THE HISTER BEETLES. 



609 



1155 (3507). Hister bimaculatus Linn., Syst. Nat, XI, 567. 

 Oblong-ovate, convex. Elytra black, with the outer diagonal half 



orange red. Thorax with one tine marginal stria, abbreviated at tip ; disk 

 minutely punctulate and with a broad shallow impression on each side near 

 the front angles. Elytra with five entire striae, the sutural extending in 

 front of the middle ; the subhumeral absent. Front tibiae with three teeth ; 

 mesosternum truncate. Length 4.5 mm. 



Vigo County; rare. April 13. 



1156 (3505). Hister sedecimstriatus Say, Journ. Phil. Acad. Nat. ScL, 



V, 1825, 36 ; ibid. II, 263. 

 Rounded-oval, convex. Thorax with inner marginal stria entire, outer 

 wholly absent. Elytra with five entire dorsal striae, the fifth arching at 

 base and joining the sutural, and with two subhumerals, the outer entire, 

 the inner on apical half only. Front tibiae with three teeth, the apical one 

 finely bifid. Length 4-5 mm. 



Southern half of State ; frequent. May 2-September 10. A 

 prettily and well marked species, common locally beneath carrion 

 and in excrement. 



*1157 (3507). Hister americanus Payk., Monograph Hist., 1811, 31. 



Rounded-oval, moderately convex. Thorax with inner stria entire, the 

 outer varying from a mere arc at front angle to nearly entire. Elytra with 

 five entire striae, the fifth curved at base and often joining the sutural ; sub- 

 humeral absent. Upper surface smooth. Front tibiae with three teeth, the 

 apical one prominent and finely bifid. Length 3-4 mm. 



Throughout the State ; one of the most common of the family. 

 Hibernates. January 6-October 9. Occurs usually beneath logs or 

 bark in low moist woods. Horn says that the fifth dorsal very 

 rarely joins the sutural but in one-third of the 25 or more specimens 

 at hand the two are united, while in one specimen they unite on one 

 side and not on the other. 



1158 (3508). Hister ferplexus Lee, New Spec. N. Amer. Col., I, 1863, 61. 



Closely allied to americanus but larger, more oblong and distinctly but 

 sparsely and finely punctured. Elytral striae more strongly impressed and 

 punctured, the fifth joining the sutural. Length 4-5 mm. 



Lake. T aporte. Kosciusko, Marion, Putnam and Posey counties; 

 scarce. April 18-June 9. Occurs in same localities as ameri- 

 canus and, as Horn suggests, it will probably prove only a better 

 developed geographical race of that species. In one specimen at 

 hand, with surface distinctly punctured, the elytral stria? are not 

 punctured and the fifth does not join the sutural. In another the 

 outer thoracic stria is very fine and entire. 



