300 GEO. H. HORN. 



sides regularly arcuate from base to apex, surface punctate similarly to the head, 

 base without marginal line or larger punctures. Elytral striae scarcely at all 

 impressed, but with moderate sized, closely placed punctures, which are equally 

 distinct at apex, the outer rows of punctures coarser and deeper than those of 

 the disc, intervals flat, distinctly puuctulate near the base, but less coarsely than 

 the thorax, and at apex very indistinctly, the interval between the seventh and 

 eighth striae narrow and with a single row of punctures. Body beneath piceous 

 opaque, metasternal area shining, sparsely punctate, distinctly limited. Proster- 

 num distinctly carinate, mesosternal elevation oval, uearlj' half as wide as long. 

 Legs rufo-testaceous. Length .08 inch.; 2 mm. 



This species is closely related to unalis in many ways, more par- 

 ticularly in the fact that the eighth elytral interval is narrow and 

 has but a single series of punctures. The apical pale space is better 

 defined than in any species in our fauna, being limited in front by 

 a regular arcuate line. In raarimis and prcetextahis the pale si)ace is 

 also sharply limited from the piceous, but the edge is somewhat ir- 

 regular, and the pale tends toward the humeri in a narrow band. 



From the descriptions at my command it is not possible to say in 

 what manner this species differs from bifeiiestratus (palustris Th.) of 

 Europe, but as Bedel places the latter in the series in which the 

 eighth interval is at least biseriately punctate, it is probable that our 

 species is different. 



Three specimens from Michigan and Illinois in Mr. Ulke's cabinet, 

 also from Canada. 



■C. hieiuorrhoidalis Fab. — Oval, moderately convex, piceous: elytra 

 piceo-castaueous, brownish or somewhat paler, the apex usually paler than the 

 disc. Palpi and auteunfe piceous, the latter with very dark club. Head rather 

 coarsely and closely punctate. Thorax entirely piceous, the sides regularly ar- 

 cuate from base to apex, basal marginal line and ante-basal impressions wanting, 

 surface closely punctate ; elytra ten-striate, the tenth replaced by a row of punc- 

 tures, striae distinct at apex, moderately closely punctate, intervals flat, densely 

 punctulate, more sparsely at the sides and apex ; epipleurae pale. Body beneath 

 black, opaque; metasternal area shining, sparsely punctate and extended by a 

 line directed toward the outer front angles. Prosternum carinate, mesosternal 

 elevation elongate-lanceolate, punctate. Legs piceo-rufous, femora darker. 

 Length .10— .12 inch. ; 2.5—3 mm. 



This species varies in the color of the elytra from piceous to cas- 

 taneous, those which I have seen belong to the latter variety, but 

 have usually a narrow dark border along the base, which extends 

 along the suture nearly to apex. The sutural angle of the elytra 

 shows a tendency in many specimens to be slightly prolonged, but 

 this is by no means constant, nor does it have the value which 

 Thomson assigned to it. 



