468 Coleopterological Notices. 



are described hx Champion as affecting some of the Central Ameri- 

 can species of Blapstinus, such as tibialis and grandis; I have not 

 observed this character in any of our species however. 



The several groups and their component species may be readily 

 distinguished by the following table: — 



Basal angles of the protliorax obtuse, not distinctly prominent posteriorly ; 

 elytral punctures never asperate. 



Anterior angles of the protliorax obtuse, not prominent I 



Elytra not deeply sulcate. 



Surface shining ; elytra but slightly wider than the prothorax ; elytral 

 stria? very feebly impressed, the intervals flat ; third antennal joint 

 shorter than the next two combined. 

 Humeral angles dentiform and feebly everted. 



Form slender, parallel parallelllS 



Form more robust and convex. 



Bicolored ; pronotum very minutely and sparsely punctate toward 



the middle seriatus 



Unicolorous, much larger ; pronotum more coarsely and much 

 more densely punctured toward the middle. 



guadalupensis 



Humeral angles broadly rounded uniform i- 



Surface dull ; elytra very much wider than the prothorax, elliptical ; 

 striae distinctly impressed ; intervals feebly convex ; third antennal 



joint fully as long as the next two combined opacus 



Elytra deeply sulcate. 



Elytra at base narrower than the base of the prothorax ; intervals 



equal -in elevation silica t MS 



Elytral base equal in width to that of the prothorax ; alternate inter- 

 vals much wider and very much more elevated alteriiatlis 



Anterior angles of the prothorax acute and anteriorly prominent ; elytral 



punctures very minute II 



Surface smooth although very dull and alutaceous ; elytra with but faint 



traces of punctured stria? gagates 



Basal angles of the prothorax acute and distinctly produced posteriorly ; 



punctures of the elytral intervals strongly asperate Ill 



Slender ; elytral intervals rather strongly convex ; head about three-fourths 



as wide as the prothorax granillatus 



Robust and more depressed ; intervals very feebly convex ; head scarcely 

 two-thirds as wide as the prothorax crassipes 



C. parallelllS Lee. — Ann. Lye. N. Y., V, p. 146. — Rather slender, 

 parallel, convex, black ; antenna? and legs dark rufo-testaceous ; head and 

 pronotum often slightly piceous ; lustre and vestiture nearly as in seriatus. 

 1I<, id transverse, finely, rather deeply and densely punctate ; epistoma very 

 feebly sinuate in the middle of the very wide apex ; upper lobe of eye quite 



