124 FAMILY TF. - CA 



KKV TO SPECIES OK GROUP B. 



u. Form ratlier broad; elytra! strife deep. 

 I. Black, shining; elytral intervals convex. 



f. Larger. 12-14 nun., more depressed; elytra more deeply sinuate 



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



not punctured. 200. DECENS. 



re. Smaller. 11 mm., less (It-pressed; hind angles of thorax rectangu- 



lar: side pieces of metathi.rax punctured. 201. SINUATUS. 



lib. Snbopaque; elytral intervals flat, the strhc less deep; hind angles of 



thorax obtusely rounded. 202. OPACULVS. 



(/(/. Form slender ; antenn;e and legs very long ; elytral strhe fine. 



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



of thorax not paler. 



c. 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 antenna 1 pale reddish-brown : 



intervals not alutaceous. 204. REFLEXUS. 



'/*/. Elytra each with four or five dorsal punctures; dark reddish-brown. 



the margin of thorax translucent. 2O5. PARMAKGINATI s. 



200 (705). PLATYPUS DECENS Say. Trans. Amer. Phil. Soc., II, 1823. 53; 

 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 

 striae 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 

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



201 (700). PLATYNUS SINUATUS Dej., Spec.. III. 



108. 



Resembles ileccns but smaller, less depressed and 

 mi. re shining. Basal impressions of thorax wider. 

 Klytra less deeply striate. finely punctured; in- 

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

 74.) 



Throughout the State; scarce. April 10- 

 August 13. 



21)2 (707). PLATYNUS OPACULUS Lee., New Spec. 

 N. Amer. Col., I, 1803, 8. 



Rather slender, depressed. Dull piceous or sub- 

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



