720 FAjriLT XXXVII. ELATETtlD^. 



XVI. Cardiophorus Esch. 1836. (Gr., "heart + bearing.") 



Small convex species, clothed with more or less abundant, pros- 

 trate pubescence. The antennfc usually vary considerably in the 

 two sexes, those of the male longer and with joints 3 to 10 broader 

 in the middle than in the female ; scutellum distinctly heart-shaped, 

 emarginate at base. The North American species are treated by 



Blanchard. — "Revision of the species of Cordiophorus Esch. of 

 America North of ]\lexico," in Trans. Amer. Ent. Soc, XVI, 

 1889, 1-27. 



In this paper 31 species are recognized, three of which have 

 been taken in Indiana, while two others may occur. 



KEY TO INDIANA SPECIES OF CAEDIOPHOBCS. 



a. Thorax with hind angles obliquely truncate ; elytra each usually with 

 two yellow spots ; hind margin of side pieces of prosternum straight. 



1355. CAEDISCE. 



aa. Thorax with hind angles produced and carinate; elytra without spots; 



hind margins of side pieces of jjrosternum with a deep notch next to 



the outer angle. 



h. Sides of mesosternal cavity prominent and nearly vertical in front; 



upper surface densely covered with short prostrate yellowish hairs ; 



legs reddish-yellow. 1356. convexus. 



66. Sides of mesosternal cavity not prominent, oblique In front. 



c. Second joint o* antennaj longer than wide and more than one-half 

 as long as third. 

 d. Prosternal process margined behind the coxa? ; pubescence of 

 upper surface sparse ; legs wholly black. 1357. qagates. 



dd. Prosternal process not margined behind the coxre ; tarsi reddish- 

 brown. CONVEXULt'S. 

 cc. Second ,1oint of antenna small, one-half as long as third; pro- 

 sternal spine distinctly margined; surface feebly bronzed. 



EOBtlSTUS. 



1355 (4104). Caediophoeus cardisce Say, Trans. Amer. Phil. Soc, VI, 

 1836, 169; ibid. II, 604. 

 Elongate, convex. Black, rather thickly clothed with short grayish 

 pubescence ; elytra each with a yellow spot before the middle and another 

 before the apex ; these variable in size and shape, sometimes wholly lack- 

 ing, the front one sometimes extending obliquely forward to the humerus; 

 legs black, knees and tarsi reddish-yellow. Thorax very convex, slightly 

 longer than wide, sides rounded, less narrowed behind than in front. Ely- 

 tral striaa punctate; intervals feebly convex, punctulate. Body beneath 

 shining, punctulate ^^'^th finer and coarser punctures intermingled. Length 

 5.5-7.5 mm. 



Frequent lioneath rubbish along the beach of Lake Michigan 

 l\rav 13-June 15. 



