On Acari from, the Lungs of Macacus rhesus. 167 



passed through my hands. For this Mite he proposes to establish, 

 the name Pneumonyssus foxi.^ Of the specimens described by the 

 previously cited authors, the Pneumonyssios griffithi of Newstead 

 most closely resembles the species under consideration ; but it does 

 not coincide in all details, nor do the rather sketchy outline 

 drawings illustrating his paper. 



Mites belonging to the Gytoditinse are, according to Neumann 

 (7), found in the subcutaneous or inter-muscular connective tissue 

 surrounding the respiratory organs, or in the air-sacs of birds. The 

 Oytodites inhabit the air-sacs of the Gallinacea, especially Fowls 

 and Pheasants. They enter the bronchi, and even reach the air- 

 canal in the bones. They often exist in large numbers in the 

 air-sacs without betraying their presence during the life of their 

 host, and apparently causing no serious inconvenience or ill-health, 

 though occasionally they have been known to be so numerous as 

 to crowd the bi-onchi, and cause by their irritation of the mucous 

 membrane fits of coughing. The evidence, however, appears to be 

 quite inadequate to permit acceptance of the statements of various 

 German authors that these Mites are the frequent cause of enteritis, 

 peritonitis, etc., in Fowls. Symjplectoptes cysticola belonging to the 

 second genus of Sarcoptid Cysticoles is also peculiar to the 

 Gallinacea living in the connective tissue, but does not appear to 

 affect the health of the birds. The cysts containing these Mites 

 are yellow oval bodies about 1 mm. long, sometimes very 

 numerous, and their contents are soft, granular, and adipose or 

 calcareous — much like those of tubercle ; and are to be found on 

 the abdominal viscera, in the peritoneum, in the muscles, and 

 beneath the skin. Biologically and pathologically, the account 

 given by Neumann of these Acarids peculiar to the Gallinacea is 

 of great interest as showing their relatively similar results in the 

 host to those of the Acari infecting the lungs of Mammals. 



I would express my thanks to Mr. Chas. D. Soar for looking 

 over my notes and specimens. 



Bibliography. 



1. Allman. — Description of a New Genus and Species of Tracheary 



Arachnidans. Ann. & Mag. Nat. Hist., xx. 47 (1847). 



2. Banks, N.— A Treatise on the Acarina or Mites. Proc. U.S. Nat. Mus., 



xxviii. 1-114 (1904). 



3. Newstead, K., & Todd, J. I. — On a New Dermanyssid Acarid, Pneu- 



monyssus duttoni sp. n. Liverpool School Trop. Med. Mem., xviii. 

 41. 



* After Dr. Herbert Fox, who Weidman states performed the autopsy on the 

 Monkey, recognized the parasitic nature of the lesions and submitted all the 

 material to him. 



