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 efjually slender, a little shorter. Pronotum wider than long, 

 with the lateral margins eblique; tlie front margin with a pale collum, reaching to the 

 middle of the eyes: middle surface behind the collum uneven and depressed between tlie 

 large obliciue 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 

 iilways 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. Clavus 

 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 p;i,le 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 conne.xivum slenderly bordered with greenish. 



Length to end of abdomen 4.5 mm. To tip of membrane 5 mm. AVidth of pronotum 

 l-.l-l.TS 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 r2tli, on Soliclago, Delphinium 

 occidentale, and other low herbs (Baker). 



Plagiognathiis obscurus Uhl. 



Colorado (Uhler,! and T)). WestClitf, Custer County, July 27th (Cockerell, 10).. 



Fort Collins, September 27th, on Bigelovia (Clillette). 



Plagiognathiis politiis Uhler n. sp, 



"Black, narrow, oval, higlily polished, the sides of hemelytra but little wider behind 

 ilian 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. Clavus 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 :! 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. VanDuzee. The type from. 

 Colorado has also a faint, very n;irrow, curved band at base of cuneus.' 



Fort Collins, July 24th (Baker). 



Atomoscelis seriatus lieut. 



Fort Collins, September 27th, on Bigelovia ((.Tillette) . 



