376 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



a little convex, somewhat finely punctate, the base almost impiinctate ; 

 the margin posteriorly broadly excavated, and near each eye and at the 

 basal angle of thetylus is a small round pit; ocelli red, placed remotely 

 from each other and a little behind the front line of the eyes. Kostrum 

 ferruginous or pale piceous ; the second joint much compressed, long. 

 Antennae moderately stout ; the second joint scarcely one-half as long 

 as the third ; the third gradually enlarged toward the tip ; the fourth 

 and fifth subequal, long-oval. Pronotum narrowing anteriorlj^ ; the 

 sides oblique, curving inward at the prolonged anterior angles, smooth, 

 finel}' and closely punctate, excepting the anterior part of the disk ; the 

 anterior margin deeply sinuated ; the collum narrow, smooth, but dis- 

 tinctly defined ; the outer margins remotely ciliated ; posterior angles 

 direct, not tumid, with steep sides ; .the intra-humeral impressions obso- 

 lete. Pectus rufo-piceous, smooth, impunctured, darker on the posterior 

 pleural pieces. Legs and coxse flavous, or pale rufo-piceous ; the ante- 

 rior tibiae very moderately compressed, armed exteriorly with about six 

 dark spines ; the spines of the posterior tibiae stout, long, rather remote, 

 black-piceous ; the tarsi testaceous, their middle joint very short. Scu- 

 tellum a little flattened, polished, and impunctured on the disk; the 

 remaining surface closely punctate, minutely rugulose ; the edge very 

 narrowly recurved ; the tip faintly impressed, obsoletely carinated. Co- 

 rium wide, moderately convex, smooth, coarsely, closely punctate, on the 

 disk obsoletely punctate ; the posterior margin feebly sinuated, fur- 

 nished with a thinner border, and with the outer angle a little produced. 

 Embolium broad, reaching to the second ventral segment, longitudinally 

 scooped out, minutely scabrous. Membrane brownish-white, a little 

 declivous posteriorly. Yeuter polished, minutely shagreened, and 

 wrinkled each side and behind ; the genital segment almost vertical, and 

 crowned with a few erect bristles ; the margins of the connexivum with 

 a few remote bristles. 



Length 3^-4 millimeters. Width of base of pronotum 2-2^ millime- 

 ters. 



From the vicinity of San Francisco ; collected by Messrs. Henry Ed- 

 wards and James Behrens. One specimen has been obtained in the 

 vicinity of Baltimore. 



HoMALOPORUS, new genus. 



Ovate; sides of pronotum oblique, remotely ciliated, curving almost 

 abruptly inward at the anterior angles, the angles a little prolonged ; 

 anterior margin moderately deeply sinuated, furnished with a narrow 

 iiat collum, which extends distinctly to the outer angles, and is defined 

 by a clean-cut, deep line bearing two indented points behind each eye; 

 surface rather flat, more convex on the anterior lobe, the transverse line 

 distinct, narrow, abbreviated each side, terminating in a sunken point 

 before the submargin, and each side of tip, anteriorly, with an indented 

 point ; the posterior margin slightly arcuated, a little sinuated near the 



