136 Coleopterological Notices, III. 



oblong- parallel form and coloration. The two or three basal joints 

 of the antenna? and the palpi, are dark rufo-testaceous. 



M. longllla Lee— Froc. Am. Phil. Soc, XVII, p. 618.— Elongate, sub- 

 parallel, rather strongly, convex, flattened toward the middle, polished, black 

 throughont ; legs and antennje concolorous ; elytra each with a small rounded 

 rufo-testaceous spot at the humerus ; pubescence fine but rather long, sparse 

 but distinct. Head feebly convex, rather coarsely but not very densely punc- 

 tate ; eyes large, separated by but slightly more than their own width ; 

 antennfe robust, about two-fifths as long as the body, the joints generally 

 feebly obconical and one-half longer than wide, third and fourth subequal. 

 Prothorax two-thirds wider than long ; apex subtruucate, two-thirds as wide 

 as the base, the latter transverse ; sides broadly rounded and convergent 

 anteriorly, becoming parallel and nearly straight toward base, the basal angles 

 right, not distinctly rounded ; disk strongly declivous anteriorly and laterally, 

 elsewhere feebly convex, rather coarsely, sparsely, but roughly punctured, 

 feebly impressed in the middle toward base, the basal fovese shallow but dis- 

 tinct. Elytra between four and five times as long as the prothorax, and, 

 throughout, about two fifths wider, the humeri narrowly exposed ; apex 

 rather abruptly and obtusely rounded ; sides parallel and nearly straight ; 

 disk with feebly impressed series of small inconspicuous punctures, the striae 

 not distinct except toward the suture ; intervals throughout with very fine 

 punctures, arranged in more or less even rows. Under surface sparsely 

 finely punctate. Legs rather long, normal, the hind tarsi but slightly shorter 

 than the tibis, with the basal joint nearly as long as the remainder. Length 

 5.5 mm. ; width 1.9 mm. 



Michigan (Detroit). Cab. LeConte. 



The prothorax in general outline is similar to the prevailing type 

 in Hymenorus. The anterior coxae are large, subcontiguous, conoi- 

 dal and prominent, the cavities separated by a very narrow lamina, 

 apparently horizontal and almost completely concealed by the coxae. 



This species is quite isolated, although bearing a remote general 

 resemblance to several others such as tenuis and procera. It is 

 represented, as far as known to me, only by the original unique type, 

 taken by Mr. Schwarz. 



]M. llicolor Coup. — The Canad. Nat., 1865, p. 62. — Oblong-elongate, 

 rather convex, highly polished, intense black above ; under surface, legs and 

 antennae pale rufo-testaceous, the propleurae, epipleurae, metasternal episterna 

 and last two ventral segments blackish ; pubescence short, very sparse, dark 

 and inconspicuous. Head feebly, evenly convex, finely, very sparsely punc- 

 tate ; eyes moderate, rather convex, separated by twice their own width; 

 antennae rather slender, nearly two-fifths as long as the body, the interme- 

 diate joints feebly obconical, more than twice as long as wide, third rather 



