468 Coleojiterological Notices^ VI. 



griseus was certainly not a preoccupied name in Bjturosomus or 

 Pristoscelis, altliongli LeConte himself seems to have agreed to 

 the change even in the second edition of the " Classification." In 

 his revision of the Dasytini (Proc. Acad., Phila., 1866, p. 351) Le- 

 Conte assumes that Motschulsky did not know his griseus, but 

 had mistaken /"kscms for it; but this idea seems to have been sub- 

 sequently abandoned, for (Class. 2 ed., p. 215) Byturosomus is 

 said to have been founded upon "Z). rufii^es Motsch. {griseus \\ 

 Lee.)." Finally (1. c, p. 353) LeConte states that griseus Lee. 

 and antennatus Motsch., are identical, and places the former as the 

 synonym, although it antedates antennatus by some seven years. 

 It is not possible that more than a fraction of the species can 

 be defined in the following table, and it is onl^y hoped that the 

 short characterizations may prove of some avail as an index to 

 the descriptions. The species are rather monotonous, though ap- 

 parently not especially variable within the limits of the respective 

 sexes except in size; the sexual differences in outline are how- 

 ever sometimes pronounced, as before remarked : — 



Body clothed with subdecumbeut hairs, without trace of intermixed erect 

 setse; marginal cilia of the prothorax generally short and pale in color.. .2 

 Body clothed with dense suljdecunibent and cinereous pubescence, which is 

 intermixed, at least toward the sides of the elytra, with short sparse and 

 erect cinereous setaj which frequently seem to be subserial in arrange- 

 ment ; fringe at the sides of the prothorax usually short, even and close- 

 set 16 



Body clothed with short cinereous or blackish subdecumbeut pubescence, in- 

 termixed abundantly with long hispid hairs, black or ciuereou* in color, 

 the hairs at the sides of the prothorax long, erect and bristling, and not 



forming a regular or close-set fringe 22 



Body clothed with moderately long suberect blackish pubescence, the margi- 

 nal fringe of the prothorax composed of rather short even and stiff black 



hairs 36 



2 — Elytral pubescence vniiform in structure and distribution 3 



Elytral pubescence uneven in structure and distribution 15 



3 — Elytra uniform in coloration, black or slightly piceous 4 ' 



Elytra pale or bicolored 13 



4 — Apical angles of the prothorax more or less anteriorly prominent. 

 Basal angles of the prothorax prominent. 



Apical angles broadly rounded 1 . coilipactiis 



Apical angles not rounded 2. brevis 



Basal angles broadly obtuse and rounded, the apical narrowly rounded and 

 only slightly blunt. 

 Elytral pubescence coarse, dense and cinereous 3. ores^oiieiisis 



