THE TIISTER BEETLES. 605 



00. Subhunieral strite wholly absent. 



p. Apex of prosternal lobe truncate ; epipleura witli two strlne ; 



length 5-5.5 mm. 1154. ruRTivus. 



Vp. Apex of prosternal lobe rounded ; epipleura with three strife ; 



length 4-6 mm. 1153a. incertus. 



nil. Elytra with four entire strife; outer thoracic stria abbreviated; 



form oblong; length 4.5 mm. curtatds. 



114i (3477). HisTER HARRisii Kirby, Fauna Bor. Amer., IV, 1837, 124. 



Rounded-oval, convex. Surface sparsely and equally punctured. Tho- 

 rax with two stria?, the outer entire and slightly curved at base, the inner 

 often slightly the shorter. Elytra with four entire strias, fifth extending to 

 middle, sutural longer than fifth, suliliumeral entire. Front tibiae with four 

 or five teeth, the apical shorter than tlie second. Length 4-5 mm. 



Lake, Laporte, Pulaski, Cass and Marion counties; frequent. 

 April 10-June 26. Occurs principally in cows' dung. Frequent 

 hcneatli chunks on beach of Lake ^lichigan. 



114."; (.'!471i). riisTKR MERDARirs HofCm.. Knt. ITefte., I, 0!). 



Oblong-oval, convex. Thorax with two entire stri;e which usually unite 

 at the base, the inner somewhat sinuous, a few sparsely placed punctures 

 along the sides. Elytra with four i iitire striae or with the fourth slightly 

 abbreviated at base, fifth and sutural extending to middle, subhumeral en- 

 tire, nearly straight. Frcjnt tibi;e with fotu- teeth, the apical one more 

 prominent than the second and slightly notched at tip. Proijysidimn rather 

 sjiarsely, iiynidium more densely jiunctured. Notch of mcsosternum deep 

 and broadly rounded. Length .5.5-7 mm. 



Throughout the State; fi'i'((ucnt. Api-il LTi-October 1^-t. 



1140 (.34X0). IIlSTEK TXTEHRUPTUS ItcaUV.. IllS., 1805. ISO. 



Bi'oadly ovate, convex. Tliora.x with two entire stria', not united at 

 base, the inner rarely sinuate, surface without punctures. Elj'tra with 

 three entire striffi, fourth slightly abbreviated at base, fifth very short, su- 

 tural extending in front of middle. P.^-gidium rather finely and sparsely 

 punctured. Front tibife with five teeth, the apical one shorter than the 

 second and bifid. Xotch of mesosternum broad but very shallow. Length 

 5.5-7 mm. 



Common beneath rubbi.sh along the beach of Lake Michigan ; 

 taken elsewhere only in Vigo County, where it is scarce. May 6- 

 October 11. 



1140a (.34.S2). IIistek tnterruptt's im.mtms ICrichs., Kl. .Tahrbuch, ]s:;-l. 

 143. 

 Close to intcrrnplii.'t and, in my opinion, only a variety of that species. 

 Differs by being sliorter and pro]iortionally broader, and b.y having the su- 

 tural stria very sliort or often entirely olisnlete. Front tiliife with five sub- 

 equal teeth. T>ength 5-r, mm. 



