NORTH AMERICAN COLEOPTERA. 285 



angle obtusely rounded, disc moderately convex, surface distinctly alutaceous, 

 punctuation sparse, fine and obsolete. Body beneath a little darker than above. 

 Abdomen shining, sparsely indistinctly punctate. Legs yellowish testaceous, 

 posterior femora sparsely obsoletely punctate. Length .07 -.08 inch. ; 2 mm. 



This specie.s makes the nearest approach in form to the apterous 

 forms by the rather narrow elytral base and rounded humeri, but 

 the umbone is quite distinct and the body winged. The base of the 

 thorax is without marginal line. The distinctive characters of this 

 species are in form of the antennae, the color and the character of 

 the surface and punctuation. 



Occurs from Penn.sylvania to Georgia. 



17. Id. iiielsiiiurus Mels. — Oblong oval, moderately convex, brownish, mod- 

 erately shining. Antennae slender, rufotestaceous, outer five joints darker. 

 Head minutely alutaceous, impunctate. Thorax slightly wider than long, not 

 nai-rowed in front, sides feebly arcuate with a slight angulation at middle, apical 

 angles obliquely truncate, with distinct post apical angulation, disc moderately 

 convex, very di.stinctly alutaceous and slightly wrinkled near base, punctuation 

 moderately coarse, but very indistinct, especially near apex. Elytra a little 

 wider at base than thorax, humeri rounded, umbone distinct, form regularly 

 oval, widest at middle, sutural angle obtusely rounded, disc convex, very faintly 

 alutaceous, the punctuation coarse, deep and close, less so at apex. Body beneath 

 similar in color to the upper surface. Abdomen shining, sparsely, indistinctly 

 punctate. Anterior and middle legs yellowish testaceous, posterior femora brown, 

 sparsely, indistinctly punctate, posterior tibise rufotestaceous. Length .08 inch. : 

 2 mm. 



In this species the thorax is probably more rugulose than in any 

 other of our fauna. It has the coarsest elytral punctuation of all 

 those with the joints 2-3-4 of antennte equal. 



Occurs from Canada and Dakota to North Carolina, Kansas, Illi- 

 nois and Missouri. 



18. li. riilesceiis n. sp.— Oblong oval, rufotestaceous, moderately shining. 

 Antennte longer than half the body, pale rufotestaceous, slightly darker exter- 

 nally, joints 2-3-4 equal in length. Head smooth, a distinct fovea near the top 

 of each eye. Thorax one-half wider than long, not narrowed in front, base 

 moderately arcuate, without marginal line, sides nearly straight, anterior angles 

 feebly obliquely truncate, disc convex, the punctures moderate, sparsely placed, 

 smaller at apex. Elytra not wider at base than the thorax, form regularly oval, 

 humeri oblique, umbone wanting, sutural angles distinct, but obtuse, pygidium 

 concealed, disc convex, the ijunctuation moderately coarse, not close, finer and 

 sparser at apex and sides. Body beneath a little darker than above. Abdomen 

 very indistinctly punctate. Legs j)ale rufotestaceous. Length .05 inch. : 1.25 mm 



Also a small species, entirely apterous, and distinguished from 

 those at present known in this series by the pale color. The apices 



