AMERICAN COLEOPTERA. 393 



H. addendum, sp. n. — Allied to the preceding, but elytra not eostate ; 

 thorax with the sides nearly straight, not strongly margined, elytra similarly 

 sculptured, markings more obsolete, black color more developed; underside 

 similar. L. -17 inch. 



Lower California. (Horn.) 



H. griseostriatus, DeG. Mem. iv. — Elongate ovate, pubescent, opaque, 

 beneath black, legs and antennae red ; -above black, uniformly and densely 

 punctulate, with no trace of lines, elytra with numerous narrow sub-confluent 

 vitUe, or even entirely greenish-black; beneath densely punctulate. L. -18 

 inch. 



Canada, Lake Superior, California. Some examples are very dense- 

 ly pubescent ; the variations in color in this species have caused it to 

 be described under various names : H. catascopium, interruptus and 

 parallelus, Say, are all referable to this species. 



G. — -Punctate beneath, posterior femora smooth, with a line of setigerous punctures 

 along the middle. 

 a. — Pubescent, rufous and strongly punctate beneath. 

 H. eonsimilis, Lee. Lake Sup., p. 214. 



Thorax very finely margined, body beneath coarsely punctate. 

 Lake Superior. 



H. sericeus, Lee. 1. c. p. 214. 



Very near H. eonsimilis, but thorax with the sides straighter and 

 more sharply margined in front. Lake Superior, Illinois. 



H. umlulatiis, Say, Am. Phil. Tr. ii., 102. 



Excessively variable ; thorax with a rather broad flattened margin • 

 H. opposiius, Say, does n >t seem to me separable from this species. 



H. spurius, Lee. Pr. Acad., 1855, p. 296, 29. 



Differs from undulatus in not having the clypeus thickened, and the 

 elytra have a sutural row of deeper punctures. Canada. 



H. mixtus, Lee. 1. c. p. 296, 30. 



Very near B. spurius, but more elongate and much more sparingly 

 punctate. Nebraska. 



II. seiiiiruf'us, Lee. 1. c. n. 32. 



Closely and finely punctate. Fort Laramie, Texas. 



H. vittatns, Lee. 1. c. n. 34. 



Very sparingly and finely punctate, the front margin of the puue- 

 tures raised. Fort Laramie. 



H. vitiosns. Lee. 1. c. n. 35. 

 % visibly punctate- 9 very closely punctate. 



