636 Coleopterological Notices^ VII. 



Closely allied to the eastern castaneum, but differing in its 

 slightly larger size, just visibly stouter and more convex form and 

 more marked punctuation ; it also differs in the slightly arcuate 

 and not rectilinear sides of the prothorax and in the form of the 

 terminal pygidium. The species can be distinguished at once 

 from simplex by its more elongate and more deeply striate elytra. 



C sticticum. — Oblong, parallel, strongly depressed, shining, castaneo- 

 rufous, the legs and antennal club paler rufous; under surface slightly darker 

 and more piceous. Head perceptibly more than ^ as wide as the prothorax, 

 finely, sptirsely punctate; antennae moderate in length, the joints 7-9 of the 

 funicle rather rapidly increasing in thickness, the latter perceptibly wider than 

 long; club strong, oval, moderately compressed, the basal joint occupying 

 more than }4 ^^^ length, the apical spongy portion apparently with an 

 imperfect median annulus of hairs. Prothorax not quite as long as wide, dis- 

 tinctly widest at about apical fourth, the sides thence very feebly convergent 

 and just visibly arcuate to very near the basal angles, where there is a feeble 

 sinuation, strongly rounded at apex, the basal angles just visibly everted, not 

 rounded; apex barely more than % as wide as the base, feebly emarginate in 

 circular arc; base very feebly arcuate, the median lobe scarcely differentiated; 

 disk depressed, convex toward the apical angles, rather sparsely, somewhat 

 coarsely and strongly punctate, feebly impressed and more densely punctate 

 at each side at the basal margin; setse inconspicuous, even under a power of 80. 

 Scutellum longer than in castaneum and more subangularly rounded behind, 

 transverse and flat. Elytra but slightly more than % longer than wide, fully 

 % longer than the prothorax but not evidently wider, widest before the mid- 

 dle, the sides very feebly arcuate; apex semicircularly rounded; humeral 

 angles acute and minutely everted; striae rather fine but strong, evidently 

 punctured, the first approaching the suture posteriorly, the sutural interval 

 strongly depressed toward tip. Under surface evidently and rather closely 

 punctured, the legs stout. Length 2.5 mm. ; width 0.85 mm. 



Iowa (Iowa Cit}^). 



The points of difference between this species and those of the 

 castaneum group are numerous and well marked ; the prothorax, 

 for example, being as wide as the elj'tra and of a different form, 

 with much larger and deeper punctures, and the last three joints 

 of the antennal funicle are gradually wider, while in castaneum 

 the joints 3-8 are equal in width, 9 being larger and obtrapezoidal ; 

 the annuli of hairs toward the apex of the club are also much more 

 marked than in castaneum. 



C. clypeale. — Oblong-elongate, parallel, strongly depressed, polished, 

 glabrous, dark rufous in color, the legs but slightly paler and the under sur- 

 face somewhat darker; setse entirely inconspicuous. Head % as wide as the 

 prothorax, rather strongly convex, very minutely and quite sparsely punctate; 



