26 
PRELIMINARY LIST 
Colorado as well on plains and foot-hills as in mountains. Near Denver and 
also in Clear Creek Canon, August 6th (Uhler, 5). Summit of Arapahoe Peak, 
13,000 feet, July 14th (Packard—see Uhler, 5). Custer county, midalpine 
(Cockerell, 10). Colo. (Gillette—see Osborn, 1). 
tort Collins, February 19th to April 16th; Spring Canon, 
March 12th (Gillette). 
Peritrechus frater mis Uhl. 
Ula, Custer county, November 12th (Cockerell, 10). 
RhyparocJiromus ftoralis Uhler n. sp. 
•Long-elliptical, rusty fulvous, opaque, minutely sericeous pubescent. Head piceous 
paler or rufo-fulvous at tip, subconic, nodding, smooth, shorter than the pronotum, 
minutely scabrous, strongly convex above, with the throat pale rufo-fulvous; antennae 
stout, about as long as the pronotum and corium united, dull fulvous, pale pubescent, 
with the fourth joint and apex of the third blackish piceous, the basal joint extending a 
little beyond the tip of the head, second much longer, the third about one-half longer but 
a little shorter than the second, the fourth about equal to the second; rostrum reaching 
upon the middle coxae, slender, pale fulvous, with the apical joint black. Pronotum sub° 
quadrangular, a very little wider at base than at tip, fulvous or rufo-fulvous, dull testa¬ 
ceous and punctate with black on the basal one-third, the lateral margins a little reflexed, 
black, slightly convexed next the apical angle, the submargin ivory white, expanding 
posteriorly where it abuts against a tumid black humeral spot, the inner boundary of 
this stripe and the anterior submargin finely punctate with black, disk not distinctly 
punctate, behind this is a feebly raised whitish line. Scutellum very long and acute 
fulvous, transversely indented on the middle, finely punctate before the middle and 
corsely punctate with black towards the tip, the middle line more or less black. Corium 
whitish testaceous, with about nine slender black oblique lines (including the clavus) 
which are mostly composed of impressed punctures, the costal border and a transverse 
spot upon a wide black area, which also covers the cuneus, dull white, exterior reflexed 
edge of costal border dark brown; membrane smoke brown, with a short white spot next 
the tip of cuneus, and a double fainter one at tip. Legs pale fulvous, pale on middle of 
tibiae and base of tarsi, apices of tibiae and tarsi piceous. Pectus dark rust brown, paler 
anteriorly, the segments on the posterior border and a spot above each of the coxae 
pale yellow. Venter dull black, bordered above with testaceous or fulvous. 
Length to tip of venter, 6-6.5 mm. Width of pronotum, 1.75-2 mm. This seems to be a 
common species in Colorado, Montana, California, etc.” 
Abundant at Fort Collins, throughout the season, under 
stones, etc., usually in company with Formica neoclara Em. 
(Baker). 
Rhyparocliroiiius ( Dorachosa ) illuminatiis Dist. 
Dixon’s Canon, February 28th, under a stone (Baker). 
premocoris ferns Say. 
Custer county, midalpine (Cockerell, 1C). Colo. (Gillette—see Osborn, 1). 
Dolores, June 16th (Gillette). 
Rremocoris tropicus Dist. 
Fort Collins, March 26th; foot-hills five miles west of Fort 
Collins, March 15th and 16th (Gillette). 
