellow 
spot on each side of the vertex next the eye, continued slenderly downward, a red spot 
on each side of the tylus, and the cheeks and sides below also red, with black sutures, the 
