Eiving — 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 Areola and Urbana, 111. Described from four 

 specimens. 



Uropoda fusca n. sp. 



PL XL f. 33. 



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, 111. 



Uropoda i)allida n. sp. 



PI. 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. Mandil)les with stout, den- 

 tate chelae, 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. Perltreme In 

 the form of two loops, an anterior loop which is the largest nnd (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 tlie abdomen. 



