630 Coleopterological Notices, VII. 



than the elytra, the sides strongly arcuate ; border very wide ; basal carina 

 very short, extending through basal ^5 or less. Length 1.8 mm.; width 0.85 

 mm. 



Kentucky; Indiana. 



The specimens before me agree very well together, but are fe- 

 males ; in comparison with the same sex of humeralis, this species 

 differs in its longer and more shaggy pubescence, evidently shorter 

 antennae, smaller and relatively much shorter prothorax, more 

 abbreviated abdominal carina, and in some other features; the mod- 

 ifications of the legs and trochanters are of the same general kind 

 as in the other species, but the process of the middle trochanters 

 is shorter and broader than in humeralis, and the corresponding 

 tibise are quite different, being strongly, evenly arcuate through- 

 out in the latter, while in consimilis they are nearly straight to- 

 ward base, becoming gradually distinctly arcuate thence to the tip. 



The specimens of humeralis in my cabinet are from Canada 

 (Ottawa — Mr. W. H. Harrington) and the Hudson River valley, 

 the latter taken by Mr. H. H. Smith. 



CUCUJID^. 



COLYDIIN^. 

 ADITOMA n. gen. 

 This genus is allied to Bitoma, but differs in the cylindrical and 

 scarcely at all depressed form of the body, with very different 

 sculpture, larger metasternum, convex and not flattened abdomen, 

 with, the third suture strong, and the fourth segment flat and de- 

 flexed, the fifth concave, and in the radically different antennal 

 club. The single species is remarkable in having a large bifid 

 thoracic process, nearly covering and concealing the head. 



A. bifida n. sp. — Elongate, parallel, cylindric, dark rufo-piceous in color 

 and highly polished. Head subtriangular with truncate apex, quite distinctly 

 narrower than the prothorax, depressed above, more deeply toward base, where 

 there is a short longitudinal medial groove in the more excavate portion ; ver- 

 tex before the eyes slightly tumid, coarsely punctured and minutely setulose, 

 the apical margin of the front polished and sculptureless; remainder minutely 

 sculptured and opaque; supra-antennal ridges strong. Antennse ll-jointed, 

 but little longer than the width of the head, thick, cylindric, the joints trans- 

 verse with very thick exposed pedicels; two basal joints thicker, the club small, 

 rounded, the tenth joint obtrapezoidal and slightly asymmetric, at apex nearly 

 twice as wide as the ninth, polished and sparsely setose like the preceding 

 joints; eleventh much narrower than tenth and barely as long, fused within 



