132 MEMOIRS ON THE COLEOPTERA 



sinuate and with rather broadly rounded angles; surface rather depressed, 

 flattened or subimpressed latero-basally, the inner impression moderately 

 long but feeble, attaining the base, the outer obsolete, the lateral margins 

 moderate, rather abruptly widening at base; elytra oblong, one-half 

 longer than wide, parallel, with feebly arcuate sides and rather obtusely 

 rounded apex, barely a fourth wider than the prothorax, the striae smooth 

 and unmodified, deeply impressed, the scutellar very short, barely ex- 

 tending beyond the fovea, the intervals rather strongly convex through- 

 out; fovea a little behind the middle, on the left midway between the 

 second and third striae in the type, on the right near the third stria; 

 lateral series of fovese not interrupted; prosternal intercoxal process 

 obsoletely margined at the sides, strongly so about the very broadly 

 obtuse apex; legs moderate, the first two joints of the rather slender hind 

 tarsi strongly grooved externally. Length (cf ) 10.8 mm.; width 4.0 mm. 

 Alaska (Fort Wrangell), Wickham. 



The last abdominal segment of the male has a fine but strong 

 abrupt carina, extending not quite to the base, the summit of which 

 is abruptly and sharply tuberculate at about the centre of the 

 segment, the adjoining surface not impressed. This structure 

 strongly recalls a corresponding sexual character in the compara- 

 tively gigantic species of Holciophorus. The type of this interesting 

 species was found among numerous examples of castaneus Dej., from 

 about the same region; it is a little larger and more parallel, but 

 otherwise presents very nearly the same outward appearance. 



The species described by the writer under the name oscidans, 

 proves to be the same as diligendus Chd. (Lee.) and indeed was so 

 identified by Horn (Ent. Amer., I, 1885, p. 108); the single dorsal 

 fovea had been unobserved in drawing up the original description. 

 Some years subsequently Dr. Horn discovered, through Baron 

 Chaudoir, that the true diligendus of that author, was the species 

 named mancus by LeConte, rendering it necessary to find another 

 name for diligendus Lee. nee Chd. An old MS name of LeConte 

 was thereupon utilized by Dr. Horn for this purpose, and the name 

 of LeConte 's diligendus now appears in our lists under the name 

 apalachius Horn (Lee. MS), wholly disregarding the fact that the 

 name osculans had been given the species by the writer necessarily 

 to this species and none other, as, at the time Dr. Horn gave out 

 his synonymy of osculans, there was no other interpretation of 

 diligendus Chd., than that of LeConte, and also as it truly agrees 

 with that interpretation (Proc. Acad. Phila., 1873, p. 305) in the male 

 sexual characters, which are quite different from those of mancus. 

 The name of the species with synonymy is therefore as follows : 



