608 



FAMILY XXV. IIISTERTD M . 



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

 finely, punctured. Front tibia? 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 subhumerai, fourth, fifth and sutural stria? are often partially 

 represented by detached punctures and the sutural rarely reaches 

 apex. 



1153a (3496). Hister depurator incertus Marsuel, Mon. Hist., 1854, 269. 



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

 epipleura tri-striate. Length 5-6 mm. 



Yigo County; scarce. June 11. 



1154 (3495). Hister fuetiyus Lee, Proc. Phil. Acad. Nat. Sci., 1859, 313. 



Resembles depurator, differing only in having the subhumerai stria 

 wholly absent and the apex of the prosternal lobe truncate or faintly einar- 

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

 5-6 mm. 



Wells, Vigo and Jennings counties; scarce. June 11-Septem- 

 ber 24. 



H. curtains Lee, without trace of subhumerai stria*, but with a 

 short humeral appendix, is known from Pennsylvania and Illinois. 



Group C. 



In this group the front margin of the mesosternum is truncate 

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

 occur in the State. 



KEY TO SPECIES OF GROUP C. 



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



1155. BI MACE LA TU S . 



an. Elytra wholly black: epipleura broader, with two stria?. 



I. Elytra with two subhumerai stria?, the outer entire; thorax with but 



one marginal stria. 1156. sedkcimstriatits. 



1)1). Elytra without subhumerai stria. 



c. Elytra with five entire dorsal stria?. 

 d. Thorax with two marginal stria?, the outer one short. 



e. Surface smooth. 1157. amebicantjs. 



ce. Surface distinctly punctured. 1158. perplexus. 



(Id. -Thorax with only the inner stria present. 1159. exaratus. 



cc. Elytra with four entire dorsal stria? or less. 



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



1160. nubiles. 



ff. Three entire dorsal stria? present, the fourth short, basal ; epi- 

 pleura with three stria?. 1161. poixtjtus. 



