124 FAjriLY ir. — carabiti.t;. 



KEY TO SPECIES OF GROCP B. 



u. Form rather broad; elytral strife deep. 

 6. Black, shining; elytral intervals convex. 



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

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

 not puiictured. 200. DEC^:^•^. 



ce. Smaller, 11 mm., less deinessed; hind angles of thorax rectangu- 

 lar; side pieres ot metuthi.rax punctured. 201. sinuatl's. 

 66. Subopaque; elytral intervals flat, the stri;e less deep; hind angles of 

 thorax obtusely rounded. 202. opaculis. 

 Hfl. Form slender ; antenms and legs very long ; elyti'al strife 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. 



20.3. ciNcncoLLis. 



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



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



intervals not alutaceous. 204. eeflexis. 



(Id. Elytra each with four or five dorsal punctures; dark reddish-brown. 



the margin of thorax translucent. 20.5. PARirARoiNATis. 



200 (Ttiol. I'LATYXUS DECEKS Say. Trans. Amer. Phil. Soc, II. 1S2.".. o3: 

 ibid. II, 477. 

 Rather broad, depressed. Black ; legs, antennae and margin of thorax 

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

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

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

 taceous. Length 12-14 mm. 



Lawrence and Posey counties; scarce. April 10- 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 

 i)ne-half broader than thorax and slightly sinuate near their tips. 



201 (766). Platy^jus sinuatus Dej., Spec, 111. 

 108. 

 Uesembles decciis but smaller, less depressed and 

 more shining. Basal impressions ot thorax wider. 

 Elytra less deeply striate, finely punctured: in- 

 tervals less convex. Length 10.5-11 mm. (Fi.g. 

 74.) 



Throusfhoiit the State ; scarce. April 10- 

 August 13. 



2112 {767). I'L,vTYNi'S OPACULCs Lec. New Si)ec. 

 X. Amer. Col., I, 1863. S. 

 Rather slender, deiiressed. Dull piceous or sub- 

 Fig. 74. •; 3. (Original.) opaque. Thorax as wide as long, narrowed in 



