edge being smooth; interlamellar hairs short and pectinate, in- 

 clined away from the median plane; rostral hairs small and 

 curved. 



Abdomen twice as long as broad, hairless, dorsum ir- 

 regularly covered with small denticles; pteromorphse very long 

 and narrow, truncate in front; anal covers very much enlarged, 

 being twice as long as the genital covers; genital covers narrow 

 and situated about twice their length in front of the anal covers. 



Legs small, first pair projecting about one third their length 

 beyond the rostrum. 



Length, 0.54 mm.; breadth, 0.28 mm. 



In moss. Collected by the writer at Homer, 111. One 

 specimen. 



Oribata illinolsensis, n. sp. (PI. XXXIII., Fig. 3.) 



Olive brown; integument rather thick and tough, not very- 

 resistant, somewhat rough. 



Cephalothorax about a fourth as long as abdomen; lamella? 

 broad horizontal blades about three fifths as long as the ceph- 

 alothorax, broadest towards the middle, and with small cusps; 

 lamellar hairs simple, straight, as long as the cephalothorax ; 

 three pairs of tectopedia, the first pair blade-like, the second 

 large, rounded, and ending anteriorly in a long, sharp point, 

 the third rounded; pseudostigmatic organ short and stout, with 

 short peduncle and large, pectinate, clavate head; interlamellar 

 hairs straight, pectinate, and about two thirds as long as the 

 lamellar hairs; rostral hairs stout, curved, and pectinate. 



Abdomen slightly longer than broad, hairless; pteromorphse 

 prominent, truncate in front, with concave anterior margin, 

 and extending backward about two thirds the length of the ab- 

 domen; anal and genital covers subequal; anal covers situated 

 about half their length from the posterior margin of abdomen; 

 genital covers about one and a half times their length in front 

 of the anal covers. 



Legs small, with several stout plumose bristles; the two 

 anterior pairs subequal, the first pair projecting half their 

 length in front of the rostrum. 



