134 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



Myobia caudata, new species. 



Body about twice as long as broad, broadest behind coxae IV, plainly 

 constricted behind coxa I and behind coxa II, abdomen behind hind 

 legs broadly rounded. Dorsum with a sub-median row of long, slender 

 bristles, at tip of abdomen a pair of very long bristles arising from 

 small tubercles, in fact longer than the entire body. Legs short and 

 stout, tapering to the tip, each with various short hairs and a few 

 larger bristles, usually near the tip; first pair modified as usual, the 

 claw at tip is rather more curved than in M. musculi; claws at tips of 

 other tarsi are rather shorter and more curved than in M. musculi. 



Length, 0.2 mm. 



Guelph, Ontario, Canada, on little brown bat. 



Differs from M. musculi in more elongate form, slender 

 dorsal bristles, longer bristles near tips of legs, shorter claws, 

 etc. 



Family TETRANYCHID^. 

 Tetranychopsis spinosa, new species. 



Body about one and one-fourth times as long as broad, in general 

 sub-globular ; the furrow separating the cephalothorax and abdomen is 

 distinct, and on the dorsum of abdomen are two other transverse fur- 

 rows. Cephalothorax with three spines each side, two of them short 

 and sub-clavate are situated on the margin, the other is twice as long 

 and acuminate. Abdomen with a sub-median row of three long spines 

 each side arising from tubercles, and on margin of abdomen each side 

 are six spines, four long and slender, and usually curved, two others, 

 one behind the long humeral spine, and the other the last of the series, 

 are short and sub-clavate. The legs are long and slender, femur I 

 about one-half the length of body; the basal joints with short thick, 

 mostly blunt-pointed, spines, other joints with slender bristles. 



Length, 0.4 mm. 



Guelph, Ontario, Canada, on leaves of basswood. 



Family GAMASID^. 

 Liponyssus canadensis, new species. 



Pale yellowish. Body elongate ; in the female about one and a half 

 times longer than broad, in male nearly twice as long as broad; the 

 dorsal shield nearly covering the entire dorsum, legs of about moderate 

 length ; hind legs reaching a little beyond tip of body, both body and 

 legs with many short stout bristles, some each side near tip of body are 

 longer; second pair of legs plainly thicker than other pairs. The 

 peritreme long and slender, very sinuous, nearly reaching to base of 

 coxa I. 



Length, 0.6 to 0.7 mm. 



