114 
PSYCHE 
[December 
each at its tij) a long, curved, serrate bristle. Psciidostigmatic organs fusiform and 
almo.st as long as the lamellae. Lamellar hairs .straight, pectinate and a little longer 
than the lamellae; inter-lamellar hairs similar to the lamellar hairs but longer. 
Abdomen slightly longer than broail, bearing about two dozen large, conspicuous, 
dentate, bri.stles. Pteromorphae about as long as the cephalothorax but lying close 
to the body and projecting al)ont one-half their length in front of the anterior margin 
of the abdomen. Genital covers smaller than the anal covers and situated about 
one and one-half times their length in front of the latter. 
Legs small; unguis tridactyle. 
Length, 0.7.5 mm.; breadth, 0.50 mm. 
Under logs. Collected by myself at Eola .Junction, Illinois. Several specimens. 
Oribata xcrratoseta n. sp. 
Figs. 12, 1.3. 
Dark brown. Cephalothorax almo.st as broad as long; [wilpi jirominent; 
lamellae narrow and about two-thirds as long as the cephalothorax; lamellar hairs 
.straight, pectinate, and extending to the tip of the ro.strnm; interlamellar hairs about 
as long as the lamellar hairs; ro.stral hairs similar to the last, ljut curved. The 
pseudostigmatic organ has a small, recurved peduncle and a large, thick, subglobose 
head. 
.\bdomen two-thirds as broad as long, with many large, curved, serrate Jjristles. 
Pteromorphae short, triangular and two-thirds as broad as long, the anterior free 
margin being straight. Anal covers larger than the genital covers and situated one 
and one-half times their length behind the latter. 
Legs large; tarsus and tibia of leg I snbequal; tibia bearing a large l)ristle a.s 
long as the segment itself. Unguis tridactyle. 
Length, 0.40 mm.; breadth, 0.30 mm. 
In moss. Collected by myself at Eola Junction, Illinois. Three .specimens. 
Phthiracarus magnus n. sp. 
Figs. 7, S. 
Dark brown; surface of integument smooth. 
Cephalothorax about one-half as long as the abdomen. A pair of short curved 
bristles occurs close to the po.sterior margin of the cephalothorax and a similar pair 
