392 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



with two round, sunken points each side neai- the anterior edge 5 the 

 surface a little ronndedly declining each side, the disk almost flat, ante- 

 riorly impnnctnred; behind the middle with fine, remote, elongated punct- 

 ures, minutely rugulose ; each side coarsely, closely punctured, obso- 

 letely longitudinally impressed, and with a larger sunken point in the 

 midst of the punctures ; transverse line obsolete, or absent ; posterior 

 margin abruptly decurviug, smooth, impressed just interiorly to the hu- 

 meri ; humeri a little elevated, convex. Scutellum longer than broad, 

 acutely narrowing toward the tip, hardly sin uted; the base rouudedly, 

 transversely elevated; at t!ie base of this elevation an acutely impressed, 

 slender, punctured line; behind the elevation, the surface is a little de- 

 pressed, each side with the submarginal groove coarsely punctured ; 

 surface faintly rugulose, coarsely, remotely punctured, more finely and 

 obsoletely so at tip ; the tip acutely rounded, faintly impressed, the 

 lateral edges a little upturned. Corium rafo-piceous, the elevated 

 seams black ; distinctly, a little remotely, punctured, obsoletely so upon 

 the disk and costal space, excepting the base of the latter, which is 

 distinctly punctured; the sutures each side of discoidal field finely dis- 

 tinctly punctured in lines; the posterior margin rather bluntly oblique, 

 the exterior corner a little bluntly prolonged ; costal margin curving 

 inward toward the tip. Membrane hardly half as long 9S the corium ; 

 wliite, very faintly tinged with brown. Legs dark piceous, or rufo- 

 piceous, normal ; the anterior tibiae with few spines ; tarsi testaceous, 

 or pale ferruginous. Venter smooth on the disk ; the sides minutely 

 wrinkled, and, together with the genital segment, closely punctured, the 

 last ventral segment transversely minutely wrinkled. Connexivum 

 tolerably broad, flattened, the edge trenchant. Embolium long, taper- 

 ing to a slender point, broadly, longitudinally impressed, minutely rugu- 

 lose, with a few punctures near the base. 



Length 3-3^- millimeters. Width of pronotum barely 2 millimeters. 



Hah. — Pennsylvania, in May. A single specimen was kindly given 

 to me by Prof. S. S, Haldeman. I obtained a second specimen while 

 collecting with Br. F. E. Melsheimer, in York County, Pennsylvania. 



3. M. spinokv. 



JEthus spinolcB Signoret, Anu. Soc. Eat. France, 1863, p. 545, 12. 

 Elongate-oval, piceous-black, polished, the sides almost parallel. 

 Head convexly inclining in front, the margin more triangularly rounded 

 than in either of the preceding species, the edge not apparently recurved, 

 remotely ciliated ; the tylus broad and long, a little longer than the 

 lateral lobes, faintly rugulose; the cheeks faintly rugulose, each side near 

 the front margin with a sunken point, and near each eye two smaller ap- 

 proximate sunken points. Antennae ferruginous or pale piceous; sec- 

 ond joint the most slender, a little longer than the third ; the third a 

 little stouter, shortest ; fourth a little longer than the second; fifth long- 

 est. Rostrum ferruginous, scarcely attaining to the middle coxae ; second 



