Notes on Acari parasitic on Birds. 121 



XIV. — Notes on Acari parasitic on Birds, with Descriptions 

 of Two new Species. By Stanley Hirst. 



(Published by permission of the Trustees of the British Museum.) 



Syringophilus cohimbce, sp. n. 



? ?. Body elongated and very narrow. Only two hairs 

 a>e present at anterior end of scutum, and they are much 

 shorter than in the female or nymphs of S. bipectinatus. 

 The other hairs of the dorsum, especially those on the hinder 

 end of the scutum, are longer than in S. bipectinatus. 

 Straight cellular portion of trachea short, consisting of only 

 four cells. Claws of legs slender ; the comb consists of 

 fewer setse than in S. bipectinatus, and the modified hair on 

 the tarsus on each side of the claws is much wider, being 

 scale-like and striated. 



Host. Domestic pigeon ; inside quill of feathers. Dalla=, 

 Texas (Babcock & Wood). Specimens examined through 

 the kindness of Mr. F. 0. Bishopp, of the United States 

 Department of Agriculture. 



Pterolichus scidpturatus, sp. n. 



J" . Very similar to P. bicaudatus, but the posterior lobes of 

 the abdomen are not so rounded in outline. Posterior plate 

 of dorsum ornamented with minute rosettes or stars (appa- 

 rently sometimes raised on very slight granules), whereas 

 in P. bicaudatus the punctations are uniformly distributed and 

 do not form rosettes. 



Length (including capitulum) 540 fjb. 



Nymph (second stage). Posterior plate of dorsum very 

 unlike that of P. bicaudatus, being almost oblong in shape, 

 except for the posterior margin, which is notched or indented 

 in the middle. Lateral margins practically straight and 

 parallel with one another ; the anterior margin is also practi- 

 cally straight. Surface of this plate sculptured with numerous 

 minute rosettes. Posterior end of abdomen with two pairs of 

 long hairs, as in P. bicaudatus. 



Length (including capitulum) 560 //.. 



Host. South African ostrich, Transvaal ; a number of 

 examples inside quills of that bird : Ondersfepoort (2-4. 4. 19) ; 



