377 



pair of small hairs; pseudostigmatic organ small, scarcely visible, 

 clavate, and simple. Palpi and labial organs prominent. 



Abdomen almost as broad as long, rounded behind, with 

 three rows of long bristles on each side of the dorsum, the inner 

 row having the largest bristles; three bristles in each of the 

 outer rows. 



Legs subequal, with many long hairs. 



Length, 0.84 mm.; height, 0.56 mm. 



In decayed wood. Collected by myself at Areola, 111. A 

 specimen of this species was sent to Michael to get his confir- 

 mation of the identification. He writes that my specimen 

 agrees with dasypus except that it has no hairs on the abdomen. 

 These hairs had evidently been broken off, as they are present 

 on the other specimens which I have. 



Genus Phthiracarus Perty. 



The characters are the same as for the genus Hoploderma 

 except that the genital and anal covers coalesce and the tarsal 

 claws are tridactyle. 



Two species: 



Cephalothorax hairless flagelliformis. 



Cephalothorax with six long hairs americanus. 



PUMraoariis flagelliformis, n. sp. (PI. XXXV., Fig. 13.) 



Dark olive-brown; integument thick but not brittle; surface 

 rough. 



Cephalothorax about a third as long as the abdomen, 

 hairless; pseudostigmata round and flat, with radiating furrows; 

 pseudostigmatic organ flagelliform and of moderate length; 

 labial organs and palpi prominent. 



Abdomen two thirds as broad as long, pointed at the pos- 

 terior end, and with a few fine hairs. Legs subequal, clothed 

 with many hairs. 



Length, 0.72 mm.; height, 0.40 mm. 



Under logs. Collected by myself at Homer, 111. A few 

 specimens. 



