16 NATHAN BANKS. 



H(^PLOPHORID.E. 



This foniily differs considerably from the Oribatida?. The eeplia- 

 h)thorax is movable, and the dorsal integument of the abdomen is 

 continued down upon the sides and venter, leaving only a small vimi- 

 tral region or true venter, which contains the usual apertures. The 

 legs are shorter and the coxse more free tlian in most Oribatids. 



One claw to tarsus, ventral region broad Ho|>l4»|>liora. 



Three claws to tai'sus, ventral region narrow Tril ia^ 



TKITIA Herl. 

 Body more or less oblong, cs})ecially in the young ; tarsi with 

 three claws ; ventral region very narrow, several times as long as 

 broad. 



Tritia glabrata Say. 



Oiibiifd (jJahnda Say. I'ouip. Writ. LeConte Ed. 

 Iloplophuni (ircfdta Rilcy, vi, Mo. Rept. 1874. 

 Length 1. nun. Dark red-brown; cephalothorax a little longer than broad, 

 broadly rounded in front, wholly covering the head, smooth, a few haii-s in front, 

 at each posterior angle a round stigmata with a simple seta: legs very short, 

 smooth, with simple haii-s: abdomen large, high, very convex, truncate in front, 

 smooth, anterior sides oblitiue, ncai'ly meeting on the venter, only leaving a very 

 narrow slit, which contains a long cleft ridge, the anterior portion being the 

 genital opening, and is terminated by a transv^erse line; on ejwh side of the slit 

 near the tij) is a tine hair; above on the dorsum several scattered, quite long, and 

 very fijie liaivs. 



Common on the groiuid. Sea Cliff, N. Y. Say's specimen was 

 from Florida. Dr. Riley's H. arctnta, from Missouri, is, I think, 

 only the young of this .species, at least it agrees well with the forms 

 which I take to be the yoiuig fountl on Long Island. 



HOI*I.OPH€»R.4 Koch. 

 Body usually globose, one claw to tarsus, venter tpiite broad, the 

 ai)ertinvs usually broader than long. 



Hoplopliora setosa uov. sp.— Length .(i nun. Cephalothorax and legs 

 yellowish, abdomen dark brown ; cephalothorax once and a fourth as long as 

 broad, somewhat pointed in front, above showing two large lateral depressions ; 

 stigmata circular bearing a clavate seta, a pair* of superior bristles near base and 

 a pair of short stitF ones in fi'ont ; legs short, finely granulate, and with simple 

 haire, some very long; abdomen high, globose, convex, smooth, with a basal 

 transverse row of four long bristles, and behind with two longitudinal rows of 

 about four long bristles, the longest bristles are as long as the cephalothorax ; 

 venter broad, genital opening broader than long, connate with the equal, poste- 

 riorly I'ounded. anal opening, three hairs on each side of the venter. 

 Sea Clitf, X. Y. On the ground. 



Holopliura »i«|»li«eriila uov. sp. — Length .(> mm. Similar to //. sctosn, but 

 tae body is more globose and higher, and the bristles are not one half so loug^ 

 barely longer than the setse, six pairs of them above ; the sette are thick, but 

 taper to a sharp point, spatulate rather than clavate ; otherwise about the same. 



Three specimens. Sea Cliff, N. Y. 



