OF WASHINGTON, VOLUME XI, 1909. 135 



Guelph, Ontario, Canada, on English sparrow, red-eyed 



vireo, meadow lark, and king bird. It differs from the other 

 species of the genus in larger shield, more sinuous peritreme, 

 more spine-like hairs, etc. From Dermnnyssus hirundinus and 

 D. passcrinns it differs, aside from the generic characters, in 

 the much longer peritreme. 



Sejus macropilis, new species. 



Pale yellowish. Body about one and one-half times longer than broad, 

 rather truncate behind. Above with four very large heavy curved 

 spines each side, situate near the margin, the last two close together, 

 the anterior one is the largest ; they are minutely spinulate or bristly. 

 At tip of body is a pair of curved stout hairs, more slender than the 

 spines, near each anterior spine is a short stout spine. Legs long and 

 slender, with some short, fine hairs, IV pair with extremely long tarsi ; 

 the tibia IV with a very long stout spine similar to those on the body, 

 and a short erect spine near tip of the preceding joint. 



Length, 0.3 mm. 



From Guelph, Ontario, Canada, attacking Eriophyes on large- 

 toothed aspen, July 27. 



Celaenopsis pedalis, ne\v species. 



Female Pale yellowish. Body about twice as long as broad, tapering 

 each way, but mostly toward posterior end; dorsum with many long, 

 stout bristles, perhaps most numerous on the sides and behind ; venter 

 also with long bristles ; one at each anterior corner of the sternal plate, 

 two pairs near middle of this plate, and a small one at each posterior 

 corner; three or four each side near bases of the coxae, two pairs each 

 side on ventral plate, two each side near anus, and several others on 

 outer region of venter and along the margin. Legs slender and long; 

 I fully as long as body, IV next, II rather stouter than the others, all 

 very bristly, especially near tips. The female genital aperture is longer 

 than broad, broadest in front, and its anterior margin bi-convex ; tin 

 mandibles show an apophysis from the side of the outer finger. 



Length, 0.8 mm. 



Guelph, Ontario. Canada ; taken from the larva of Pelidnota 

 punctata, April 1. 



Celaenopsis latus, new species. 



Color yellowish-brown, legs rather paler. Body broad, about one 

 and one-half times as long as broad, broadest in middle, and broadly 

 rounded behind, dorsum smooth, margin with some bristles, two of 

 these on each posterior side are very long. Legs short, leg I very 

 slender, II a little thicker than any of the others, all with hairs, and 

 some very short spines. Sternum with a very stout curved spine or 



