i66 MEMOIRS ON THE COLEOPTERA 



where they are very short and obtuse. The few known species 

 may be described as follows: 



Hind angles of the prothorax not in the least prominent or acute. Body 

 rather feebly ventricose, deep black, opaque above, rather less so 

 beneath; head broadly, deeply impressed transversely, the im- 

 pression abruptly terminating at each side in the precipitous straight 

 inner walls of the lateral prominences, the punctures moderate and 

 not dense, the hairs short and very stiff; antennae rather longer 

 than the head and prothorax, somewhat stout, scarcely at all com- 

 pressed; prothorax fully as long as wide, the subparallel sides mod- 

 erately and very evenly arcuate from the basal angles nearly to the 

 apex, where they become sinuate behind the very narrow and ante- 

 riorly much produced, acute apical angles; apex deeply sinuate, 

 narrower than the base, the latter broadly, evenly bisinuate, the 

 basal angles right, not blunt and not at all everted; surface strongly 

 gibbous medially, abruptly and very narrowly concave along the 

 margins, which are rather thick and feebly crenulate, the median 

 line narrowly and deeply impressed but only at the summit of the 

 gibbosity, the base not at all impressed; punctures not very fine, 

 strongly asperulate and dense throughout, each with a short and very 

 stiff but simple recurved dark fulvous seta; elytra fully one-half 

 wider than the prothorax, three-fifths longer than wide, widest at the 

 middle, gradually acute behind and moderately declivous, the sides 

 parallel and evenly arcuate to the basal angles, which are obtuse 

 but not blunt, the base transverse, sinuate at and near the rather 

 small scutellum; surface flat or nearly so, with small punctures con- 

 densed into regular lines suturally but more dispersed laterally, 

 each puncture bearing a broad recurved piceous scale-like seta, 

 the lateral margin finely but strongly cariniform, abruptly ending 

 near the apex, each having also a strongly cariniform discal costa, 

 beginning behind just above the end of the marginal ridge, gradually 

 approaching the latter anteriorly and fusing gradually with it just 

 before the middle; abdomen strongly, densely, asperately punctate; 

 legs rather short and very slender. Length 16.0 mm. ; width 7.0 mm. 

 Lower California. [Pelecyphorus bifuirus Lee.] bifurca Lee. 



Hind angles of the prothorax finely acute and strongly everted, very 

 prominent; dorsal ridge of the elytra joining the hind margin, not 

 near the middle as in the preceding, but at base, much less marginal 

 in position 2 



2 Body black, opaque, sparsely clothed with short sordid hairs; head 

 and prothorax strongly, densely punctate, the latter longer than 

 wide, moderately and equally narrowed anteriorly and posteriorly, 

 the sides broadly rounded, subcrenate posteriorly, the margin re- 

 flexed; anterior angles produced, acute, the posterior acute and di- 

 verging; base bisinuate; surface broadly and deeply canaliculate; 

 elytra ovate, obliquely attenuate posteriorly, one-half wider than 

 the prothorax, more finely punctate, the lateral margin and a dorsal 

 costa on each acutely elevated and uniting at the humeri, the 



