Coleopterological Notices, III. 167 



C. amoena Say.— Journ. Ac. Phil., Ill, 1823, p. 268 (Chromatia Lee). — 

 Oblong-oval, rather depressed, black and polished throughout, the prothorax, 

 under surface and legs pale rufo-testaceous ; pubescence extremely short, fine, 

 rather sparse and inconspicuous. Head rather strongly, longitudinally im- 

 pressed in the middle toward base, minutely, strongly, rather densely punc- 

 tate, the punctures distinctly separated ; eyes moderate, separated by at least 

 one-third more than their own width ; antenna? very stout and compressed, 

 rather less than one-half as long as the body, serrate, the joints distinctly 

 longer than wide, third joint nearly twice as long as the second and rather 

 more than one-half as long as the fourth. Prothorax short, transverse, rather 

 more than twice as wide as long, the apex truncate in the middle, broadly 

 rounded thence laterally along the sides, the latter becoming more or less 

 feebly divergent and feebly arcuate from apical third to the basal angles, the 

 latter right ; base transverse, the sinuations very small, narrow and feeble ; 

 disk more or less explanate laterally, feebly impressed in the middle near the 

 base and in the position of the basal fovese, minutely and rather sparsely 

 punctate. Elytra four times as long as the prothorax, and, at or behind the 

 middle, quite distinctly wider than the latter, rather obtusely ogival at apex ; 

 sides subparallel, very feebly arcuate, not quite continuous with those of the 

 prothorax, the humeri obliquely rounded externally ; disk with rather coarse, 

 deeply impressed strise of distinct, close-set punctures, the intervals feebly 

 convex, finely but strongly, densely and very distinctly punctate. Abdomen 

 minutely, feebly, rather sparsely punctate ; propleurse excessively finely, 

 sparsely so. Legs decidedly short, rather robust ; basal joint of the hind 

 tarsi distinctly shorter than the remainder. 



Male. — Similar to the female in form and size ; antennae much stouter, a 

 little more than one-half as long as the body, the joints but slightly longer 

 than wide, the third extremely short, wider than long, similar to the second 

 and scarcely more than one-fourth as long as the fourth ; eyes separated by 

 one-fourth more than their own width ; anterior tarsi a little thickened or 

 subdilated toward base, with the basal joint nearly as long as the next two 

 combined ; fifth ventral short, broadly truncate at apex, with a broad shallow 

 median canaliculation which becomes wider toward apex ; genital armature 

 deeply bilobed, the lobes lamelliform, moderate in length. 

 Length 6.8-7.8 mm. ; width 2.6-3.4 mm. 



New York ; Kentucky ; Indiana. 



The above description refers to the female. In one specimen the 

 elytra are colored exactly as in marginata, each elytron being sur- 

 rounded completely, except at base, with a fine testaceous margin. 

 This species will assuredly be considered the representative of a sub- 

 genus when the entire genus can be investigated, but at present 

 there are no better grounds for separating it than in the case of 

 marginata, or the Central American nigricornis, the latter being 

 quite closely allied to amoena in its short legs and form of the pro- 

 thorax. 



