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 (JENEEA OE CYCHEAMINI. 



a. Mesosternuiu protuberant in front; middle coxte widely separated. 

 6. Body glabrous; punctures of elj'tra in rows; prosternum prolonged, 

 broadly dilated at tip. covering entirely the mesosternum. 



XV. I'SILOPYGA. 



66. Body puljosr-ent ; punctures of elytra confused ; prosternum less pro- 

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



XVI. Ampiiickossus. 

 00. Mesosternum small, oblique, not protuberant in front; middle coxte nar- 

 rowly separated. 

 c. Body glabrous; bind tarsi longer than the others. 



XVII. Pallodes. 

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



XVIII. Oychbamus. 



XV. PsiLOPYGA Lec. 1S5.J. 



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. jMales with a small additional seg- 

 ment. The genus P^jjliypijga is said by Dr. Sharp to be distinct 

 from Oxycnemus Br. 



1242 (3742). Psiix)pyga histbina Lec., Proc. Phil. Acad. Nat. Scl., VI, 

 1853, 287. 



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



ly punctured. Thorax more than twice as wide as ji^^^Si £ 



long, narrowed in front, apex broadly emarginate; /^ '""''^•JI 



base curved, sinuate each side of median lobe; disk / i'.— -^. 



sparsely, rather finely punctured, with a double row I / lf"'''''''>:R\ 



of larger punctures near the apex. Elytra as broad ^ \ •^^'•-■'••i A\ 



as long, each with ten rows of rather coarse punc- \ ■■;,!.!■ / 1\ 



tures; intervals slightly convex, sparsely and irregu- \ ^.r~^ \ 



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



Montgomery County ; rare. July 4. Occurs '^^^ 2""- '^'^'"='' ^""-^ 

 in the stink-horn fungus. 



