314 GEO. H. HORN, M. D. 



width and not attaining the hind angles. At about the posterior fourth of the 

 margin the latter becomes broader, forming a vague depression behind which 

 the margin is not distinctly deplanate. This depression or fovea varies in 

 distinctness, but is never absent as in the preceding species. Length .08 — .10 

 inch ; 2 — 2.5 mm. 



The specimens from Kansas and Colorado have usually entirely 

 pale antennae, although this is by no means constant, a piceous club 

 is often seen on a paler stem. The punctuation of the surface is 

 usually that described in the preceding species, but this is slightly 

 variable also. Specimens from Michigan and New York, are less 

 densely punctured and more shining but still showing more or less 

 of the alutaceous surface. I have tried, but fruitlessly, to separate 

 these forms specifically, but the differences between this and rufi- 

 manus are already so feeble as to prevent me from going any farther 

 in this direction. 



Occurs from New York to Colorado. 



M. seininulnin Lee. — Oval, slightly oblong, black, shining, sparsely 

 pubescent. Head moderately densely punctured. Thorax twice as wide as 

 long, narrower in front, sides posteriorly feebly, in front more broadly arcuate, 

 hind angles obtusely rectangular, margin very narrow not deplanate, surface 

 not densely punctured. Elytra one-fourth longer than wide, slightly narrowed 

 to apex, surface rather sparsely punctured, shining. Body beneath moderately 

 densely punctured. Anterior tibiae finely denticulate, middle and posterior 

 finely spinulose. Length .07 inch; 2 mm. nearly. 



The epistoma is nearly squarely truncate as in rv.fimanus and the 

 tarsal claws simple. It is known from all our species with simple 

 claws and denticulate tibiae by the very narrow thoracic margin. 



With this species I unite that bearing the name ohsoletus in 

 Dr. Leconte's cabinet. It appears less shining than the other but 

 this may result from the better preservation of the pubescence. 

 The two are represented by unique specimens. 



Oregon and North shore of Lake Superior. 



M. pinguis n. sp. — Broadly oval, robust, piceous, feeljly shining, sparsely 

 pubescent, surface moderately densely punctate, the elytra more densely than 

 the thorax. The latter nearly twice as wide as long, narrower in front, sides 

 arcuate, more broadly anteriorly, hind angles obtuse, margin narrow not 

 deplanate, disc convex. Elytra as broad as long, convex. Body beneath 

 coarsely punctate, piceous, legs paler. Anterior tibiae coarsely serrate, middle 

 and posterior tibiae finely denticulate. Tarsal claws distinctly toothed at base. 

 Presternum slightly broader behind the coxae, rounded at tip. Epistoma rather 

 deeply emarginate, tlie lateral angles acute. Length .10 inch; 2.5 mm. 



This species has so many peculiarities that any comparison with the 

 other species is entirely unnecessary. Its broad form is very striking at 

 first sight, the length and breadth are to each other as 10 to 7. 



