JOURNAL OF ENTOMOLOGY AND ZOOLOGY 127 
the legs bear at the tips of their tarsi two stout claws and a 
small pulvillus. Pulvillus a little over one-half as long as the 
claws and pectinated on its lower margin. Total length of 
body, 0.70 mm.; width, 0.42 mm. 
From Corvallis, Oregon; in moss; by the writer. 
Described from three individuals. This species appears to 
be related to M. subnuda Berlese. It differs from Berlese’s 
species in having the body clothed with a different kind of 
sete, in having more slender legs, and in having a large median 
eye, as well as in some other characters. This is the first 
species of this genus and the first representative of the family 
Alychide to be described from this country. 
Hamily CANCULID Ah 
Genus Ceratoacarus n. gen. 
Palpi simple, tactile, non-raptorial, composed of four seg- 
ments; first segment very short; second, long; third, long; 
fourth, short and bearing several long tactile bristles. Cheli- 
cere very large, almost enormous, chelate, moving vertically. 
Hyes three; two of which are lateral and sessile, one is anterior 
and median. Posterior part of cephalo-thorax and all of the 
abdomen covered above with a single, thick, coriaceous shield, 
which shield bears the posterior eyes. Anterior part of cephalo- 
thorax covered with a similar, thick, coriaceous shield which is 
separated from the former mentioned one by an incomplete 
suture, and bears a pair of large horn-like tubercles on its 
anterior margin. All four pairs of coxe joined together, the 
coxe of each pair meeting at the median line. No sternum. 
Ventral surface of abdomen covered by a single, thick, coria- 
ceous plate which in the case of the female has a large aperture 
for the genital and anal openings. [Hach of the latter is closed 
by a pair of folding chitinous doors, or covers. In the male the 
genital and anal openings are separate, but are closed by 
chitinous folding covers as in the female. 
Type species: C. pacificus n. sp. 
