364 



Length, 0.48 mm.; breadth, 0.34 mm. 



Collected by the writer at Areola, 111. One specimen. 



Oribata banksi, n. sp. (Fig. 2 and 3, pp. 339, 340.) 



Dark chestnut-brown, integument heavily chitinized; sur- 

 face pitted. 



Cephalothorax about a third as long as the abdomen; la- 

 melhe blade-like, about half as long as cephalothorax, broadest 

 at the anterior end, without cusps; lamellar hairs straight, 

 pectinate, and about as long as the cephalothorax; first pair of 

 tectopedia very similar to lamellae; second pair round, cup-like. 

 Pseudostigmata cylindrical, distal end cup-shaped; pseudo 

 stigmatic organ slightly recurved. 



Abdomen two thirds as broad as long, the dorsum with 

 four rows of long, curved, pectinate bristles, about five in each 

 row; pteromorplne large, truncate in front, not extending in 

 front of the anterior margin of abdomen, but extending back- 

 ward about half the length of the abdomen; anal and genital 

 covers rectangular, the anal ones a third longer than the 

 genital ones. 



Legs stout; anterior pair about as long as the abdomen; 

 third pair smallest; femur of leg I about two thirds as long as 

 the cephalothorax. 



Length, 0.54 mm.; breadth, 0.40 mm. 



Under bark of dead trees and under rubbish of various 

 kinds. Collected by the author at Hal ton, Areola, and Homer, 

 111., and by C. A. Hart from pitcher-plants (Sarracenia purpurea) 

 in bog at Cedar Lake, 111. Several specimens. 



Family NOTHRIDvE. 



Cephalothorax and abdomen immovably fused or coalesc- 

 ing; body never compressed; tracheae opening at the acetabula 

 of the legs; abdomen without wings; integument frequently 

 rough, sculptured, or reticulate, and sometimes very little 

 chitinized; legs frequently very stout, sometimes long and 

 moniliform. 



