Some New and Curious Acarina From Oregon 



H. E. EWING 



U]) to the present time few indeed of tlie many species of 

 Aoarina known to science have lieen 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 lias 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 {Alychidce), which 

 has hitherto been unknown in this country. 



Family BDELLID^ 



Genus Bdella Latreille 



Bdella magna n. sp. 



(Fig. 1) 



A large robust species; red throughout, Init 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 

 lialf 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 



