NORTH AMERICAN COLEOPTERA. 259 



€oxge, trifurcate. The sparse vestiture of the entire under 

 surface is of this same nature. 



The single representative of this interesting species was 

 beaten from the low trees bordering the Truckee River, in 

 early spring, at Reno, Nevada. 



Chcetophloeus liystrix Lee, found at San Diego, California, 

 is another singular species and appears to resemble that 

 above described in the structure of the head, but as that 

 species is described as robust and oval, having the surface 

 clothed with erect hair, it is abundantly distinguished from 

 the present which is squamose and nearly cylindrical. 



APPENDIX. 



Notes. 



The genus Colusa is apparently regarded as identical with 

 Echidnoglossa Woll. In order to determine if possible the 

 truth in regard to the mutual relationship of these two gen- 

 era, I have, therefore, made a short comparative study, tak- 

 ing as a basis the careful description of Echidnoglossa, 

 given by Wollaston (Cat. Can. Col., p. 530). As this study 

 may be useful in future systematic investigations, it is given 

 below: — 



In Echidnoglossa the ligula is slender, minutely bifid at 

 apex; the labial palpi are distinctly 3-jointed, the joints 

 subequal in length, the width decreasing. The posterior 

 tarsi have the joints gradually and slightly decreasing in 

 length to the fourth. 



In Colusa the ligula is elongate, very slender, slightly 

 longer than the terminal joint of the labial palpi and is ap- 

 parently perfectly simple at apex. The first two joints of 

 the labial palpi are apparently cylindrical, rather short, 



