410 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



synonymy of this species and its allied forms. Some links pointing to 

 a connection with. G. pallens, horecdis, and disoopterus have already been 

 procured, and doubtless still others will occur when closer attention is 

 given to collecting them. Occasionally, they may be swept with the net 

 from low bushes and weeds near woods and streams, on the hill-sides, 

 and in the mountains; and elsewhere they will be found near the roots of 

 plants and among small stones in sandy places. The darker-colored 

 ones affect the dark sandy loam formed by the grinding currents of the 

 rapid streams in the caiions and gulches. 



2. G. uliginosus. 



Salda nliginosa Say, Heteropt New Harmony, 19, No. 3. 

 OpMlialmicus niger Dallas, Brit. Mus. List Hemipt., ii, 586, No. 9. 

 Oplithalmicus lateralis Fieber, Wien. Entom. Monats., v, 271, No. 9. 



This is the commonest species found in the Atlantic region. It occurs 

 on the ground in dark loamy spots, in woods and near streams, often in 

 places exposed to the sun, and around the roots of Solanum carolinense. 



Only a very few specimens have thus far been brought from the region 

 near the Rocky Mountains. I obtained one specimen from Denver, 

 August 5. 



3. G, decoratus, new sp. 



Narrow-subovate; prevailing color black, polished. Head wider than 

 the pronotum, the eyes obliquely very prominent, brown, large ; face 

 deep black, very closely and finely punctate, the apex of the tylus and 

 cheeks pale yellow ; antennoe slender, black, the joints terminated with 

 white, the apical joint dusky; rostrum reaching to the posterior coxae, 

 piceous-black. Pronotum transverse, very slightly narrower in front, the 

 sides of the anterior margin obliquely truncated, with the angles scarcely 

 rounded, black, very coarsely punctate, almost flat, the anterior edge 

 and a small spot on its middle, the lateral margin, the humeral angles 

 broadly, and a large spot on the middle of the posterior margin ivory- 

 like and pale yellow ; callosities transverse, impunctate, highly polished, 

 and deep black. Sternum and pleural pieces deep black, the latter 

 polished, less coarsely, but densely, in part confluently, punctate; a 

 quadrangular spot above each acetabular cap, the osteole and the apexes 

 of the coxae white, gular collum white ; femora blackish-piceous, 

 testaceous at tip ; tibiae dusky at base, the remainder and the tarsi 

 paler, with the tip of the apical joint and the nails piceous. Scutellum 

 black, coarsely and moderately closely punctate, the margins, particu- 

 larly at tip, tinged with testaceous. Hemelytra pale yellowish, punctate 

 with brown, and with a brown cloud on the disk posteriorly, and two 

 brown streaks on the posterior margin ; membrane short, white. Abdo- 

 men black, very minutely punctate and pubescent. 



Male generally paler, with more whitish-yellow on the front of the 

 face; the whole basal half of pronotum pale; the legs yellow, pointed 



