357 



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

 specimens, 



Oribata spinogenuala, n. sp. (PI. XXXIII., Fig. 1.) 



Dark reddish brown; integument thick and brittle. 



Cephalothorax broad; lamellae horizontal and broad, being 

 broadest at the tips; lamellae with cusps; lamellar hairs as long 

 as the lamellae and pectinate; pseudostigmatic organ short, 

 with small peduncle and large clavate head; interlamellar hairs 

 long, pectinate, and straight; rostral hairs about as long as the 

 lamellar hairs and curved. 



Abdomen two thirds as broad as long; pteromorphse 

 narrow, truncate, and lying close to the sides of the body; 

 genital covers two thirds as long as the anal covers and sit- 

 uated twice their own length in front of the latter. There is a 

 row of short, stout, almost straight hairs around the margin, 

 and about eight hairs on the summit of the dorsum. 



Legs short and subequal. 



Length, 0.60 mm.; breadth, 0.46 mm. 



Collected by the writer at Areola, 111. Several specimens. 

 Oribata unimaculata Banks. 



1906. Galumna unimaculata, Banks, Proc. Acad. Nat. Sci. Phila., Nov. 1906, 

 p. 490, PI. XVIII., Fig. 33. 



Dark reddish brown; integument thick; surface smooth. 



Lamella? large, about two thirds as long as the cephalo- 

 thorax, broader anteriorly than posteriorly; lamellar cusps 

 prominent, slightly bifid in front, the long, straight, pectinate 

 lamellar hairs extending from them; translamella about a third 

 as broad as the lamellae; anterior free edge concave. There are 

 two pairs of tectopedia, of which the inner pair is the longer, 

 extending forward almost as far as do the tips of the lamellar 

 cusps, curved slightly toward the median plane, and bearing a 

 pair of long, curved, pectinate bristles. The outer pair of tec- 

 topedia are much thicker and shorter than the inner pair and 

 bear no bristles. Interlamellar hairs similar to lamellar hairs 

 but longer. Pseudostigmatic organs short and clavate, about 

 as long as the genual of leg I. 



