THE GROUND BEETLES. 



123 



behind, margin strongly reflexed, basal impressions deep. Elytra elliptical ; 

 striae moderately deep; intervals convex, the alternate ones with a row of 

 rather large punctures on the sides. Length 13-15 mm. (Fig. 72.) 



Vigo, Putnam, Monroe and Franklin counties ; scarce. May 8- 

 October 4. Occurs beneath stones in deep wooded ravines. 



199 (762). Platynus qijadrimaculatus Horn, Trans. Amer. Ent. Soc, 

 XII, 1885, 130. 



Elongate-oval, slender. Antennae, legs and thorax reddish-yellow ; head 

 and elytra black, the latter with basal third and large rounded subapical 

 spot reddish-yellow. Thorax somewhat cordiform, a little longer than wide, 

 narrowed at base, with an extremely narrow reflexed margin. Elytra oval, 



.big. T6. 



Fig. 72. X2;. (Original.) (After Horn.) 



broader behind ; intervals flat, the third with three very small dorsal punc- 

 tures. Length 7-7.5 mm. (Fig. 73.) 



Knox and Fosey counties; rare. April 20- April 25. Occurs 

 beneath cover in moist localities.* 



P. angustatus Dej., 13-14 mm. in length, is said to inhabit the 

 Middle and Southern States, and perhaps occurs in the hilly por- 

 tion of southern Indiana. 



Group B. 



Composed of winged species, black or piceous in color, having 

 the thorax strongly margined, basal impressions large and deep, 

 hind angles obtuse or rectangular. Elytra one-half or more 

 broader than thorax, truncate at base, more or less sinuate toward 

 the extremity, the striag fine to deep, the second striae or third in- 

 terval with three or four impressed punctures. 



*See Can. Ent. XXXVIII, 1906, p. 267. 



