52 
PRELIMINARY LIST 
black, dull testaceous beyond the base of the third joint, the basal joint shorter than the 
head, the second rod-shaped, scarcely as thick as the basal one, about as long as the face 
and pronotum united, the third much more slender, about two-thirds as long as the 
second, the fourth about equally slender, a little shorter. Pronotum wider than long, 
with the lateral margins oblique; the front margin with a pale collum, reaching to the 
middle of the eyes; middle surface behind the collum uneven and depressed between the 
large oblique callosities; lateral margins reflexed, slender, pale; the humeral angles 
subacute and pale; disk a little wrinkled, not distinctly punctate; pleural flaps polished, 
black, with the segment next behind marked with a large greenish spot. Coxae mostly 
greenish-white, femora flattened, testaceous, more or less piceous towards the tip, but 
always omitting the apex of the posterior pair; tibiae testaceous with black knees, spines 
and their bases; tip of tarsi piceous. Scutellum obsoletely scabrous, acute at tip. Glavus 
black, roughly wrinkled and a little punctate; corium pale testaceous, or ivory white, 
marked with a large, somewhat ovate, ragged spot from before the middle to next the 
tip; cuneus pale with a small black spot at tip; membrane dark fuliginous with a large, 
clear spot on the middle, veins testaceous. Abdomen black, polished, the base more or 
less greenish, and the incisures of the connexivum slenderly bordered with greenish. 
Length to end of abdomen 4.5 mm. To tip of membrane 5 mm. Width of pronotum 
1.5-1.75 mm. Described from three specimens, including both sexes, sent to me from Colo¬ 
rado. This species is more robust and less tender than P. obscurus. It also lacks the 
yellow marking of the scutel, and has the callosities oblique, widely separated, and the 
collum yellow or greenish.” 
Steamboat Springs, July 12th, on Solidago, Delphinium 
occidentale, and other low herbs (Baker). 
Plagiognatlius obscurus Uhl. 
Colorado (Uhler, 1 and 6). West Cliff, Custer County, July 27th (Cockerell, 10), 
Fort Collins, September 27th, on Bigelovia (Gillette). 
Plagiognatlius politus Uhler n. sp. 
‘‘Black, narrow, oval, highly polished, the sides of hemelytra but little wider behind 
than anteriorly. Head short, acute at tip, including the eyes, but little wider than the 
front of pronotum, base with a pale yellow carina; front moderately convex: tylus wide, 
prominent; rostrum flavo-piceous, reaching upon the middle coxae; antennae long and 
slender, black, the basal joint thickest, the second as long as from the front of the eye to 
the base of the pronotum, the third more slender, about two-thirds the length of the 
second, pale piceous or yellowish, the fourth equally slender, of the same color as the 
third, and about one-half the length of the second. Pronotum a little wider than long, 
faintly wrinkled, with the transverse impression interrupted and faint on the middle 
continued to a sinus inward from the lateral margin; the lateral margins oblique, turned 
down, sharply defined, with the interior angles rounded; posterior margin gently curved; 
the humeral angles subacute. Scutellum convex, a little longer than wide, acute at tip. 
Femora piceous black, the anterior ones pale at tip, coxae, in part and tibiae testaceous, 
the spines and their bases black, tip of tarsi piceous. Olavus highly polished, remotely 
and coarsely punctate and wrinkled; corium more minutely scabrous and obsoletely 
punctate, very highly polished, the callous linear apex of the inner border testaceous, 
the membrane dusky brown with the vein pale yellowish. Abdomen black, highly 
polished, obsoletely scabrous. 
Length to end of abdomen 3 mm. Width of pronotum 1.25 mm. Only one specimen, a 
female, was sent to me from Colorado. A variety with yellow face and a pale lunule at 
base of the cuneus was collected near Buffalo, N. Y., by Mr. \anDuzee. The type from 
Colorado has also a faint, very narrow, curved band at base of cuneus.” 
Fort Collins, July 24th (Baker). 
Atonioscelis seriatus Reut. 
Fort Collins, September 27th, on Bigelovia (Gillette). 
