THE GROUND BEETLES. 107 



160 (GOT). AMARA PROTENSA Putz.. Mem. Liege, 1. 1866, 183. 



Obloiig-ov.il, moderately convex. Purplish-black or bronzed, alutaceous 

 in both sexes, more strongly in females ; antennae and legs piceous ; under 

 surface black. Thorax two-thirds wider than long, very distinctly wider 

 at base than apex ; basal impressions very faint, not punctured ; hind angles 

 subrectangular. Elytra slightly wider than thorax, finely striate, the stria; 

 smooth. Length 7.5-8.5 mm. 



Laporte County ; rare. May 20. A species of northern range 

 which probably occurs throughout the northern third of the State. 



161 (668). AMARA POLITA Lee., Ann. Lye. Nat. Hist., IV, 1848, 364. 



Oval, moderately convex. Bronzed or blackish-bronzed, shining, often 

 with a bluish tinge; femora black, tibia- and tarsi reddish-brown. Thorax 

 nearly twice as wide as long, narrowed from about one-third in front of 

 base, hind angles rectangular; basal impressions small, deep, not punctured. 

 Elytra very slightly wider than thorax, the strhe smooth. Length 6.2-7 mm. 



Lake and Pulaski counties; scarce. March 26-June 26. Easily 

 recognized by the carinate antenna 3 , oblique outer basal depression 

 of thorax and smaller size. 



A. pallipes Kirby. 5.5-8 mm., and A. crassispina Lee., 7.2-9 mm. 

 in length, are members of the boreal fauna ranging from Massa- 

 chusetts to Lake Superior and Wisconsin, and probably occur 'in 

 the northern counties of Indiana. 



GROUP C. 



This group of eight species comprises the Indiana members of 

 the subgenus Celia and includes our largest and smallest species of 

 Amara. For the most part they are oval, brown or piceous, rarely 

 bronzed species, having the thorax broadest at base, the hind tibiae 

 never pubescent on inner side in males, and the ocellate puncture 

 at base of scutellar stria always lacking. 



KEV TO INDIANA SPECIES OF GROUP C. 



. Antennae and legs piceous black. 



l>. Elytra strongly alutaceous, the intervals more or less uneven. 



162. INTERSTITIALIS. 



bb. Elytra shining; intervals flat, smooth and even. 163. ERRATICA. 



no. Antenna? pale, legs usually so. 



c. Size very large for the genus, 9-12 mm.; prostenmm with a number 



of 'setae (bristly hairs) at tip. 164. OBESA. 



cc. Size medium or small, not over 8 mm. : prosteruum with either two 



setae or none at tip. 

 d. Prosternum of male with an irregular group of small punctures 



near the middle. 



e. Sides of thorax distinctly flattened : prostemnm with two seta- 

 at tip; reddish-brown, the males shining. 



165. REMOTKSTRIATA. 



