Some New and Curious Acarina From Oregon 
H. E. EWING 
Up to the present time few indeed of the many species of 
Acarina known to science have been recorded from Oregon, and 
for that matter only a very few from California where the 
arthropod fauna has been well studied. A little over a year 
ago the writer began a survey of the mite fauna of the Pacific 
Slope, and in this article he has to report a few new species 
which are of unusual interest either because of their great 
size, or the significant or peculiar characters which they show. 
In the following pages six new species are described. Three 
of these are made the types of new genera; one of the species, 
Michaelia pallida n. sp., belongs to a family (Alychide), which 
has hitherto been unknown in this country. 
Family BDELLIDA 
Genus Bdella Latreille 
Bdella magna n. sp. 
(Fig. 1) 
A large robust species; red throughout, but body darker than 
appendages. Integument not tessellated. Palpi large, total 
length over one and a half times that of the beak; second 
segment more than two-thirds as long as the beak; third 
segment slightly over one-half as long as the fourth; fourth 
segment about one-half as long as distal segment; distal seg- 
ment of practically equal width throughout, about one and a 
half times as long as segments three and four combined, and 
bearing about a dozen prominent, straight, simple bristles 
besides the distal tactile ones. Inner tactile bristle of palpus 
about three-fourths as long as the outer one; outer tactile bristle 
about two-thirds as long as the distal segment. Beak stout, 
with several prominent curved, simple bristles, including a 
large pair situated dorsally slightly in front of the middle. 
Shoulder bristles rather moderate, about as long as the tibia 
