422 GEOLOGICAL SURVEY OF THE TEEEITORIES. 



Family YeLiidje, 

 Macrovelia, Uhler. 



General form of Microvelia, Westwood, but much more elongated. 

 Head long and narrow, subconically narrowing toward the tip; the 

 division before the eyes several times longer than that behind them ; 

 cranium arched, curving downward ; the tylus short, forming a narrow, 

 blunt carina at the anterior extremity. Antennae slender, reaching 

 beyond the tip of the scutellum ; the basal joint stoutest, narrowed at 

 base, a little curved ; second a little shorter, stout, enlarged toward the 

 tip ; third and fourth very slender, siibequal in length to the basal one. 

 Eyes round, placed on the sides a little below the upper line of vertex 

 and near the occiput. Ocelli in contact with the inner margin of the 

 eyes. Eostrum very slender, reaching beyond the interior coxse ; the 

 basal joint very short, ring-like; the second joint very long, about three 

 times as long as the apical one. Thorax subcylindrical, widened behind, 

 bilobate by reason of a transverse constriction before the middle ; the 

 anterior lobe with a tumid callosity each side ; collum distinctly defined; 

 humeral angles knob-like, posterior margin of pronotum scutellum-like, 

 the .tip bluntly rounded. Hemelytra narrower than the abdomen ; the 

 corium narrow, and with the membrane occupying also its inner margin. 

 Legs long and slender. 



31. Sornii. Kew species. — Fulvous, or reddish-brown, finely pubescent ; 

 the cranium bounded each side against the eyes by an impressed, oblique 

 line, on the inner margin of which is a blunt, faintly elevated, oblique 

 carina ; the middle line slender, fuscous; cheeks and gular surface black- 

 ish ; the space behind the eyes transversely tumid, the ridge joining 

 inward to the slender carina, which runs along the whole length and 

 forms a substitute for the bucculse. -Eyes dark brown. Antennae yel- 

 lowish-testaceous ; the ends of the joints darker, and the two apical 

 joints a little infuscated. Pronotum bright fulvous, coarsely, remotely 

 punctured with fuscous, each side of the middle of the anterior lobe 

 and disk, with a feebly elevated, longitudinal line ; just behind the col- 

 lum are two very slightly elevated, approximate tubercles ; sides before 

 the posterior lobe emarginated, the latero-xoosterior margins sinuated 

 and the edge recurved. Pectus black, with the margins of the pleural 

 segments fulvous. Legs pale yellow ; the knees, tips, and a cloud upon 

 the femora and the tarsi, dusky. Hemelytra in the fully winged, fus- 

 cous, silvery pubescent, with a large white spot at base, the costal mar- 

 gin and sometimes the inner margin of corium blackish; membrane 

 paler near the tip. Oonnexivum pale, with a dark spot at the tip of 

 each segment; venter pale fulvous, densely golden pubescent, the sides, 

 superiorly, with a broad, blackish stripe not quite reaching to the tip. 

 The short-winged form has the hemelytra dark brown, with a streak of 

 white at base. 



Length, 4-5 millimeters ; width across the humeri, 1-1^ millimeters. 



Obtained at Fort Defiance, IsTew Mexico. The species is named after 

 Dr. George H. Horn, to whom I am indebted for specimens from Cali- 

 fornia and Arizona. 



Family Hydrombteid^. 



ffygrotreclms, Stai. 



H. remigis, Say, (Hemipt., New Harmony, p. 35^ No. 2.) — Brought from 

 Colorado, and Koss Fork, Idaho. 



