NORTH AMERICAN COLEOPTERA. 58 



In both Perothops and Ceropliytuni the claws are pectinate, while 

 in all the genera of Eucneniides they are either simple or at most 

 broadly toothed at base. 



PEROTHOPS Eiichs. 



Head moderately convex, clypeus short not inflexed, the labriim continuous 

 and connate with it ; mandibles prominent, arcuate, acute at tip, ciliate exter- 

 nally ; eyes oval, moderately prominent, entire ; maxillary palpi moderately long, 

 the last joint securiform; antennse slightly narrowing the front, arising under 

 rather prominent ridges, the first joint elongate conical, second one-third as long, 

 obconical, third two-thirds as long, fourth longer than second, joints four to 

 eleven differing in the two species, the eleventh truncate at tip ; thorax broader 

 than long, the lateral margin indistinct, hind angles not prolonged ; scutellum 

 oval ; elytra striate ; prosternum slightly lobed in front, the mucro short, the 

 sutures straight, slightly divergent; mesosternal side pieces diagonally divided, 

 equal ; metasternal episternum moderate, parallel : hind coxfe with plates 

 broader internally ; legs moderate, tibia? slightly broader at tip, the spurs small ; 

 tarsi shorter than the tibiae, slightly compressed, the joints obliquely truncate 

 at tip, joints one to four gradually shorter, the first, however, stouter, especially 

 on the posterior pair, claws pectinate their entire length ; body winged. 



Two species are known to me in our fauna. 



Lateral marginal line of thorax visible only near the hind angles; antennal 

 ridges transverse, not meeting on the front ; hind coxal plates more abruptly 

 dilated internally and wider; joints four to nine of antennje gradually longer, 

 ten to eleven equal and a little shorter luticicla. 



Lateral marginal line of thorax visible from the hind angles half way to the 

 front ; antennal ridges oblique, meeting on the front ; hind coxal plates very 

 gradually broader internally ; joints four to eleven of antennse equal in length. 



Wittieki. 



In both species the antennae are slightly flattened externally. 



While there are but two species above, a third is in the " Cata- 

 logus" credited to California, and which is figured by Lacordaire 

 ( Atl. ])1. 41, fig. 8), but not described, under the name cervina. This 

 does not bear the remotest resemblance to either of our species, and 

 I think there must be some error on the part of Lacordaire, as the 

 species mentioned in the Dejean catalogue (third ed. p. 99) is prob- 

 ably our common mi(eida sent to him by Ma_i. LeConte. That cervina 

 Dej. is mucida Gyll. was also the opinion of Erichson (Germ. Zeitschr. 

 iii, p. 117). 



P. iunei<la Gyll. — Form oblong, parallel, piceous % or ferruginous brown 

 9 , feebly shining, sparsely clothed with cinereous pubescence ; head moderately 

 convex, the punctuation intermixed, the coarse sparse, the fine dense; antennae 

 as long as half the body % , a little shorter 9 ; thorax wider than long, narrower 

 in front, the sides feebly arcuate % , or more strongly J . with a slight sinuation 



