2io MEMOIRS ON THE COLEOPTERA 



Elytra cylindrically convex 2 



Elytra notably depressed, broadly and but feebly convex from one side 

 margin to the other; body unusually small in size; erect hairs of the 



elytra shorter than usual and not so conspicuous 7 



2 Basal angles of the prothorax everted and prominent, very acute. 

 Body relatively rather stouter and large in size, very convex, mod- 

 erately dark brown, the elytra pale brownish-rufous; head moder- 

 ately impressed transversely and at the middle of the vertex, opacu- 

 late, rather coarsely, closely punctate; antennae short and slender; 

 prothorax large, very nearly as wide as the elytra, two-fifths wider 

 than the median length, widest slightly behind the middle, the apex 

 only moderately and elliptically sinuate, evidently narrower than 

 the base, the angles not much advanced and slightly acute, not 

 blunt; sides strongly arcuate behind the middle, converging basally 

 and sinuate before the angles; base truncate, broadly, feebly sinuate 

 laterally; surface moderately convex behind the middle and medially 

 thence anteriorly with a distinct impression at each side before the 

 middle, the base somewhat flatter, strongly, closely and perforately 

 punctate, each puncture with a small yellow hair, gradually rather 

 widely and strongly reflexed, coarsely punctate and rugose laterally, 

 the edge thin, granose, the surface opaculate, polished laterally; 

 elytra four-fifths longer than wide, parallel, widest at the middle, 

 the sides very evenly arcuate, the humeri obtuse but not rounded, 

 the apex gradually ogival; surface very convex, steeply declivous 

 behind, very highly polished throughout, the granules very sparse, 

 strong, the setae only moderate in length; side margin thin, serrulato- 

 granose; abdomen convex, shining, finely, sparsely and subasper- 

 ately punctulate and with short pale inclined hairs; legs rather 

 short, strongly rugose and with short stiff inclined pale hairs; pro- 

 sternum coarsely, closely punctate, the propleura much more finely 

 and sparsely; meso- and metapleura with perforate punctures. 

 Length (9 ) 15.7 mm.; width 6.4 mm. California. . . . stricta n. sp. 

 Basal angles of the prothorax acute but never much everted or prominent, 



rarely spiculiform and minutely everted as in tenax 3 



3 Body stouter in form and of larger size 4 



Body slender and generally of smaller size 5 



4 Body stouter than in any other species, brown, the elytra a little 

 paler and more rufous; head rather shining and well impressed, 

 coarsely, perforately, unevenly punctate; prothorax very large, almost 

 as wide as the elytra, fully one-half wider than the median length, 

 the apex much narrower than the base, deeply, circularly sinuate, 

 the angles right; sides strongly, evenly arcuate to the apex and to 

 the basal angles, which are right; base sinuously oblique at the sides; 

 surface subevenly but rather feebly convex, faintly alutaceous, 

 feebly impressed at each side of the middle near the apex, rather 

 coarsely, perforately punctate, densely so on the posterior slope, the 

 sides broadly and gradually, very strongly reflexed, polished, coarsely 

 punctate and rugose, the edge thin and strongly granulo-serrate; 

 elytra evidently widest at two-thirds, three-fourths longer than 



