May, 1910. Notes on Some Clerid^ — Wolcott. 367 



in our fauna. Two species new to science have recently been given 

 the author and these, with two described by Dr. Horn after the pub- 

 lication of his synopsis, give a total of ten species now known from the 

 entire continent of North America. 



The color and markings are extremely variable in several of the 

 species, consequently the writer has sought other characters than 

 those used bv Dr. Horn. 



KEY TO THE SPECIES OF TRICHODES. 



a. Very slender, sides of elytra parallel. 



b. Pubescence of abdomen long, evenly distributed, oresterus 368 

 bb. Pubescence of abdomen very short and sparse, longer and 



dense at the sides on posterior margin of segments two, three, 

 and four. 



c. Head rather sparsely punctate: antenna- entirely black; ely- 

 tral pile erect, black. penittsularis, 369 



cc. Head very densely punctate; antenna- rufous, mass often 

 darker; elytral pile in part pale. illustris, 369 



aa. Robust, sides of elytra broadest behind the middle. 



d. Elytral apices (o^) truncate, sutural angles prolonged; thorax 

 very coarsely, (h-n^.^lv pimctate; thriracic ]>ubescence ver}' 

 long. simulator, 370 



dd. Elytral apices (o , +) rounded; thorax densely but less 

 coarsely punctate; pubescence shorter. 



e. Antennal club broadly triangular. 



f. Prothorax in great part reddish. bibalteatus, 371 

 ff. Prothorax entirely blue, violaceous, or greenish. 



g. Elytra feebly shining, black or purplish with faint cupreous 

 surface luster, trifasciate with yellow; abdomen in part red. 



nexus, 372 

 gg. Elytra shining, blue, fasciate or maculate with yellow (rarely 



unicolorous) ; abdomen shining blue, 

 h. Prothorax with sides compressed apically, strongly compressed 

 at base. ornatus, 372 



hh. Prothorax subquadrate, sides slightly compressed at base. 



bimaculatus, 374 

 ee. Antennal club elongately triangular. 

 i. Elytra sparsely, not very coarsely or deeply punctate. 



nuttalli, 374 

 ii. Elytra densely, coarsely, cribrate-punctate. apivorus, 375 



