North American Species of IVogophlceus. 36 T 



Punctuation coarser and sparser; lustre shining; median ini- 



punctate line of pronotum wide and evident. .53 convexulus 



Prothorax distinctly narrower than the elytra; color black, rarely 



slightly piceous. 



Antennae less robust, much longer than the head and prothorax, 



the latter relatively much smaller 54 debilis 



Antennae robust, never longer than the head and prothorax, the 

 latter relatively larger. 

 Elytra slightly longer than wide, with two small approximate 

 impressions at the middle of the base; abdomen much nar- 

 rower than the elytra, slender, linear, with the sides 



straight 55 bleciiinus 



Elytra slightly but distinctly wider than long and but very 

 slightly wider than the abdomen. 

 Abdominal punctuation tine and very dense, with the sur- 

 face alutaceous; punctuation and pubescence through- 

 out very dense, the latter conspicuous. 



Elytra not at all impressed, rather convex 56 fallax 



Elytra distinctly impressed near the suture toward base, 



57 providus 

 Abdominal punctuation very minute and much sparser, 

 the surface distinctly shining; pubescence extremely 

 short and fine, and, although sometimes rather dense, 

 never decidedly conspicuous. 

 Legs pale flavate; prothorax narrowed very slightly be- 

 hind, the base almost as wide as the apex. 



58 inquisitus 

 Legs black or piceous-black, the tarsi and sometimes the 

 knees paler; prothorax strongly narrowed behind,, 

 the base being much narrower than the apex. 

 Prothorax more strongly transverse, about one-fourth 

 wider than long, the surface more finely and densely 

 punctate and decidedly alutaceous, the median im- 

 punctate line very fine and slightly tumid. 



59 facetu» 



Prothorax more elongate, not more than one-fifth 



wider than long, more coarsely, sparsely punctate, 



shining or polished; median impunctate area not 



tumid. 



Punctuation denser, the punctures separated by 



about their own diameters 60 eoiifiisus 



Punctuation sparser, the punctures separated by 



about twice their own diameters. ..61 §crupulus 



Size smaller, 1.5 mm., slender; lustre dull, the punctures of the 



pronotum not distinct 62 insolUus 



