109 



EE The interstrial punctures small except near the declivital 

 margin; the pronotal punctures close upon the sides; the 

 female with the epistoma entire. (PL 17, fig. 5). 



latidens Lee. Page 114. 



DD The declivity more oblique, with four teeth on each side, of 

 which the third is usually longest, at least in the male, and 

 connected at the base with the second by an arcuate ridge; 

 the club usually with one or more sutures strongly bisinuate 

 or very strongly angulate at the middle; the epistoma entire; 

 the elytral punctures not decreasing gradually in size towards 

 the base (PL 17, fig. 7). 



E The sutures of the club very strongly angulate at the middle 



(Fig. 5, p. 29.) Beetles of large size and coarse sculpture. 



F A larger species with coarser sculpture; length usually 



5 mm. to 5-5 mm.; the form stouter; punctuation of 



the elytra deep, coarse and subquadrate; the declivital 



armature coarser. 



integer Eichh. Page 114. 



FF A smaller and more slender form, 4-3 mm. to 5 mm. in 

 length; punctuation of elytra moderate and armature 

 finer. Doubtfully distinct. (PL 13, fig. 4). 



plastographus Lee. Page 114. 



EE The first suture of the club bisinuate or nearly straight, the 

 second more or less strongly bisinuate or angled at the 

 middle (PL 10, fig. 10). 

 F The discal interspaces impunctate except near the 



declivity, rarely punctured on the 1st and 2nd. 



G Larger, 4 mm. to 5-5 mm., stout, elytral disc little 



longer than pronotum ; striae usually impressed, with 



interspaces convex; pronotum very short and stout, 



not longer than wide; declivital teeth stouter; 1st 



two interspaces granulate punctate, hairy to the 



base; the pronotum sparsely, finely punctured 



behind; the pubescence erect, abundant; the profile 



of the elytral suture on the disc strongly arcuate. 



perturbatus Eichh. (hudsonicusLec.) Page 115. 



GG Smaller, more slender species; the striae usually only 

 slightly or not at all impressed; the first two inter- 

 spaces not granulate and hairy to the base; the 

 elytral suture in profile straight on the basal half. 



H Size very small, length, 2 3 mm. to 2 8 mm. ; the 

 last three declivital teeth subequal. Southern 

 United States. avulsus Lee. Page 115. 



HH Larger species, length usually over 3 mm. ; the last 



declivital tooth smaller than the 2nd or 3rd. 

 I The pronotum evidently longer than wide, the 

 punctures of the discal striae much smaller 

 near the declivity. Eastern species. 

 J The pronotum arcuate on the sides, the punc- 

 tures small, the asperities of the cephalic 

 half small, close and arcuate; the elytral 

 striae usually not impressed, the 2nd inter- 



