Xorth American Species of Trogoplilceus. 339 



as morio Er. has not been compared with the original, and until 

 this can be done, more or less doubt must attend the indentifi- 

 ■cation. 



The following table will serve as a partial guide to the recog- 

 nition of the comparatively few spexjies represented in my 

 oabinet : — 



:Sides of the prothorax convergent behind and straight or very nearly 

 so. 

 Pronotum broadly dull and scabrous laterally, the punctures there 

 being very large, variolate and polygonally crowded. 



13 occiduus 

 Pronotum shining, the punctures at the sides larger and denser, but 

 always separated and circular. 

 Pronotum very broadly and indefinitely impressed or subexplanate 

 at the sides near the middle. 

 Elytra sparsely punctate. 



Eyes very large, the tempora behind them reduced to a small 



point 14 quadripunetatus 



Eyes smaller, the tempora very distinct 15 coiijuiictus 



Elytra densely punctate ; tempora distinct 16 morio 



Pronotum either not impressed laterally, or very narrowly and in- 

 definitely so along the margin behind the middle. 

 Eyes moderate, not very prominent and more finely faceted, the 



tempora nearly one-half as long 17 sprelus 



Eyes large, prominent, very coarsely faceted; the tempora short, 

 always less than one-third as long as the eye. 



Elytra very densely punctate , . . 18 apaclieanus 



Elytra more coarsely and sparsely punctate. 



Pronotum very finely, densely punctate 19 manciis 



Pronotum sparsely punctate and more polished. 

 More robust ; sides of prothorax more narrowly rounded. 



20 spectatus 

 More slender ; sides of prothorax very broadly rounded and 



coarctate to the apex 21 imbellis 



Sides of prothorax convergent behind and broadly, distinctly arcuate. 



22 lepidus 



The terms large, moderate, j^romiiient, etc., relating to the 

 eye are of course simply comparative within the limits of the 

 group. 



13 T, occiduus n. sp.— Moderately robust, black ; legs and antennae 

 throughout rather pale reddish-brown ; pubescence very fine, rather 

 short, subrecumbent and moderately dense ; integuments shining. 



