150 MEMOIRS ON THE COLEOPTERA 



than long, with subparallel and more strongly arcuate sides; surface 

 finely reflexed and feebly punctulate at the sides and with an ex- 

 cessively fine stria, only visible in median half, also with very nu- 

 merous feeble longitudinal plica? at apex and base and some trans- 

 verse wavy lines discally, the foveae extremely feeble and vague, 

 with some very minute rugulosity and a few fine punctures; apex 

 feebly sinuate, the basal angles rather broadly rounded; elytra nearly 

 as in the preceding throughout, except that the punctures at the 

 margin and apex are very much more distinct; abdomen (cf) more 

 sparsely and finely puberulent but having, almost similarly, some 

 remarkable modifications along the middle; the combined first and 

 second segments, or the apparent first segment, has at base between 

 the coxae a minute and densely pubescent spot, and, near the apex, 

 two similar and very approximate spots; the next two segments have 

 each two slightly larger, transversely approximate and sharply 

 limited medial opaque spots, of very dense pubescence; the last 

 segment is without spots; the anterior tarsi are feebly, the middle 

 not at all, dilated, the first joint of both without squamae, the next 

 three with two rows of very small squamules; hind tarsi very slender; 

 in the male of pedicularius the middle tarsi are evidently though 

 not strongly dilated. Length (c?) 5-7 mm.; width 2.1 mm. Missis- 

 sippi (Vicksburg) riparius n. sp. 



14 Head large, fully two-thirds as wide as the prothorax. Body 'oblong, 

 rather convex, shining, obscure piceo-rufous, with black and rather 

 shining though scarcely at all metallic elytra, the under surface 

 anteriorly, epipleura and legs pale testaceous, the hind body nearly 

 black; head with moderate but rather prominent eyes, the slender 

 antennae and palpi pale testaceous, the last joint of the latter obscure 

 but with pale tip; prothorax rather more than one-half wider than 

 long, the sides perceptibly more rounding anteriorly than posteriorly, 

 with very finely, abruptly and evenly reflexed edge throughout; apex 

 feebly sinuate, barely visibly narrower than the base, which is trans- 

 verse, the angles only slightly more than right and but very narrowly 

 rounded; surface with some fine transverse lines medially, otherwise 

 smooth, the biabbreviated stria very fine, the foveae almost com- 

 pletely obsolete but having each, before the base, a very short and 

 sharply linear scratch ; elytra almost one-half longer than wide, ogival 

 in apical third, the obliquity perfectly straight suturally, only a little 

 wider than the prothorax, the striae very fine, the intervals not quite 

 flat, very narrow and convex at apex, the marginal punctulation 

 very fine, almost obsolete medially, the series distinct; abdominal 

 punctures very fine, hind tarsi with the basal joint not quite as 

 long as the next three. Length (9) 5-8 mm.; width 2.2 mm. 

 Colorado scolopaceus n. sp. 



Head only moderately developed, about three-fifths as wide as the pro- 

 thorax, the latter more distinctly narrower than the elytra 15 



15 Form rather narrowly oblong-oval, convex, shining, black, the upper 

 surface with cupreo-aeneous to more obscure metallic lustre, the 

 under surface shining black when mature, with the legs and epipleura 

 obscure rufous; head nearly as long as wide, with moderate and rather 



