608 FAMILY XXV. IlISTERID.uJ. 



outer with ouly a trace. Propygidium coarsely and sparsely, pygidium more 

 finely, punctured. Front tibiie with three teeth, the apical prominent and 

 slightly bifid at tip. Length 5-6.5 mm. 



Throughout the State ; more frequent in the northern counties. 

 June 10-September 18. Occurs in putrid fungi and excrement. 

 The subhumeral, fourth, fifth and sutural stria; are often partially- 

 represented by detached punctures and the sutural rarely reaches 

 apex. 



1153a (349G). Histeb depubator incektus Marsuel, Mon. Hist., 1854, 269. 

 A variety of depurator without trace of subhumeral stria and with the 

 eyipleura tri-striate. Length 5-6 mm. 



Vigo County; scarce. June 11. 



1154 (3495). IIisTEK ruKTivus Loc, Proc. Phil. Acad. Nat. Sci., 1859, 3]:;. 

 Resembles tJvpunito)-, differing only in having the subhumeral striii 

 wholly absent and the apex of the prostenial lube truncate or faintly emar- 

 ginate, with the sides of the eniarginiitinn slightly prominent. Length 

 5-6 mm. 



Wells, Vigo and Jennings counties; scarce, -huie ll-Scptem- 

 ber 24. 



H. curtains Lee, without trace of subhumeral stri:c, but with a 

 short humeral appendix, is known from Pennsylvania and Illinois. 



Gkoup C. 



In this group the front margin of the mesosternum is truncate 

 and the side pieces of meso- and metasterna grooved. Seven species 

 occur in the State. 



KEY TO SPECIES OF GEOCP C. 



0. Elytra bicolored. black and red; epipleura very narrow with one stria. 



1155. BIMArUI..\TUS. 



(/(/. Klytni wholly lilack: epipleura broader, with two stri.T. 



h. Elytra with two subhumeral strijie, the outer entire; thorax with but 

 one marginal stria. 11.50. sEDEciMS'nuATrs. 



hi). Elytra without subhumeral stria, 

 c. Elytra with five entire dorsal stria\ 

 a. Thorax with two marginal stria^ the outer one short. 



c. Surface smooth. 1157. ameeicanus. 



ee. Surface distinctly punctured. 115.S. peeplexus. 



(}il. Thorax with only the inner stria jiresent. 1159. exaeatus. 



<r. Elytra with four entire dorsal stria' or less. 



/. Four entire dorsal stria? present; epipleura with two stria>. 



IIGO. NTTBIMIS. 



ff. Three entire (lersal siria' presenl, (lie fourth short, liasal; epi- 

 pleura with three stria'. 1161. pollutus. 



