NORTH AMERICAN COLEOPTERA. 15 



Female. — Labrum and mandibles shorter than in the male. Thorax twice as 

 wide as long, not wider than the elytra, sides regularly arcuately narrowing 

 from base to apex. 



Variations. — The only variations are in col(n\ In one female the 

 thorax has no median pale stripe. The elytral bands are always 

 continuous, but vary in width. Changes in color from less maturity 

 can easily be accounted for. 



An easily known species from the vestiture and the absence of 

 marginal cilise. On the intervals of the elytra there are distantly 

 placed longer and more prominent golden hairs. In glancing over 

 the species before me it seems hardly possible to mistake this species 

 for any other. It and gemmatus are remarkable in having an ele- 

 vated oblique line on the epipleurse near the base. 



This species is remarkable in being the only one in our fauna in 

 which the stridulating ridge of the first ventral is entire. The ridge 

 begins in the usual manner at the outer front angle of the first seg- 

 ments curves obliquely backward toward the posterior border then 

 bends rather abruptly forward and. extends obliquely to the point of 

 articulation of the trochanter with the coxal angle. 



Occurs from Canada through the Middle States to Texas and as 

 far west as Michigan, Wisconsin and Kansas. 



Before concluding this paper it is proper to indicate the material 

 used: 



The LeConte cabinet has been carefully studied on the occasion of 

 several visits. It contains the types of his own species besides those 

 of Melsheimer. In addition there are several which have been sent 

 by Schaum, and which formed part of the material used by Kiesen- 

 wetter, viz.: collaris, Ihnbatus, fatuus, mollinus, cuniculus and auromi- 

 cans. 



Mr. H. Ulke, of Washington, with his usual kindness, has loaned 

 me his entire and very full series. 



Mr. Samuel Henshaw has added for study several hundred from 

 all parts of the country. 



Mr. E. A. Schwarz has also loaned interesting material and added 

 one new species to the list. 



Mr. M. L. Linell a very useful series collected near N. Y. City. 



Of the species studied H. Schtvarzi has been represented by thir- 

 teen specimens, the remaining species have been studied from more 

 than twenty-five examples, while in undatus, collaris, limhatus and 

 gemmatis, hundreds of each have been before me. 



