570 



FAMILY XXII. — CRYPTOPIIAGIDzE. 



thickenings ; elytra rounded behind, entirely covering the abdomen,, 

 the latter with five free ventral segments, the first usually somewhat 

 longer than the others ; front coxas oval, moderate in size, separated 

 by the prosternum, the coxa! cavities usually widely open behind; 

 legs short, tarsi 5-jointed, the hind ones 4-;jointed in the males of 

 certain genera, the joints clothed beneath with long hair. (Fig. 

 214.) 



The family is closely allied to the (hicujidce, but the broader 

 and shorter convex body, the oval front coxae and the usually greater 

 length of the first ventral segment are sufficient to distinguish the 

 two. The principal, and practically the only, paper treating of the 

 North American representatives of the family is that of : 



Casey. — "Review of the American CryptophagidaB, " in Journ. 

 N. Y. Ent. Soc, VIII, 1900, 75-128. 1 



In it he has placed the genus Diplocodus, assigned by LeConte 

 and Horn to the Mycetophagidae, and has listed and described from 

 North America 127 species, distributed among 16 genera. For con- 

 venience the family is first divided into two subfamilies as follows : 



KEY TO SUBFAMILIES OF CRYPTOPHAGIDiE. 



a. Antennae remotely separated at base, inserted under the sides of the 

 front; palpi dissimilar, the maxillary elongate and slender, with the 

 fourth joint elongate and more or less acuminate at tip, the labial 

 short with the last joint oval or hatchet-shaped. 



Subfamily T. Cryptophagin^e, p. 570. 

 aa. Antenna* close together at base, inserted on the front ; palpi similar, 

 short, stout and acuminate, the last joint of both small, narrow and 

 awl-shaped. Subfamily II. Atomariin.e, p. 57S. 



Subfamily I. CRYPTOPHAGINAE. 



The species of this subfamily are generally larger, more oblong, 

 less convex and more pubescent than in the Atomariinse. Of the 

 127 species accredited the family by Casey, 59 belong here. 



KEY TO INDIANA GENERA OF CRYPTOPHAGINAE. 



a. Thorax with two fine raised lines on each side of the disk ; antenna 1 

 grooves before the eyes narrow and deep ; trochanters moderate in 

 size, very obliquely attached at the side of the base of the femora. 



I. Diploccelus. 



aa. Thorax without raised lines on the disk (except in Crosimus) ; an- 

 tenna 1 grooves obsolete; trochanters elongate, bearing the femora 

 obliquely attached to their outer ends; antenna I club always loosely 

 3-jointed 



T). Front coxal cavities completely closed behind ; first ventral segment 

 but little longer than second and with two straight raised lines 



