652 Coleopterological Notices, IV. 



the middle, separating the coxae by scarcely more than one-fourth 

 of their own width. Length 1.8-2.6 mm. ; width 0.8-1.25 mm. 



Pennsylvania, Indiana, Kentucky and Missouri. A sufficiently 

 common species, the smallest of the genus, rather more convex than 

 usual and with more prominent humeri, but not differing from the 

 others in generic structure. The claws are perfectly free, slender 

 and divergent. 



3 Idiostethlis ellipsoideus n. sp. — Rather narrow, elliptical, con- 

 vex, shining, black throughout, the tibiae and tarsi piceous ; vestiture whitish, 

 consisting above of very small recumbent setae, slightly wider and closer 

 toward the sides of the pronotum and disposed in a single uneven line on 

 each interval, without larger dispersed squamules on the elytra, but with two 

 or three at each side of the middle of the pronotum near lateral fourth ; under 

 surface sparsely squamulose, the prosternum and mes-episterna more densely 

 so, the met-episterna and sides of the abdomen thence to the apex covered 

 with an extremely dense crust of small overlapping feathery scales. Head 

 finely but deeply and distinctly, not very sparsely punctate, the beak densely, 

 rugulosely so and sparsely squamulose at the sides, with a feebly impressed 

 line of punctures on each side of the narrow subcariniform impunctate line, 

 slender, strongly arcuate, a little longer than the head and prothorax ; 

 antennae inserted beyond the middle, the scape rather long, first joint of the 

 funicle as long as the next four, second nearly one-half as long as the first 

 and almost as long as the next two ; club rather large, elongate-oval, densely 

 pubescent, nearly as long as the preceding six joints combined, with the basal 

 joint constituting but slightly more than one-third of the mass. Prothorax 

 two-thirds wider than long, the sides feebly convergent and nearly straight 

 to apical fourth, then strongly rounded to the apical constriction ; apex trun- 

 cate, tubulate, one-half as wide as the base, the latter transverse, with the 

 median lobe small but distinct; disk not very coarsely, deeply, unevenly 

 sculptured, longitudinally rugulose toward the narrow abbreviated and sub- 

 carinate impunctate line. Scutellum minute, quadrate, impressed. Elytra 

 quite distinctly wider than the prothorax, and two and three-fourths times as 

 long, nearly one-half longer than wide, hemi-elliptical in outline, the sides 

 becoming parallel and nearly straight in basal half, the humeri small but 

 slightly prominent ; disk with not very coarse but deep, abrupt striae, the 

 intervals flat, about twice as wide as the grooves, each with a single wide, 

 feebly impressed line of coarse but feeble, close-set, somewhat confused and 

 uneven punctures. Abdomen very densely punctate. Prosternum nearly nor- 

 mal, tumid and strongly, anteriorly declivous. Length 2.6-3.5 mm. ; width 

 1.1-1.7 mm. 



Iowa; Missouri. 



A distinct species varying considerably in size. Four specimens. 



4 Idiostethlis dispersus n. sp. — Oval, rather stout, moderately con- 

 vex, black ; legs rufo-piceous ; integuments polished, the vestiture sparse and 



