1246 FAMILY LV. — TENEBRIONID.^. " 



not received in the thorax as far as the eyes, whieli are transverse 

 and emarginate; front feebly dihited on the sides, covering the l)ase 

 of mandibles; antenn;e i;ra(lually thickened toward \i\)H; elytra em- 

 bracing feebly the flanks of the ai)domen; legs long; ti))ial spurs 

 small. Seven of the 18 reeogni/ed genera are known to be repre- 

 sented in the State, while members of another perhaps occur. They 

 live, for tbc most part, beneath the l)ark oP dead trees. 



KKY TO INDIANA OENF.KA OK lEXKlSKIONINM. 



a. Tarsi densely elotbed beneath with fine, sliorl, sillsen pubescence. 



b. Antennse distinctly shorter than head and thorax, their outer joints 

 transverse, the last Joint subquadrate, rounded at tip. 

 c. Epipleuroi entire, narrower at apex ; length 15 or more mm. 

 (1. Sides of mentnm with small infiexed lobes; thorax not narrowed 

 at liase. I. Nyctobates. 



dd. Sides of mentum without IoIk's: thorax narrowing l>ehind and 

 cn'uulate on tlie sides. IpiiTiiiMrs. 



cc. Epipleune not reaching tlie tips of elytra. 



c. Femora strongly club-shaped, blnclc, sliining; larger, 1S-2G mm. 



II. Merinus. 

 cc. Femora slendei-. in oiu- species rcddisli-l>rown : smaller, not over 



11 mm. HI. llAPLANDRUS. 



hb. Antenna? more slender, as long as or longer than liead and thorax, 

 the outer joints triangular, the last one oval, more or less acute. 

 f. Front margin of front of lioad tliiclvened and sliglitly reflexed. 



IV. SCOTOBATES. 



//. Front margin of front not thiclvcned or retlexed. V. Xylopinus. 

 (III. Tarsi rather sparsely clotlied beneath witli coarse laibescence. 



//. E]>ii)]eura^ entire; form more or less convex; length 10 or more mm. 



VI. Tenebrio. 



!/</. Kpipleura' abbreviated; liead transverse; form nnich flattened ; length 



5-6 mm. VII. Doliema. 



I. Nyctobates Guerin. ISoi. (Gr., ''night + walker.") 



Large black or pieeous elongate forms, separated from allied 

 genera only by the characters given in the generic key. Two of the 

 three known species occur in the State. 



KEY TO INDIANA SPECIES OK NYCTOBATES. 



a. Under side of meiituin siminlh; elytral i-(i\vs of punct\ires line. 



i::!0i'. pknnsylvanica. 

 (Id. Under side of mentum witli a tuft of i-atlier long yellowish hairs; ely- 

 tral punctures much coarser. 2303. barbata. 



