NORTH AMERICAN COLEOPTERA. 43 



N. pavidus n. sp. — Cylindrical, narrower at apical third, dark brown, very 

 slightly shining, sparsely clothed with very short fulvous pubescence ; antennse 

 a little shoi-ter than half the body, paler brown, joint two a little longer than the 

 fourth, third a little longer than the second, but not as long as the fourth and 

 fifth together, fourth very little longer than wide, five to eleven gradually more 

 elongate and very little wider; head convex, very coarsely, roughly punctured, 

 a distinct depression above the base of the clypeus, which is as wide at base as 

 the distance to the eye ; thorax a little wider than long, sides at apical third ar- 

 cuately narrowing to ajiex, posteriorly parallel, hind angles acute, very little 

 prolonged, not carinate, disc convex, a vague median impression, surface very 

 coarsely and roughly punctured ; elytra striate, the intervals flat, slightly con- 

 vex near the base, moderately, densely, coarsely punctured, much less coarse 

 than on the thorax, slightly rugose near the base; presternum shining, rather 

 finely sparsely punctured triangle of propleurfe much more coarsely and densely 

 except near the margin ; the antennal depression is adjacent to the lateral margin 

 in front ; metasternum and abdomen moderately densely and coarsely puuctate, 

 the last ventral very rugose, its apex subacute, but not ])rolonged ; legs pale 

 lu'own. Length .26 inch ; 6..5 mm. 



The above description has been made from one of the two speci- 

 mens used by Dr. LeConte. By the table given by Bon vou loir 

 (Mon. p. 647 ) this species seems most closely related to c-aneaiHa and 

 infu!<cati(s, from ])ot]i of wliieh it differs in form and the mode of 

 punctuation of the prosternum. It has also a pronounced superficial 

 resemblance to Microrhtgu.^ imjtre.^sicol/is. In several of the species 

 already described (Biarti and suspectus) the thorax has the width 

 equal to the length, but the ])resent is the only one known to me with 

 the width greater. 



This species has for its type the Texas specimen referred to by 

 Dr. LeConte (Proc. Am. Philos. Soc. 1878, p. 404), which differs 

 not only by the slight antennal variation, but also in general form 

 and by the antennal depression visible only near the front of pro- 

 pleural triangle. 



One specimen, my cabinet, Texas. 



'X. feres n. sp. — Form slender, cylindrical, narrower behind, i)ale rufo-ferru- 

 ginous, feebly shining, sparsely pubescent; antennae less than half the length of 

 the body, second joint as long as the fourth, third longer, joints four to eleven 

 very gradually increasing in length, each about one-third longer than wide ; 

 head convex, punctuation coarser, rough and variolate, front not impressed ; cly- 

 l>eus at base as wide as the distance to the eye ; prothorax longer than wide, the 

 sides straight and parallel, arcuate slightly at the front angles, disc convex, with- 

 out impressions, the surface coarsely, deeply, densely and roughly punctui-ed ; 

 bind angles very little prolonged, not carinate ; elytra parallel, narrowed only at 

 apical third, striate, the intervals flat, with a single series of coarse and deep, but 

 irregularly placed punctures ; prosternum coarsely not closely punctured, the 

 mucro short, sulcate between the coxae, the propleural triangle more closely punc- 



