1 9A r ) 



THE DARKLING BEETLES. 



present than absent and the tarsi are pubescent beneath. Nine of 

 Se n tribes recognized by LeConte and Horn are known to be 

 represented in the State. 



KEY TO INDIANA TRIBES OF TENEB1UON1N-E. 



. F , „t of head entires corneous or horn-like in texture, never hinged 

 , ir S^ZTZ, n,t *** moderate or eiongate, never 

 very short ; cheeks not silicate. 

 c. Byes less prominent than the sides of front, more or less tin,,.- 

 verse, always emarginate in front. 



Next to last joint of tarsi entire. 

 a. jsextioias j mirtfl , P c . x,e with trochantin ; antennae 



e Front coxa- rounded, nndoie coxa 



with third joint usually longer than those followmg. 

 , Front feebly dilated at the sides; tarsi with silken pubes- 

 Ice beneath; form elongate, rather slender; size large, 

 1 usually 12 or more mm. _ /. _ p . ,,. Ja 



„. Front broadly dilated at sides, emarginate in front; front 

 tarsi of male dilated ; form short, oval ; smaller 6-10 mm. 

 L Tribe IT. Pedinini, p. 



e , ,•;•„„, coxa, subtransverse ; middle coxa, -itliout tro^antin ; 

 third joint of antenrae short ; tarsi pubescent the last joint 

 long; form oval or elongate; length less than 12 mm. 



Sj Tribe III. Ulomini, p. 12o3. 



U Next to last joint of tarsi bilobod; surface coarsely punctured; 

 Z gth less ban 6 mm. Tribe IV. Heterotabsini. p. 12oS. 

 Ev „e prominent than the sides of front, usually rounded, fee- 

 Z or n * emarginate; for,,, usually oval or rounded, convex, 

 less than 7 mm. Tribe V. D.aberini p. 1-bCK 



bb Tal . impressed, their first joint short; cheeks sulcate; surta .e v iv 

 j-tiifei tu i Tribe VI Boletophagint, p. 1-W>. 



m Front'ltb a coriaceous or leather-like margin, or a coriaceous band 



Z ween it and the labrum ; third joint of antenna, long. 



, S d s f front not obliquely elevated; abdomen not pedunculate, 



outer joints of antennae broader; bead not deflexed. 



outei j«,r,= Trlbe yII nKU „.| N1 , p. 120N. 



Sides of front obliquely elevated. 



ft inner wings wanting; metastermuu very short, body robust Co 

 " 11 B Tri , H , Yin. Meracanthini, p. 120.'. 



vex 



/,„ Timer' wines present; metastemum long; body slender. 



/,/>. lnnei wnw i T _ be IX StrongY liini, p. l-^<>. 



Tribe I. TENEBRIONINI. 

 Rather elongate, uniform black or piceouB species of medium or 

 iarg^e, having the head prolonged, but scarcely narrowed behtnd, 



