JOURNAL OF ENTOMOLOGY AND ZOOLOGY 125 
From Corvallis, Oregon; under old pieces of wood lying on 
moist ground; by the writer. 
Described 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 genus by the length of 
the fourth palpal segment. 
Family ALYCHIDA 
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 chelicere 
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 sete, 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 demareated from abdomen. Dorsal ridge 
prominent, and bearing at its anterior end the large median 
eye, and somewhat behind the middle a pair of long tactile 
sete, each of which arises from a funnel-shaped pore. These 
sete 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 
pseudostigmatice organ in the Oribatide. 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 with some small sete, some of which are simple, some 
are bifureate, and a few trifurcate. Legs subequal; anterior 
pair extending beyond the tips of the palpi by about one-half 
