126 Coleopterological Notices, III. 



Rocky mountain divide. These groups are nearly, but probably not 

 exactly, equivalent to those which have been indicated in the Euro- 

 pean fauna. 



Group I. 



Elytra with a more or less extended humeral spot of pale rufo-testaceous. 

 Elytra devoid of punctured series. 

 Eyes small. 



Pubescence excessively short and sparse ; form rather narrow and 



convex haldemani 



Pubescence normal ; form broader and more depressed ; prothorax more 



transverse fr a tern a 



Eyes very large ; elytral lines strongly impressed but without distinct 



punctured series megalops 



Elytra with distinct series of larger punctures. 



Pronotum " hardly punctured' ' basillaris 



Pronotum distinctly, deeply punctured. 



Form rather slender and depressed ; head and prothorax small ; elytra 



distinctly more than twice as long as wide tenuis 



Form more convex ; prothorax larger. 



Elytra twice as long as wide ; antennae pale rufo-testaceous through- 

 out foveata 



Elytra scarcely more than two-thirds longer than wide ; antennae 

 piceous-black, pale near the base ; pubescence longer and more 



erect gilvipes 



Elytra unicolorous throughout. 



Elytra without punctured series ; surface highly polished, deep black, very 



finely, sparsely punctured nigerrima 



Elytra with distinct series of coarser punctures. 



Prothorax much narrower than the elytra and but slightly wider than the 



head, sparsely punctate ; eyes large gracilis 



Prothorax scarcely narrower than the elytra, much wider than the head, 

 coarsely and very densely cribrate ; eyes small rufipes 



Group II. 



Elytra with a red humeral spot. 



Pronotum narrowly, abruptly explanate at the sides marginata 



Pronotum not explanate at the sides. 



Eyes rather small, separated by twice their width ; prothorax equal in 



width to the elytra trinotata 



Eyes large, separated by but slightly more than their width ; prothorax 



narrower than the elytra longilla 



Elytra without humeral red spot. 



Prothorax smooth, polished, extremely finely, sparsely punctured ; elytral 

 striae very deeply impressed, almost sulciform ; size large Tricolor 



