570 FAMILY XXir. ("RVPTOPTIAOID.E. 



thickciiiiiti's : clyti'n i-dimdiMl licliiiid. ciitircly covo-inii" the nl)(l<)ineii, 

 llic latter witli tive U-cr \ciitial scjiiueiits. 1 lie iirst usually soiiicwhat 

 loiiy'er than the others; iroiit ros.iv oval, moderate in size, sei)arated 

 hy the prosternum. the coxal cavities usually widely open behind; 

 legs short, tarsi o-joiuted, the hind ones 4-.ioint("d in the males of 

 certain genera, the joints eloth(u1 Ix'ncalh \vi1h loiii^- haii*. (Fig. 

 214.) 



The family is closely allied to the (Uicujidiv, but the ])roader 

 and shoi-tcr convex l)ody. the oval front coxa* and the usually greater 

 Iciiglh of the first \eiitral segment are sufficient to distinguish the 

 two. The prin'-i])al. and ])ractieally the only, paper treating of the 

 North American representatives of the family is that of: 



Cosey. — "Keview of the American Cryptophagida'," in Journ. 

 X. Y. Ent. Soc. VI U. 1900, 75-128. 



In it he has placed the geinis DipIoccRlus, assigned by LeConte 

 and Horn fo the Myeetophagida?, and has listed and described from 

 North America 127 s])ecies, distributed among 16 genera. For con- 

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



KEY TO SlfBFAMIIJKS OV (HYI'TOPlIACan.K. 



a. Autemue remotely separated at l)nse, inserted under tlie sides of tlie 

 fi'out; palpi dissimilar, the maxillary elongate and slender, with the 

 fonrth .ioint elongate and more or less acnminate at tip, the laltial 

 shdi'f witli the lust Jeint ev.il »v hatchet-shaped. 



Subfamily I. Cryptopiiagin.e, p. 570. 



(Id. Antenn;e close togetlier at base, inserted en the front; palpi similar, 



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



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



Sublaniily 1. CRYPTOPHAGINAE. 



The species of this subfamily ai'(^ geiu^rally larger, more oblong, 

 less convex and moi'e pni)escent than in the Atomariina^ Of the 

 127 species accredited the Family by Casey, 51) l)('long here. 



Ki:v TO 1X1)1 ANA (;i:.\i;i;a of chvptophagin.k. 



". Thora.x with two line r.iiseil lines on ea<'h side of the disk; anteiinni 

 grooves before the eyes mirrow .-nid deep: trochanters meder:Ue in 

 size, very obliquely attached :it the side of the base of the femnrn. 



I. DU'LOCdOMS. 



(Id. Thorax without i-nised lines on the disk (except in Crosiitiiis) ; aii- 

 tenual gfonves ol.solele: 1 i-oclianUTS elniigale, iteai-jiig tlie fenmiM 

 <>i>li(|uely .■itlached lo llieir rmler ends: .•intennal dnli alw-.-iys liMisely 

 ."'.-.jointed 



'/. t'l-ont coxa! cavilies c plelely clnsed behind: lirsl ventral segment 



but lillle longer tlian second and uil b two straiglil raised lines 



