394 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



anterior angles; the edge recurred, remotely ciliated; anterior mar- 

 gin much less deeply emarginated than in either of the preceding species ; 

 the anterior part of disk convexly a little elevated, polished, mi- 

 nutely rngulose; the remaining surface coarsely punctured, not far 

 from the posterior margin, with a deep, transv^erse, impressed line, con- 

 necting with a faintly impressed, coarsely punctured line running for- 

 ward from just interior to the humeri; at the outer ends of the former 

 impression are two indented more or less distinct dots; posterior mar- 

 gin truncated, the edge narrowly but abruptly decurv^ed ; the lateral 

 angles rectangular. Antepectus polished, having a few small punctures ; 

 the prosternum a little carinated ; the interior edge of the pleural piece 

 also raised. Mesosternum distinctly carinated. Legs dark piceous ; 

 posterior tibiae long and slender; — the anterior legs broken off. Scutel- 

 lum extending not quite two-thirds the length of the venter, acutely 

 narrowing toward the tip, with a transverse hump at base, and a nar- 

 rower, lunate impression behind the hump; polished, minutely punct- 

 ured; the lateral impressed lines broad, shallow, roughly punctured; 

 the tip narrow, acutely rounded, a very little projecting over the mem- 

 brane. Corium a little broader posteriorly, the exterior apical margin 

 more suddenly curved inward than in the other species, the posterior 

 margin moderately oblique, a little convexly curved near the inner 

 angle, the outer angle very blunt, a little prolonged ; surface obsoletely 

 punctured, the sutures distinctly punctured in rows. Membrane pale 

 brownish, hardly half as long as the corium; with three or four very in- 

 distinct nervures. Venter polished, slightly convex; the sides, connex- 

 ivum, and genital segment minutely roughened and punctured ; the 

 connexivum broadly depressed, the edge prominent, trenchant. 



Length 3^ millimeters. Width of pronotum If millimeters. 



Hah. — California. A single damaged female, sent to me by Henry 

 Edwards, esq. 



5. M.f subglaber. 



Stilus suhglaber Walker, British Museum Catal., i, p. 150, No. 17. 



" Black, elliptical, shining, slightly convex. Head thickly punctured, 

 more than half the breadth of the thorax, with a few short bristles. 

 Eyes piceous. Antennae piceous, less than half the length of the body ; 

 first joint and tips of the following joints tawny; joints successively 

 increasing in length. Thorax with rather large punctures, with a few 

 short bristles, and with a distinct transverse furrow across the whole 

 breadth. Scutellum acute, punctured like the thorax ; its length rather 

 more than its breadth at the base. Legs rather robust ; tibite with 

 stout spines; tarsi tawny. Pore wings punctured like the thorax, with 

 two striae near the costa ; membrane pale cinereous. 



"Length of the body If lines. 



" North America. B. Doubleday." 



The description is short, and probably not sufficiently distinctive. 



