TITK OTfOUND BKKTT>KS. 120 



•.:m',> (7s<;). I'laiym s i;i;k.\ns S;i.v. .Imii'ii. I'liil. Acail. Nal. S<i., 111. |S-."'., 

 147 ; ibid. 11, 'J4. 

 Elougate-oval, rather broad. Head and liiurax bluish-green, elytra 

 witli a brassy tiuge; uuder surface black. Thorax one-third wider than 

 liinu. niucli narrowed behind, hind angles rounded (ir obtuse. Elytral striie 

 ii:ii-i-ci\\ . sh;ill(i\\ ; intorxals Ihil. l.t-nglii 7 s mm 



Lake ( "(Uiiil \ ; rare. -I line 21. 



I'll! (7St;a). I'l.ATVM s SI r.coKDA 1 IS Loc, Agass. Lake Sup.. ls.'i(». -JO't. 



Differs from the preceding by the characters given in key and by hav- 

 ing the thorax less narrowed behind and tlie basal iuiiiressious more dis- 

 tinctly i)unctured. The elytra are i)roi)(;i-ti()inilly broader, the intervals 

 very slightly convex and more distinctly alutaceous. I.ength 7.5 -S. 5 mm. 



Nortliern third of State, frequent: T<^nox County, rare. May 

 ;5-Oetober 17. Occurs beoeath imbbisli along- the borders of lakes 

 and marshes. Appears sufficiently distinct to take specific rank. 



::ll (7.S7). Platynus mcerens Dej., Sitec. 111. 1S27. 152. 



Klongate-oval, rather slender. I'iceous black. Thor.ix subrotund. a 

 little wider than long, basal impressions broad, shallow, hind angles <ib- 

 iiisely rounded. Elytral stri;xi not punctured, the second puncture on third 

 iiilcival close to second stria. I.eugth S-S.5 uim. 



Starke, Vigo and Knox counties ; rare. July 6-October 8. 



1!I2 (788). Platynus tenuis Lee. Proc. Phil. Acad. Nat. Sci., 185-1, 4.S. 



Elongate-oval, rather slender. Piceous or bronzed-black, shining. 

 Thorax subrotund, wider than in the preceding, the margin more narrowly 

 yet distinctly reflexed, the base and hind angles more rounded than in 

 iiiwrens. Elytra one-half wider than thorax, broadly depressed behind 

 the scutellum; stria? tine, not or very imlistinclly pun<'tured; intervals Hal 

 or slightly convex. Length 9 9.5 mm. 



Laporte, Marshall and Kosciusko counties, scarce; also in 

 Webster collection. August 17-October 29. In this and the next 

 three species the second dorsal puncture is on or near the third 

 stria. 



213 (789). Platynus coli^vkis Say. Tr.-ins. Amer. Phil. Soc, IV, is:u. 

 470; ibid. II, 534. 

 Elongate-oval. P>lack with a tinge of [nirple, shining; tibia? and tarsi 

 piceous. Thorax suljquadrate. wider than long, the margins narrow in 

 front, broader and strongly retlexed toward the hind angles, which are 

 very obtuse. Elytra with acutely impressed striie. strongly and regularly 

 imnctured; intervals tlat. Length 8.7-9.5 mm. 



Described from Posey County ; more common southward. I 

 have not seen a specimen from the State. 



