THE SAP-FEEDING BEETLES. 645 



^ 



Franklin County; scarce. May 13. Occurs on flowers of nettle 

 and other plants. 



Tribe IV. CYCHRAMINI. 



Rounded or oval convex species, living mostly in fungi and hav- 

 ing the thorax margined at base and covering the base of elytra, 

 which in turn cover the abdomen, so as to leave only the tip of the 

 terminal segment exposed; head more or less deflexed; labrum dis- 

 tinct; prosternum more or less prolonged at apex. Four of the 

 six genera composing the tribe have been taken in the State. 



KEY TO INDIANA GENERA OF CYCHRAMINI. 



a. Mesosternum protuberant in front: middle coxre widely separated. 

 6. Body glabrous; punctures of elytra in rows; prosternum prolonged, 

 broadly dilated at tip, covering entirely the mesosternum. 



XV. PSILOPYOA. 



l>b. Body pubescent; punctures of elytra confused; prostornum less pro- 

 longed, feebly dilated at tip. not covering entirely the mesosternum. 



XVI. AMPIIICROSSUS. 



aa. Mesostenium small, oblique, not protuberant in front; middle coxa? nar- 

 rowly separated. 

 c. Body glabrous: hind tarsi longer than the others. 



XVII. PALLODES. 

 cc. Body pubescent ; all the tarsi equal in length. 



XVIII. CYCHRAMUS. 



XV. PSILOPYGA Lee. 1853. 



Labrum prominent, deeply bilobed; antennal club abrupt, oval, 

 three-jointed, the grooves deep, subocular; base of thorax with a 

 short truncate lobe; scutellum large, broadly triangular; elytra 

 truncate; front tarsi dilated. Males with a small additional seg- 

 ment. The genus Psylopyga is said by Dr. Sharp to be distinct 

 from Oxycnemus Er. 



1242 (3742). PSILOPYGA HISTRINA Lee., Proc. Phil. Acad. Nat. Sci., VI, 



1853, 287. 



Broadly oval, robust. Black, shining. Head coarse- 

 ly punctured. Thorax more than twice as wide as 

 long, narrowed in front, apex broadly emarginate; 

 base curved, sinuate each side of median lobe; disk 

 sparsely, rather finely punctured, with a double row 

 of larger punctures near the apex. Elytra as broad * 

 as long, each with ten rows of rather coarse punc- 

 tures; intervals slightly convex, sparsely and irregu- 

 larly punctate. Length 5 mm. (Fig. 241a.) 



Montgomery County ; rare. July 4. Occurs ^ 241a - (After H ril -> 

 in the stink-horn fungus. 



