NORTH AMERICAN COLEOPTERA. 33 



dellistena, bearing short, closely placed spinules. In repandus these 

 ridges are obliterated to such an extent that scarcely any traces can 

 be observed. 



The underside of the prothorax shows two forms of sculpture — 

 that in which the surface is shining and the punctures simple, al- 

 though closely ])laced, and that in which the surface is opaque and 

 rather roughly granulate-punctate. 



These characters afford the means of arranging the species in tab- 

 ular form with a sharpness of definition that will enable them to be 

 readily determined. 



The following is the arrangement proposed : 



Eyes narrowly separated, sometimes almost contiguous on the front ; form dis- 

 tinctly narrower i)osteriorly 2. 



Eyes widely separated on the frotit; form very little narrowed, obtuse poste- 

 riorly* 4. 



2. — Middle and posterior tibiae without distinctly defined transverse ridges ; body 



beneath and legs piceous repaudiis. 



Middle and posterior tibire with distinct transverse ridges on their outer 



edge 3. 



3. — Underside of prothorax densely roughly iiunctured: legs and body beneath 



piceous arizoneii!«i*«. 



Underside of prothorax shining, closely, but not roughly punctured ; legs 



and abdomen pale brown or reddish bicolor. 



4. — Piceous black : prothorax beneath shining, the punctures close, but not rough. 



coiifinis. 

 Brown ; prothorax ))eneath densely, roughly punctured tonientosus. 



E. repandus u. sp. — Oval, convex, distinctly narrowed posteriorly, moder- 

 ately shining, sparsely clothed with short blackish hair. Antennffi dark brown 

 or black, the four basal joints paler, apical half of last joint yellow. Eyes very 

 narrowly separated on the front. Thorax densely punctured, the basal impres- 

 sion on each side moderately deep, short. Elytra striato-punctate, the punctures 

 moderately coarse and close, but become rapidly finer, so that at apical fourth 

 they are hardly distinguished from the interatrial punctures which are densely 

 placed on the flat intervals. Prosternum densely punctured, the side pieces 

 more finely slightly shining, sparsely pubescent. Body beneath and abdomen 

 densely punctured. Legs black, the tarsi brown. Middle and posterior tibise 

 without ti-ansverse setigerous ridges. Length .24 — .28 inch ; 6 — 7 ram. 



While this species is usually entirely black, the abdomen is occa- 

 sionally brown, but never so pale as in bicolor, nor are the legs ever 

 pale. 



* To this series E. dermestoides, of Europe, should be referred. From the de- 

 scriptions the eyes are even more widely separated than in our species. 



TRANS. AMER. ENT. SOC. XV. (5) MARCH, 1888. 



