720 F AM FLY XXXVI I. EL 



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



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

 trate pubescence. The antenna; 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 

 Bl (tn,cliard. "Revision of the species of ('cn-(li(>i>h< i ux Esch. of 

 America North of .Mexico," 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 CARDIOPHORUS. 



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

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



1355. CARDISCE. 



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

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

 the outer angle. 



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

 upper surface densely covered with short prostrate yellowish hairs ; 

 legs reddish-yellow. 1356. CONVEXUS. 



6&. Sides of mesosternal cavity not prominent, oblique in front. 



c. Second joint o4' antenna- longer than wide and more than one-halt' 



as long as third. 



(1. Prosternal process margined behind the coxa 1 ; pubescence of 

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



<1<L I'rosternal process not margined behind the coxre; tarsi reddish- 

 brown. CONVEXULUS. 

 co. Second joint of antenna 1 small, one-half as long as third; pro- 

 sternal spine distinctly margined; surface feebly bronzed. 



EOBTJSTUS. 



1355 (4104). CARDiopiioRrs 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 si/e and shape, sometimes wholly lack- 

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

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

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

 tral stria- punctate; intervals feebly convex, punctulate. Body beneath 

 shining, pnnctnlate with finer and coarser punctures intermingled. Length 

 5.5-7.5 mm. 



Frequent bom-alb rubbish along the beach of Lake Michigan. 

 .Mav 13-June 15. 



