GEOLOGICAL SURVEY OF THE TEREITORIES. 413 



Lygus, Halin. 



1. L. Uneolaris, Palisot de Beauv., (Ins. Afr. et Amer., p. 187, pi. xi, 

 Fig'. 7.) Capsiis oblineatus, Say, (lleteropt., New Harmony, p. 21, No. 7.) — 

 Obtained in Colorado. It inhabits almost tlie whole territory of the 

 United States, and is common in Canada and British America. The speci- 

 mens from the western sections exhibit a number of dark varieties thus 

 far not met with on the Atlantic slope of the continent. This species 

 includes the two extreme races to which I had provisionally given the 

 names L. redimitus and L. d4ffusus; but these names must be dropped, 

 as thus they do not belong to true s'pecies. A specimen was collected 

 at Cheyenne in August, 1870. 



2. L. annexus. New species. — Closely allied to the preceding species, 

 but having the pronotum longer and narrower and the punctures closer 

 and finer. Fusco-griseous, or grayish-testaceous, sericeous pubescent. 

 Head minutely, sparingly punctured, indented on the middle of the 

 vertex; testaceous, with the tylus and each side of face piceous, or 

 piceous with a, median yellow stripe and with marks of yellow each side of 

 the tylus; occiput with a transverse carina. Antennse slender, piceous, 

 or black, or even pale rufo-piceous, with the ends of the joints darker, 

 .the apical joint much shorter than the preceding one. Eostrum reach- 

 ing to the posterior co±ss, testaceous, with a black apex. Pronotum 

 blackish-x>iceous, or grayish-testaceous, coarsely rugose, closely and 

 somewhat finely punctured between the rugse; the lateral margins feebly 

 sinuated; the posterior margin arcuated, testaceous; callosities smooth, 

 prominent ; the coUum distinctly defined, testaceous. Propleura piceous, 

 rugose, and closely punctured ; the inferior margin pale yellow ; pectus, 

 coxse, and base of femora pale yellow; the upper part of pleurae having 

 a broad black stripe, which is continued along the venter to the tip. 

 Femora dusky or piceous at tip ; the tibise more or less suffused with 

 l^ale piceous ; the tarsi'and nails dark piceous. Scutellum rufo-piceous, 

 piceous, or grayish, densely yellowish pubescent, transversely wrinkled, 

 and having only a very few obsolete punctures; the tip smooth, pale 

 yellow. Hemelytra very minutely scabrous, obsoletely punctured, 

 closely yellowish pubescent; the costal margin straight, color brownish, 

 piceous, or testaceous, clouded with brown on the disk and clavus ; the 

 inner apex of the corium having a thickened, short, linear, whitish mar- 

 gin ; cuueus long, testaceous, with a dusky tip, sometimes suffused with 

 .rufous; membrane very long, smoke-brown, with the nervule pale testa- 

 ceous. Venter testaceous, smooth, shining, closely pubescent, the last 

 segment more or less piceous. Sometimes all beneath, except the i^rop- 

 leura, is pale testaceous. $ ? . 



Length to tip of venter, 4^-5 millimeters. Width across the humeri, 

 l|-2 millimeters. 



Collected in Colorado. 



Dacota, Uhler. 



Allied to PoJymerus, Fieber. Form long-ovate; head declining ante- 

 riorly, longer than wide, and together with the eyes only a little wider 

 than the front of the pronotum; the tylus narrowing almost to an acute 

 tip; eyes large, oval, almost vertical; the superior cheeks with a recurved 

 lower margin; bucculse forming a narrow strip along the anterior half 

 of the gula. Apical joint of rostrum long and very slender; antennse 

 as long as the thorax and abdomen united ; the first joint longer than 

 the head, constiicted at base ; the second about three times the length 



