42 GEO. H. HORN, M. D. 



The legs may bo entirely red or even entirely black with all 

 variations between. 



The synonymy therefore is : 

 B. suturalis (Say). 



miniatus (Germ.), rutilans (Lee), ruber (Lee), Pearsalli (Bid.) 



B, ignicollis (Say); sanguinicollis, Germ.; coccineicollis, Hald. 



This is, of course, a very distinct species, its characters in brief 

 are: Black, sparsely pubescent; thorax red, elytra densely punc- 

 tured. 



POGO.'VOCHEBUS Serv. 



A study of the typical specimens in the cabinet of Dr. Leconte 

 leads me to the following results, with which I think he fully 

 agrees. 



P. sordidus Lee, has already been removed to the genus Estnia 

 Fairm., (see Trans. Am. Ent. Soc. 1875, p. 150). 



Elytra truncate at tip and more or less dentate 1. 



Elytra rounded at tip 2, 



1. — Legs and sides of elytra with long flying hairs; elytra with moderately 



large uinbone at middle of base criuitus Lee. 



Legs and elytra without flying hairs. 



Elytra with lateral costse well marked and with a row of five or six tufts 



of erect black setse ....; penicillatns Lee. 



Elytra without lateral costse and tufts niixtus Hald. 



2.— Elytra with moderately long hairs on the upper surface, and punctured 

 very sparsely at basal half only oregOllUS Lee. 



P. crinitus Lee, may not belong to the genus, its appearance is cer- 

 tainly unlike the other species, at first glance it strikingly resembles 

 Acanthoderes decipiens excepting the elytral umbone. 



P. penin'llatus Lee, is very distinct by the lateral ridges and tufts 

 of erect setae. 



P. mixtus Hald. To this I have added as synonyms swiplex and 

 parvidufi Lee. The former does not differ at all, the second is merely 

 a very small form. I find among the specimens some difference in the 

 tips of the elytra which is merely individual, consisting in the greater 

 or less distinctness of the tooth limiting the emargination of the tip 

 externally. In some specimens a tooth is well marked and may even 

 be called a spine; from this all degrees of variation are seen until the 

 angle is completely rounded. 



P. oregonus Lee, is very distinct by the rounded tips of the elytra 

 and the rather long black hairs of the upper surface, and moderately 

 long pale hairs on the legs and sides of the elytra. These hairs are 



