TIIU SKIN BEETLES. 593 



V. TROGODERMA Lat. 1829. (dr., "to gnaw + skin.") 



Small, oblong-oval species, having the antennal club 4- to 7- 

 jointed and the antennal grooves occupying the entire space be- 

 tween the prosternum and the lateral margin of thorax; elytra with 

 r arrow. oblique crossbars formed by variegated pubescence. Three 

 species are known from Indiana. 



KEY TO INDIANA SPECIES OF TROtiODERMA. 



a. Eyes entire, the inner fn.ntal margin not emarginate; antemue of male 



serrate, the third and fourth joints equal. (Fig. 225. ) 



1>. Thorax strongly and rather closely punctate, especially toward the 



sides ; pubescence persistent. 1131. ORNATUM. 



hl>. Thorax very minutely and sparsely punctate throughout; pubescence 



easily denuded. TARSALE. 



an. Eyes feebly notched <.r einarginate at about the middle of their inner 



frontal edge; male antenn:e compact, not serrate. (Fig. 22<>.) 

 c. Elytra black with reddish bands. 11 31.'. INCLUSTM. 



re. Elytra brown or piceous with dull faint yellow bands. 



1133. OBSOLESCENT. 



1131 (3441'). TUOGODEKMA OK.NATI M Say. Journ. Phil. Acad. Nat. Sci., V. 

 1S25. ISC,; ibid. II, 290. 



Oblong-oval. Klaek, rather shining, tho- 

 rax variegated with reddish and gray 

 hairs; elytra wiA three irregular conflu- 

 ent reddish bands bearing gray pubes- 



Fig.225. Head and ante, of Troj^rma f ' eilCe > Beneath piceous brown. ApOX Of 



ornatum. (After Jayne.) elytra obtuse and as broad as base. Pro- 



sternum long and rather broad at tip. subcarinate. Club of male antenna- 

 formed of joints (> to 11. which are strongly pectinate. Length 3-4.5 mm. 



Vigo, Marion and Posey counties: scarce. March 23-October 

 19. Found about houses and cellars; the larva? occurring, though 

 rather rarely, as a museum pest in insect collections. 



0. tarsalr Melsh.. length 1.8-2.5 mm., has been recorded from 

 near Cincinnati. 



H32 (_ -). TROGODERMA INCLUSUM Lee.. 1'roc. Phil. Acad. Nat. Sci., 1854, 



110. 



Oval, somewhat oblong. Black; thorax 

 with lines of gray hairs; elytra with four 

 narrow, sinuous, more or less confluent red 

 dish bands bearing gray pubescence, the sub- 

 apical band enclosing a transverse rhombus 



Fig. 226. Head and antennae of Tmgoderma 

 on the suture. Thorax Ot the female twice i,, r l lllium< showing notched eyes. (After 



as wide as, long, finely and sparsely punciati-. M'"*?-) 



Elytra more coarsely punctate: scarcely narrowed from base to apex. Joints 



of male antennal club not pectinate. Length 2-3.5 mm. 



