TTTK rsnOT^ND BEF.TLES. 119 



192 (740). Badistek micans Lee. l*roc. I'liil. Acad. Nnt. Sci.. II. 1S44, 52. 

 Elongate-nvnl. Above piceons with a bluish luster, the liead darker; 

 aiitennjTe dusky brown, tlie liasnl Juinl paler. Thorax oiie-hali' wider tliaii 

 long, the basal iini)ressi<iiis broader and more shallow than in l(iii<'<i)x. 

 Elytral strue feebly impressed: intervals flat. Length 5.5-G mm. 



Kosciusko roiiiity; rare. Octoher 29. 



litM (741). Baoister rkfi.kxis Lee.. Trans. Amer. Va\\. Soc., VIII, 1880, 

 IGO. 

 Elongate-oval, slender. Piceous, feebly shining, the narrow margin of 

 thorax and elytra dull yellow, translucent ; antennm dusky, tip of last 

 joint paler; legs dull yellow. Thorax slightly wider than loug, trapezoidal, 

 narrowed behind; basal impressions and median line deep; margins wider 

 than in the two preceding species and more reflexed near the hind angles, 

 which are obtuse, not rounded. Elytral stri.'p fine ; intervals broad, nearly 

 Hat. Length 4 mm. 



Laporte. IMarshall, Vigo and Knox connties; rare. May 20-Sep- 

 tember 2. 



Tribe VIIT. PLATYNINI. 



Beetles of medium or small size, having the antennae slender, 

 arising from beneath a slight frontal ridge, three basal .ioints gla- 

 brous; head oval, rarely elongate, the eyes not very distant from 

 thorax ; mandibles moderately prominent, feebly curved, mthout a 

 seta in outer groove; mentum deeply emarginate, toothed or not. 

 Thorax variable in form Avith a bristle-bearing puncture at sides 

 and a second at or in front of the hind angle. Elytra margined at 

 base, sides narrowly reflexed, apex obliquely sinuate, disk striate 

 and in our species with dorsal punctures. Prosternum not pro- 

 longed at tip ; hind coxae contiguous. ]Males with three joints of 

 front tarsi feebly dilated and clothed beneath with small scales. 

 Four of the five genera occur in Indiana. 



KEY TO INDIANA GENERA OF PLATYNINI. 



a. Eighth elytral stria distant from the margin, not deeply impressed; 

 thorax truncate or emarginate at base. 

 &. Tarsal claws more or less serrate ; mentum toothed ; tarsi glabrous 

 above. XXXI. Calathus. 



bb. Tarsal claws not serrate. 



c. Mentum toothed. XXXII. Platynus. 



cc. Mentum not toothed. XXXIII. Olistiiopis. 



aa. Eighth elytral stria united witli the margin in its basal half, deeply 



impressed and reaching the snlure. XXXIV. Perigona. 



