470 FAMILY XT. STAPH YLTNIDJE. 



Casey. — il A Preliminary Monograph of the North American 

 Species of Trogophloeus," in Ann. N. Y. Acad. Sci., IV, 

 1889, 322-383. 



The following species have been taken or perhaps occur -in the 

 State. 



KEY TO INDIANA SPECIES OE TROGOPHLCEUS. 



a. Thorax with a deep transverse curved or lunate groove near the base. 



b. Color dark reddish-brown; legsypale'. 908. arcifer. 

 bl>. Color black; legs and antennae black; thorax widest before the mid- 

 dle. ANTHRACINUS. 



an. Thorax without a curved groove near base, but usually with a length- 

 wise groove on basal half each side of a slightly raised median line. 



c. Eyes large, convex and prominent, the distance from their hind mar- 



gin to base of head less than one-third their diameter. 



d. Thorax subhexagonal, widest one-third behind apex, the sides 



thence converging and nearly straight to base; its disk broadly 

 impressed on side ; length 3-3.2 mm. 909. quadripunctatus. 

 dd. Thorax rounded in front, widest just in front of middle, sides 

 thence converging to base ; disk not flattened on the sides ; length 

 2.5 mm. 910. memnonius. 



cg. Eyes small, much less prominent, the distance from their hind mar- 

 gin to base nearly as long as or longer than the eyes. 



e. Elytra chestnut brown or paler. 



f. Larger, 2.6 mm. ; thorax coarsely and sparsely punctate. 



phixeoporinus. 



/'/. Smaller, not over 2 mm. ; thorax densely and finely punctate. 



911. poseyensis. 



ee. Elytra black or piceous. 



g. Elytra distinctly longer than thorax; surface not opaque; an- 



tennae shorter than head and thorax ; length 1.8-2 mm. 



912. AGONUS. 



gg. Elytra not longer than thorax; surface strongly granulate and 

 opaque ; length .6 mm. brachypterfs. 



908 (2770). Trogopiit.ceus arcifer Lee, Trans. Amer. Phil. Soc, VI, 1877. 

 245. 



Elongate, rather robust, convex. Uniform dark reddish-brown; legs 

 and antennae slightly paler. Head three-fourths as wide as thorax, coarsely, 

 deeply and rather sparsely punctate. Antennae longer than head and tho- 

 rax, the outer joints thickened. Thorax one-half wider than long, widest 

 just in front of middle, the sides thence curving to base; disk coarsely, 

 deeply and rather closely punctate. Elytra one-third wider and one-half 

 longer than thorax, coarsely but not densely punctate. Abdomen almost 

 as wide as elytra, rather finely and sparsely punctured. Length 2.8 mm. 



Fountain County ; rare. August 17. The specimen at hand has 

 the legs, antenna? and abdomen but slightly paler than elytra ; other- 

 wise it agrees with the description of the type. 



