Ewing — New North American Acarina. 71 
femur two-thirds as broad as long. Second pair of legs stouter than the 
other pairs; hind pair the longest. Claws of the tarsi stout and in the 
case of the hind pair of legs situated on rather long pedicels. All the 
legs very sparsely clothed with hairs. 
Length, 0.76 mm.; breadth, 0.58 mm. 
Found under bark and under old logs. Collected by the 
writer at Arcola and Urbana, Ill. Described from four 
specimens. 
Uropoda fusca Nn. sp. 
PR AT FSS: 
Chestnut brown, the anterior part of the body being lighter than the 
rest. 
Body almost disc-shaped, but slightly longer than broad, with the 
anterior margin projecting somewhat. Posterior margin of the sternal 
plate of the male concave; male genital opening situated about its width 
from the posterior margin of the sternum. Anus small, situated about 
its width from the posterior margin of the abdomen. 
Anterior pair of legs about one-third as long as the body; tarsus of 
leg I over twice as long as the tibia and possessing several long hairs; 
tibia and genual subequal; femur broader than the genual, being almost 
as broad as long. Second pair of legs slightly longer than the first 
pair; tarsus of leg II one and a half times as long as the tibia; fourth 
pair of legs not extending to the posterior border of the body. All the 
legs are provided with moderately stout caruncles. 
Length, 0.50 mm.; breadth, 0.38 mm. 
Found under bark by J. Douglas Hood at Muncie, Ill. 
Uropoda pallida n. sp. 
Pl. XI. f. 34. 
Light chestnut brown, with the anterior parts paler than the pos- 
terior. 
Palpi two-thirds as long as the anterior pair of legs; distal segment 
of the palpus very small; penultimate segment subequal in length to 
the antepenultimate segment but narrower. Mandibles with stout, den- 
tate chele, the inner digit of the chela slightly surpassing the outer. 
Hypostoma peculiar in possessing besides the two common cusps, two 
lateral fork-like structures, each bearing three prongs. 
Body rounded behind but somewhat pointed in front; sparsely clothed 
with very fine hairs. Genital opening of the male situated near the 
middle of the sternal plate betwen the third pair of legs. Peritreme in 
the form of two loops, an anterior loop which is the largest and extends 
to the lateral margin of the body and a smaller posterior loop. 
Anterior pair of legs one-half as long as the body; tarsus of leg I 
longer than the genual and tibia combined and possessing rather large 
hairs on its outer margin. Last pair of legs about equal to the anterior 
pair in length and not extending to the posterior margin of the abdomen. 
