124 



FAMILY IT. — CARABIM. 



KEY TO SPECIES OF GKOEP B. 



a. Form rather broad: elytral strife deep. 

 J). Black, shining; elytral intervals convex. 



c. Larger. 12-14 mm., more depressed: elytra more deeply sinuate 

 behind : hind angles of thorax obtuse : side pieces of metathorax 

 not punctured. 200. decexs. 



cc. Smaller. 11 mm.. less depressed; hind angles of thorax rectangu- 

 lar; side pieces of metathorax punctured. 201. sintjatus. 

 bJ). Subopaque; elytral intervals flat, the strife less deep: hind angles of 

 thorax obtusely rounded. 202. opacelus. 

 aa. Form slender; antennae and legs very long; elytral striae fine. 



d. Elytra each with three dorsal punctures; piceous brown, the margin 

 of thorax not paler, 

 e. Hind angles of thorax almost rounded; side margins strongly re- 

 flexed only on basal half ; elytral intervals alutaceous. 



203. CINCTICOLLIS. 



ee. Hind angles of thorax obtuse, not rounded; side margins strongly 

 reflexed their full length : legs and antennas pale reddish-brown ; 

 intervals not alutaceous. 204. beflexe/s. 



dd. Elytra each with four or five dorsal punctures; dark reddish-brown, 

 the margin of thorax translucent. 205. parmaegixates. 



200 (765). Platyxes decexs Say. Trans. Arner. Phil. Soc... II. 1S23. 53; 

 ibid. II.. 477. 



Rather broad, depressed. Black: legs, antenna? and margin of thorax 

 piceous. Thorax subcordate. narrowed behind, basal impressions punc- 

 tured : hind angles obtuse, margin of moderate width, reflexed. Elytral 

 striae deep, not or very obsoletely punctured; intervals convex, finely alu- 

 taceous. Length 12-14 mm. 



Lawrence and Posey counties; scarce. April K3- August 28. 

 In this and the next two species the median line and front trans- 

 verse impression of thorax are rather deep, the elytra more than 

 one-half broader than thorax and slightly sinuate near their tips. 



201 (766). Platyxes sixeates Dej.. Spec. III. 

 108. 



Resembles dec-ens but smaller, less depressed and 

 mere shining. Basal impressions of thorax wider. 

 Elytra less deeply striate, finely punctured; in- 

 tervals less convex. Length 10.5-11 mm. (Fig. 

 74.) 



Throughout the State; scarce. April 10- 

 August 13. 



202 (767). Platyxes opaceles Lee. New Spec. 

 N. Arner. Col.. I. 1863. 8. 



Rather slender, depressed. Dull piceous or sub- 

 ig. 74. < 3. (Original.) opaque. Thorax as wide as long, narrowed in 



