270 



FAMILY VI. HTDROPHILIDiE. 



XIX. Cryptopleurum Muls. 1844. (Gr., " hidden abreast.") 



This genus differs from Cercyon by having the prosternum ele- 

 vated before the front coxae to form a rather large, five-sided area 

 widely separating the coxee ; mesosternum with a similar area widely 

 separating the middle coxae; metasternal area broad, extending 

 across the body ; sides of thorax reflexed and angulate near middle, 

 the angle not visible from above. Two species are known, both of 

 which occur in Indiana. 



KEY TO INDIANA SPECIES OF CEYPTOPLEUEUM. 



a. Elytra] intervals distinctly punctate throughout their entire extent; 

 striae not conspicuously coarsely punctate. 529. minutum. 



aa. Elytra] intervals feebly punctate on basal half only; striae coarsely 

 punctured at base. 530. amebicanum. 



529 (1690). Ceyptopleueum minuttjm Fab., Syst. Ent, 1798, 68. 



Rather broadly oval, more narrowed behind than in front, convex. 

 Piceous black, feebly shining; elytra with an indefinite pale space at tip; 

 antennae and palpi piceous. Thorax narrowed from base to apex, sides 

 feebly curved, surface rather coarsely punctate. Elytra rather deeply stri- 

 ate ; intervals slightly convex, closely and distinctly punctulate and sparse- 

 ly pubescent. Length 1.5-2 mm. 



Kosciusko, Marion and Vigo counties; scarce; April 12-Octo- 

 ber 9. Taken in decaying fungi and beneath dead turtles and 

 chickens. In one specimen at hand the pale reddish space at apex 

 of elytra extends over three-fourths of the surface. 



530 (9339). Ceyptopleueum ameeicanum Horn, Trans. Amer. Ent. Soc. 



XVII, 1890, 311. 



Resembles minutum in form and color; antennae and palpi pale red- 

 dish-yellow. Thorax more coarsely punctate than the head. Elytra deeply 

 striate, striae coarsely and closely punctate near base, more finely on apical 

 half ; intervals sparsely and finely punctate on basal half only. Metasternal 

 area more coarsely and sparsely punctured than in minutum. Length 1.7- 

 2 mm. 



Marion and Crawford counties; scarce. March 23-April 23. 

 Known heretcf ore only from Ohio. 



XX. Ph^enonotum Sharp. 1882. (Gr., "to show + back.") 



Bather small black species having the antennae 9- jointed, the 

 club joints loosely united; prostemum short, not carinate between 

 the coxae. 



531 (1685). Ph^enonotum esteiatum Say, Bost. Journ. Nat. Hist., I, 171; 



ibid. II, 646.- 



Rather broadly oval, strongly convex. Piceous black, shining; antennae 

 dull yellow, the club fuscous. Thorax very finely punctate. Elytra more 



