56 Coleopterological Notices. 



and rather more than one-third wider than the prothorax, feebly impressed 

 near the suture toward base, rather finely punctate, the punctures ^listinut, 

 rather smaller than those of the prothorax, and separated by nearly twice their 

 own diameters. Abdomen slightly narrower than the elytra, gradually wider 

 from base to apex, finely, somewhat densely punctate, beneath polished, finely, 

 somewhat densely punctate. Length 3.3 mm. 



Illinois; Iowa. 



The description is taken from the male, and the sexual characters 

 at the apex of the abdomen are, as usual in tlie semiferrucjineus 

 group, very strongly marked, in this case more remarkable than in 

 any other species which I have seen, and reminding us somewhat 

 of the male modification in Apocellus. 



The sixth segment is broadly, strongly emarginate in circular arc 

 nearly throughout the width, the emargination bordered with a 

 wide and thin, very slightly inflexed membrane ; at each side of the 

 emargination there is a small, acute, pointed tooth ; the seventh 

 segment is slightly produced and rounded in the middle, the eighth 

 as usual obliquely divided, the two overlapping portions having an 

 acute apical incisure, which can apparently be varied at will. 



The hypomera are wide, flat, the suture distinct; the coxal fissures 

 very short, almost completely closed ; the mentum shining, reticu- 

 late, ver}' feebly, transversely impressed near the base. The species 

 should be placed immediately after nitidicoUis Lee. 



Group 4. — annularis. 



This group is by far the most extensive of the genus ; the species 

 may be provisionally arranged in the following order: — 



punctatissimns Leo. ruficornis Leo. 



villosus n. sp. languidus n. sp. 



laticollis Lee. bicolor n. sp. 



nebulosus n. sp. divisus Lee. 



longipennis Miikl. pleuralis Lee. 



luteipennis Lee. diagonalis Lee. 



monticola n. sp. Ijarvicollis n. sp. 



sinuatus Lee. tau Lee. 



gentilis n. sp. ornatus Lee. 



gracilis n. sp. suturalis Lee. 



annularis Lee. phytosinus Lee. 



stabilis n. sp. cognatus Lee. 



confusus Lee. emarginatus Say. 

 adustus n. sp. troglodytes Er. 



honestus n. sp. 



