OF WASHINGTON, VOLUME XI, 1909 133 



NEW CANADIAN MITES. 



[Arachnoidea, Acarina.] 

 BY NATHAN BANKS. 



In the following pages I have brought together the descrip- 

 tions of some new mites from Canada which form part of a 

 considerable collection of Acarina. sent me for identification by 

 Professor Tennyson D. Jarvis, of the Ontario Agricultural 

 College at Guelph, Canada. Several of them represent genera 

 hitherto unrecorded from our country. 



Of particular interest are some species of Ltrlaps, three of 

 which are described from the muskrat, groundhog, and chip- 

 munk, all similar to the L. echidintts which has recently been 

 taken from rats in California. 



Family CHEYLETID^E. 

 Cheyletus longipes, new species. 



Pale yellowish. Body about one and one-half longer than broad; with 

 bristles bearing fine, short hairs. Head sub-triangular, with two bristles 

 each side, the anterior one much shorter than the other; on anterior 

 part of the cephalothorax each side are three bristles close together; 

 one on each shoulder, and behind this a sub-lateral row of seven bristles, 

 the last one close to tip. Legs long and slender, the first pair much 

 longer than the others, in fact nearly twice as long as the body, with 

 long bristles as figured, and three at the tip; other legs with a few long 

 bristles near middle of the length, but only very short ones near tip of 

 tarsi. Palpi not very greatly thickened near base, the second joint 

 hearing two bristles above, and one on the outer side below; third joint 

 with two simple bristles, and the claws and comb as figured. 



Length, 0.5 mm. 



Guelph, Ontario, Canada ; on gelatin culture in bacteriologi- 

 cal laboratory. 



Cheyletiella canadensis, new species. 



Dorsum with two broad shields ; the anterior one extending back to 

 coxa? Ill, and bearing above on each side two bristles, one bristle each 

 side between the shields, and one each side on the anterior margin of 

 the posterior shield ; tip of abdomen with a long bristle near each outer 

 corner, a smaller one each side near middle, and a long bristle on each 

 shoulder; claw of palpus not very stout, and with a tooth near its inner 

 base, Ind an inner lobe. 



Length, 0.18 mm. 



Guelph, Ontario, Canada, on bluebird. 



