jouenaij of entomology and zoology 125 



From Corvallis, Oregon; under old pieces of wood lying on 

 moist groinid; by the writer. 



Desoril)ed from three specimens. This species is distin- 

 guished from all other American species by its great size, and 

 from most of the other species of the genns by the length of 

 tlie fourth palpal segment. 



Family ALYCHID^ 

 Genus Michaelia Berlese 

 Michaelia pallida n. sp. 



(Fig. 2) 



Like the other members of its genus this species is pale or 

 white in color. Integument alveolate; thickly clothed with 

 minute scales, or spine-like tubercles. Stylets of chelicerae 

 needle-like, as long as the palpi, and bent near their base so as 

 to form a sharp angle. Palpi slightly longer than the femur 

 of leg I; distal segment slightly longer than the penultimate 

 one, clothed with a few moderate trifurcate setae, and bearing 

 at its distal end a simple, straight, stout spine, which is about 

 two-thirds as long as the segment from which it arises. 

 Cephalo-thorax not demarcated from abdomen. Dorsal ridge 

 prominent, and bearing at its anterior end the large median 

 ej-e, and somewhat behind the middle a pair of long tactile 

 seta?, each of which arises from a funnel-shaped pore. These 

 setfe are slender, simple, and are equal to the dorsal ridge itself 

 in length. From each side of the dorsal ridge at its posterior 

 end there arises a specialized seta, or organ, similar to the 

 pseudostigmatic organ in the Oribatidse. Each of these organs 

 consists of a slender stalk, or pedicel, and a subglobose head. 

 The length of the pedicel is just equal to the long diameter of 

 the head. Abdomen, which is not demarcated from cephalo- 

 thorax, is about two-thirds as broad as long, and is incised on 

 the posterior margin at the median line. It is very sparsely 

 clothed ^ath some small setae, some of which are simple, some 

 are bifurcate, and a few trifurcate. Legs subequal; anterior 

 pair extending beyond the tips of the palpi by about one-half 



