108 FAMILY ir. CAEARIT).^.. 



ce. Sides of thorax imt llattened: pnisteniuiu witlumt setie; pictH)Us. 

 shiniug. 166. chalcea. 



d<J. Prosteriuim of male smooth as iu the females and without setje; 

 sides of thorax not tlattened. 

 /. Elytral striie fine, the intervals flat: thorax distinctly emarj,nnate 

 at apex. 167. sub^nea. 



ff. Elytral stri;e deep, the intervals convex: thorax nearly truncate 

 at apex. 

 /;. Form oblonix ; hind an^'lcs of llinrax much rounded; sides of 

 metasternum coarsely punctate : larger, 6-7 mm. 



168. RUBRICA. 



<i<l. Form more oval: liiiid angles suhrecfangular or obtuse; me- 

 tasternum smooth : smaller, not over 5.5 nun. 



169. MUSCULUS. 



1(52 (670). .Amara interstitialis Dej.. Sp. (Jen. III. 1828, 472. 



Oblong-oval, moderately convex. Coloi- variable; brownish-bronze to 

 green, cupreous or nearly black. 'Fhorax less than twice as wide at base 

 as long, apex feebly emarginate. hind angles rectangular; basal impressions 

 usually distinct but shallow, the outer obliipie, the inner short, not jninc- 

 tured. Elytral stri;e with very fine, indistinct punctures; intervals more 

 or less convex with undulating surface. Length 7-0 nun. 



A species of nortlieni range, rarc^ in IiKliaiia. A single speci- 

 men was taken in Vigo County from beneath drift in a swamp. 

 Several others were obtained near Hessville and Wolf Lake, Lake 

 Comity, by Woleott. Mareh 26-May 26. 

 1(!o (WO). Amara erkatk a Sturm. Deutsche Ins.. VI. .'>5. 



Elongate-oval. Bronzed-cupreous or nearly- black, shining; antenn;e 

 piceous black, the two basal joints often reddish : under surface and legs 

 piceous, shining. Thorax not twice as wide at base as long at middle, sides 

 narrowing to front, hind angles rectangular; basal impressions very feeble, 

 the outer usually the smaller and obliquely jilaced; surface rarely slightly 

 punctate near the inner depressicm. Elytra finely striate, the strife finely 

 but distinctly punctured : intervals fiat or slightly convex, alutaceous in 

 female. Length 6-7.5 mm. 



Lake County: scarce. March 26-Jnne 26. A circumpolar spe- 

 cies which finds its southern limit in tlie transition life zone of 

 northern Lidiana. Although TTor-i says in his key that the surface 

 is not alutaceous it is distinctly so m the female. 



1<;i (('.74). A.MAiiA oHESA Say. Trans. .\mor. Phil. So<'.. II. 

 1S2;;, :'.7: ibid. II, 464. 

 oblong-oval, robust, nut very convex. I'iceous black, shin- 

 ing; elytra o])aque in female: antenn.ie and legs reddish- 

 brown. Thorax one-half broader than long, hind angles 

 rectangular: bas.-il IniMrfssi' us ddiiblc. linely punctate, the 

 \ outer deeper .-iiid with m cxtonial carina. Elytral s(ri:c 

 ... ^. ., moredeeply imjiressed ;il .iiiox. \(.|\ liiich |iiiii, lured. Lem^'tli 

 (.•\ftor Riloy ) 12 mm. (Fig. 6(i. ) 



