422 GEOLOGICAL SURVEY OF THE TERRITORIES. 



Family Yeliid^. 

 Macrovelia^ Uliler. 



General form of 3Iicrovelia, Westwood, but mucli 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, subequal 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 coxce ; the 

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

 times as long as the apical one. Thorax subcylindrical, wi(lened 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. 



M. Rornii. New species. — Fulvous, or reddish-brown, finely pubescent; 

 the cranium bounded each side against the ej^es by an impressed, oblique 

 line, on the inner margin of which is a blunt, fointly 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 bucculae. Eyes dark brown. Antennae yel- 

 lowish-testaceous ; the ends of the joints darker, and the two ai)ical 

 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-posterior margins siuuated 

 and the edge recurved. Pectus black, with the margins of the i)leural 

 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 

 l)aler near the tip. Connexivum i)ale, with a dark spot at the tip of 

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

 sui)eriorly, 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 J millimeters. 



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

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

 fornia and Arizona. 



Family HYDROiNiETRrD^. 



Hygrotrechus, StM. 



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

 Colorado, and Koss Fork, Idaho. 



