570 FyUmlv xxii,--CR'/i"ror'irAfiiii,i';. 



thickenings; elytra rounded behind, entirely covering the abdomen, 

 the latter ^^'ith five fre6 ventral segments, the first usually somewhat 

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

 by the prosternum, the coxal caviti&s usually widely open behind; 

 legs short, tarsi 5-jointed, the hind ones •1-jointed in the males of 

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

 214.) 



The family is closely allied to the Cncujidit', but the broader 

 and shorter convex body, the oval front coxeb 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 Cryptophagidee, " in Journ. 

 N. T. Ent. Soc, VIII, 1900, 75-128. 



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

 and Horn to th" ^lycetophagida;, 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 OK CHYPTOPHAQIDjE. 



a. Antennte remotely seijarated at base, his(>i-tecl under the sides of the 

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

 fourth joint el(in,s;ato and more ov less acuminate at tip, the labial 

 short with the last joint oval or hatchet-shaped. 



Subfamily \. (^ryptoph.vgin^, 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. Atom.^min.e, p. 578. 



Subfamily I. CRYPTOPHAGINAE. 



The species of this .subfamily arc generally larger, more oblong, 

 less convex and more pubescent than in the Atomariinaj, Of the 

 127 species acci'cdited the family by Casey. 50 belong here. 



KEY TO INDIANA GENERA OF CRYPTOPII.SGIN.B. 



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

 grooves before the eyes narrow and deep; trochanters moderate in 

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



I. DiPLOCCELrS. 



(la. Thorax without raised lines on the disk (except in Cnsimux) ; an- 



tennal grooves obsolete; Irocliauters clongalc, bearing the femora 



obliquely , attached to their outer ends: antennal club always loosely 



•'i-jointed 



h. Front coxal cavities completely closed lichind ; first ventral segment 



but lidlc longer tlian second and with two straight raised lines 



