2. Last ventral foveate in <$, front tarsi of <$ distinctly dilated, size 

 small (2 to 2.4 mm.). 



Front margined, elytra with longitudinal lateral carina, color 

 yellow with black elytral maculation, metasternum, coxal plates 

 and sides of abdomen at base coarsely punctate, remainder of 



abdomen very finely and densely so acaroides 



Elytra piceous black with narrow side markings broad- 

 ening into a rounded lobe at middle, reddish brown. 



var. marginipennis 



Front not margined, elytra not carinate, color of elytra uni- 

 formly red brown, head and thorax paler, body beneath densely 



finely subrugosely punctate throughout farctus 



Last ventral not foveate in the male, front tarsi variable, size 

 larger (2.6 to 3.2 mm.). 



Form broad and. very convex. 



Punctures of elytra unequal, front tarsi of $ dilated .liydropicus 



Punctures of elytra nearly uniform in size, elytra reddish 

 brown with obscure confluent markings, front tarsi of c? 



not dilated punctatus 



Form less broad and less convex, approaching in these respects 



the species which follow intermedius 



3. Color above uniformly reddish brown or castaneous, beneath not 



black, or only partially so 4 



Color above flavo-, rufo- or piceotestaceous, or piceous brown, the 

 elytral disk often with broad nubilous markings which are never 



distinctly vittate, body beneath black 5 



Color above fulvo- or rufotestaceous, elytra with distinct vittiform 

 markings (except 'in some forms of impresso punctatus.) 14 



4. Size a little larger, form somewhat broader and more convex, dis- 

 parity in elytral punctures less evident, females opaque laccophilinus 



Size rather smaller, a little narrower and less convex, elytral punc- 

 tures evidently unequal toward the base, females not opaque: sylvanus 



5. Elytra with intermixed coarser and finer punctures, which are more 



or less generally diffused; elytra without markings 6 



Elytra nearly uniformly punctate, exception being made of the 

 more or less evident sutural and two discal irregular series of 

 coarser punctures visible, especially toward the base, in many species 7 



6. Front and middle tarsi of male narrow, not or scarcely wider than 

 in the female. 



Size smaller (2.6 to 3 mm.), form a little broader, dual punc- 

 tuation of elytra not very evident posteriorly turbidus 



Size larger (3.4 to 4 mm.), form narrower, dual punctuation dis- 

 tinct throughout dispar 



Front and middle tarsi of male distinctly wider than in the female, 



the second joint conspicuously widest. 



Form a little broader, color varying from dull yellow to brown. 



(New England to Lake Superior.) compar 



Form a little more elongate, color darker. (California.) nigrescens 



7. Front tarsi of male at 'most only moderately dilated 8 



Front tarsi of male broadly dilated, nearly or quite as wide as the 

 apical width of the tibia '. 13 



2 



