AMERICAN COLEOPTERA. 295 



C egena Lee. — Resembles blandissima in form and color but is usually 

 smaller and more convex. Head and thorax finely punctulate, less distinctly 

 on the thorax. Elytra with eight rows of very fine punctures moderately 

 closely placed but somewhat irregular in their arrangement, intervals flat, 

 smooth, rarely with a few fine punctures. Metasternum minutely punctu- 

 late. abdomen more coarsely but vaguely punctate. Length .04 — .06 inch; 

 1 — 1.5 mm. 



Male. — Tarsi not visibly dilated. Posterior femur broad at tip, the outer 

 condyle prolonged in a hook-like process. Spurs of middle tibiae short. 

 (PL Vir, fig. 8 b). 



Female. — Femur stout without hook-like process. 



This' species is remarkable ia the shortness of its legs, and especially 

 the broader and shorter middle and hind tibiae which resemble some- 

 what those of Saprinus. The tarsi are also unusually short and com- 

 pressed recalling those of Cremastochilus Schnumii. It is evidently 

 our representative of the European latipes. With this I unite impuhis 

 Zimm., which seems merely a smaller specimen. 

 Occurs from Michigan to Georgia. 



ISOPIiASTUS n. g. 



Head short, broad, not prolonged in front of the eyes, clypeus narrowly 

 emarginate at middle. Labrum short, emarginate. Mandibles moderately 

 prominent not dentate within. Eyes round not prominent. Antennse arising 

 under a distinct frontal ridge, received in distinct grooves on the under side 

 of the head, ten-jointed, first joint short, cylindrical, second equally stout and 

 longer, third more slender, shorter than the second, 4 — 7 short, together very 

 little longer than the second, 8 — 10 forming an abrupt, oval, compressed and 

 rather compact club, the first joint of which is longer, the last smaller and 

 rounded at tip. Maxillary palpi short, last joint cylindrical. Thorax in front 

 emarginate. Prosternum in front of coxae very short, the cavities angulate 

 externally and closed behind. Mesosternum narrowly separating the coxse, 

 vertical between them and not carinate. Metasternum short, hind coxse con- 

 tiguous. Abdomen with six segments. Legs short, fossorial, femora stout, 

 broader at tip, tibise broad, the middle strongly and irregularly spinous, the 

 posterior broad and flat, less spinous. Tarsi short, compressed, 5 — 5 — 4 in the 

 male, 5 — 4 — 4 female. Body almost hemispherical, slightly contractile. 



Among the genera with antennal groove and tarsi dissimilar in 

 the sexes this genus is peculiar in its ten-jointed antennae with 

 triarticulate club. Superficially it resembles Cyrtusa hlandissima to 

 Buch a degree that I find it associated with that species in almost 

 every cabinet. 



I. fossor n. sp. — Rather broadly oval, very convex, rufo-testaceous, shining. 

 Head sparsely finely punctulate. Thorax twice as wide as long, narrowed in 

 front, apex emarginate, base arcuate, sides moderately arcuate, hind angles 

 obtuse, surface sparsely and minutely punctulate. Elytra continuing the curve 

 of the thorax, humeri slightly oblique, obtusely rounded, surface with eight 

 rows of fine punctures moderately closely placed, those of the disc some- 



