THE SKIN BEETLES. 593 



V. Trogoderma Lat. 1829. (Gr., "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 prostei-nnm and the lateral margin of thorax; elytra with 

 narrow, oblique crossbars formed by variegated pubescence. Three 

 species are known from-Indiana. 



KEY TO INDIANA SPECIES OF TKOGODEKXIA. 



(I. Eyes entire, the inner frontal margin not emargiuate ; antennre of male 

 serrate, the tliii-a and fourth joints equal. (Fig. 22."i.) 

 ';. Thorax strongly and rather closely punctate, especially toward the 

 sides; pubescence persi.stent. 1131. ornatum. 



hh. Thorax very minutely and sparsely punctate throughout; pubescence 

 easily denuded. taesale. 



aa. Eyes feebly notched or emnrginate at about the middle of their inner 

 frontal edge; male antenn;e compact, not serrate. (Fig. 220.) 

 c. Elytra black with reddish bands. 1132. inclusum. 



er. B]j^:ra brown or picecius with dull faint yellow bands. 



1133. OBSOLESCENS. 



11;>1 (3442). Tkogodekma ornatum Say, Journ. Phil. Acad. Nat. Sci., V, 

 182"), 1S(;; ibid. II, 290. 



Oblong-oval. Black, rather shining, tho- 

 rax variegated with reddish and gray 

 hairs; elj4ra with three irregular conflu- 

 ent reddisli bands bearing gray pubes- 

 Fig.22j. Head aal aitenna; of r,o,p.;c™a CPnce ; beneath piceous brown. Apex of 

 omrtum. (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 (i to 11, wliich are strongly pectinate. Tjength 3— 1.5 mm. 



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

 ]9. Pound aliout houses and cellars; the larva} occurring, though 

 rather rarely, as a mustaim pest in insect collections. 



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

 near Cincinnati. 



ll.'!2 ( ). Trogoderma inclusum I^ec, I'roc. Phil. Acad. Nat. Sci., 1854. 



110. 

 Oval, somewhat oblong. P>lack ; thorax 

 wifh lines of gray hairs; elytra with four 

 narrow, sinuous, more fir less ci influent red- 

 dish bands bearing gray pubescence, the su!i- 



apical band enclosing a transverse rhombus 



rr-i -c j-i tf I J- ■ Fig. 226. Head and antennae of Trofforfenna 



on the suture. Thorax of the female twice i„<.(raum, allowing notclied eyes. (After 



as wide as long, flnel.v and sparsely imnctate. ■'''y"^) 



Elytra more coarsely pumtatc; scai'cely narrowed from base to apex. Joints 



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



