THE SAP-FEEDING BEETLES. 



647 



XVIII. Cychbamus Kug. 1794. (Gr., "name of a bird.") 



The members of this genus resemble those of Amphicrossus in 

 form and pubescent surface, but differ in having the labrum feebly 

 emarginate instead of bilobed; prosternum not prolonged at tip; 

 metasternum bent upwards at tip between the coxae, but not protu- 

 berant; thorax not lobed at middle of base and seutellum of medium 

 size. One of the two known species occurs in Indiana. 



1246 ( 3748). Cychramus adustus Erichs., Germ. Zeitsch., IV, 1843, 346. 



Broadly oval, convex. Reddish-brown, opaque, pubescent; elytra with 

 the sides usually piceous, or rarely wholly black ; legs paler. Thorax twice 

 as wide as long, narrower in front, apex deeply emarginate, base truncate ; 

 sides curved, hind angles obtuse or rounded; surface rather coarsely and 

 closely punctate. Elytra as broad as long, slightly narrower behind the 

 middle ; tips obtusely truncate ; disk with fine elongate punctures arranged 

 in quite regular rows. Length 3-4 mm. 



Near Mitchell. Lawrence County ; rare. June 4-July 28. Taken 

 from fleshy white fungi. Ranges from Virginia and Pennsylvania 

 to Georgia and Missouri. 



Tribe V. CYBOCEPHALIXI. 

 This tribe is represented in our fauna by the single genus : 



XIX. Cybocephalus Erichs. 1844. (Gr., ' 'inflected + head. ") 



It comprises two minute species, the smallest of the family, hav- 

 ing the tarsi 4-jointed ; antenna? scarcely longer than the width of 

 head; prosternum acutely carinate in front, not prolonged behind 

 the front coxa? ; thorax margined at base, covering the base of ely- 

 tra ; body retractile and when so bent, ovate and very convex. One 

 of the two occurs in Indiana, 



1247 (3750). Cybocephalus xigbitulus Lee, X. Sp. X. Amer. Col., 1863, 64. 

 Ovate, convex. Black or piceous, strongly shining, very finely alu- 



taceous; legs piceous. Thorax with margin not flattened, narrowly trans- 

 lucent, surface smooth. Elytra with very fine, sparse punctures in basal 

 area. Length 1-1.5 mm. 



Dubois County; scarce. April 29. Probably throughout the 

 State, but overlooked on account of small size, as the range is given 

 as ''Michigan to Georgia." Occurs in colonies on fungus covered 

 logs. Resembles in form the species of AgatMdium of the family 

 Silphidae. 



