Coleopto'ological Notices, IV. 411 



next two ; club slender, gradually, acutely pointed, ratlier densely pubescent. 

 Prothorax transverse, one-third to two-fifths wider than long, the sides parallel, 

 broadly, evenly arcuate in basal two-thirds, then strongly convergent and 

 deeply, abruptly constricted, the apex transverse between the very prominent 

 ocular lobes; disk very densely squamose, the sculpture dense and subrugose 

 when denuded. Elytra at base between one-third and one-fourth wider than 

 the prothorax, fully three times as long, one-half longer than wide, the sides 

 parallel and nearly straight in basal three-fifths ; striae indicated by clearly 

 defined narrow partings of the vestiture. Length 2.2-2.3 mm. ; width 0.95 mm. 



Montana (Helena). Mr. H. F. Wickham. 



Closely allied to densus, but differing in its much shorter pro- 

 thorax, shorter beak in the female, with the antennsB distinctly less 

 basal, in its gray and not ochreous vestiture and in many other 

 minor characters. It was taken in abundance, and the six speci- 

 mens before me are very uniform in size. 



Tychiini. 



TYCHIUS Schcinh. 



In subdividing the comparatively few American representatives 

 of this genus, I have made use of some characters which do not 

 exist among the European species, or at least, which have apparently 

 not been mentioned in systematic works. Our species may be 

 readily divided into four subgeneric groups as follows: — 



Antennal funicle 7-jointed. 



Body more or less robust and oval, the elytral intervals entirely devoid of 



recurved setae I 



Body narrower, oblong ; elytral intervals with recurved semi-erect setae. ..II 

 Antennal funicle 6-jointed. 



Body elongate-oval, with robust recurved setae, the entire facies almost as 



in group II; eyes large, very nearly circular IH 



Body much smaller, the species generally minute, with or without erect 

 setae; eyes more or less transversely fusiform IV 



None of these divisions seems to correspond exactly with the 

 European Miccotrogus, although I am not certain of the habitus of 

 that subgenus, specimens sent to me by M. Desbrochers under the 

 name M. jncirosti-is having the antennal funicle certainly 7-jointed. 

 It can be confidently affirmed, however, that the structure of the 

 funicle is without full generic significance in our species, for the 

 reason that groups II and III agree so satisfactorily in all other 

 structural features. At the same time, there is sufficient hete- 

 rogeneity to warrant a division into subgenera on the lines above 

 Annals N. Y. Acad. Sci., VI, Aug. 1892.— 28 



