282 [February 



terior angles, which are slightly acute. The punctures are very indistinct, the 

 transverse scratches are as fine as in C. californicus. 



7. C.terminans, oblongo-ovalis, minus convexus, nigro-piceus, subtiliter 

 pubescens, elytris distinctius rugose punctulatis, stria suturali profunda, thorace 

 breviore, antrorsum valde angustato, angulis posticis vix productis ; pedibus 

 fuscis, antennis apice flavis, basi testaceis. Long. '12. 



Le Conte, Agassiz' Lake Superior, 218. 



Very abundant at the mouth of the Pic River, on the north side of Lake 

 Superior, under dried animal matter. This species is broader and less convex 

 than the preceding, and is easily known by the more distinct punctuation, and 

 by the absence of the transverse lines. The thorax is densely and finely punc- 

 tulate, it is about twice as wide as its length, strongly narrowed in front, 

 rounded on the sides, especially anteriorly, sligh^y emarginate at apex, trun- 

 cate at base, and very slightly sinuate at the posterior angles, which are scarcely 

 perceptibly acute. The anterior tarsi of the male, and the first joint of the 

 middle tarsi, are dilated. 



By a misprint, the length in the description cited from Agassiz' Lake Supe- 

 rior, is made '15 instead of 12. 



8. C. oblitus, subellipticus minus convexus, rufo-fuscus, pubescens, 

 thorace punctulato antrorsum subangustato, basi truncato, angulis posticis fere 

 obtusis, elytris transversim minus dense strigosis, stria suturali distincta, an- 

 tennis flavis art. 4 10 fuscis. Long. -07 '08. 



Three specimens, Georgia. Easily distinguished by its sub-elliptical and less 

 convex form. I cannot discover any punctures on the elytra ; if they exist, 

 they are concealed by the dense pubescence, which is, however, scarcely seri- 

 ceous. The male has three joints of the anterior tarsi dilated ; the middle 

 tarsi are simple in both sexes. 



9. C. para situs, breviter ovatus, piceo-rufus, sericeus, thorace disco ob- 

 scuriore, brevi, antrorsum valde angustato, angulis posticis non productis, 

 elytris transversim strigosis, stria suturali profunda, antennis basi apiceque 

 flavis. Long. 'OS. 



New York, in ants' nests, with Hetaerius brunnipennis, March and April. 

 This species is much broader and more suddenly narrowed posteriorly than the 

 others. The thorax is fully twice as wide as its length, punctulate, notstrigose, 

 strongly narrow^ed in front, broadly rounded on the sides, truncate at base, wdth 

 the posterior angles simply rectangular and not produced. The elytra are 

 punctulate and distinctly striate transversely. The antennae are as long as the 

 head and thorax, very slightly incrassated, riifo-piceous, with the first 4 joints 

 and the apical one yellowish ; the 7th joint is more than twice the size of the 

 6th ; the 8th joint is much shorter, but scarcely thinner than the following ones. 

 The anterior tarsi of the male are broadly dilated ; the first joint of the middle 

 tarsi is less dilated than in C. terminans. 



The following species are unknown to me: 



C. basill a ri s Say, Journ. Acad. Nat. Sc. 3, 194, Missouri. 



C. cadavorinus Man. Bull. Mosc. 1843, 254. Sitka. 



C h 1 e V a (Catops) Spenciana Kirby, Fauna Bor. Am. 108. 



Colon Herbst, 

 Mylcechus Latr. 



1. C. den tat us, fuscus, oblongus, fulvo-sericeus, valde punctulatus, tho- 

 race latitudine vix breviore, antrorsum magis angustato, angulis posticis vix 

 rotundatis, elytris stria suturali postice profundiore, antennarum clava magna 

 picea, pedibus rufo-piceis, femoribus posticis dente acuto armatis. Long. '09. 



This, the first species of the genus found on this continent, was discovered by 

 the Rev. D. Ziegler, at York, Pennsylvania. The characters above given wiil 

 at once distinguish it from any European species. The thorax is scarcely wider 

 than long, strongly narrowed in front, broadly rounded on the sides, truncate at 



