64 Mites Injurious to Domestic Animals. 



male divided into two segments by a transverse line (see fig. 22 b) 

 is found on the feathers of the turkey, peacock (var. ginglymura), 

 and fowl, whilst another {M. columhae, Buchholz, figs. 20 and 21) 

 occurs on the domestic pigeon, fowl, canary, and certain other 

 birds ; a third (M. velata, Megnin, fig. 22 a) is found on ducks. 



Pterolichus obtusus, Eobin (figs. 23 and 24) is a feather mite 

 occurring on several kinds of birds, especially on the red-legged or 

 French partridge {Perdrix rubra), and is sometimes found on fowls. 



4_J^ -\ 





Fio. 51. 



Demodex hovis (p. 8.3). — Ventral view of female, X 335, and dorsal and 

 lateral views of male, X 324. 



The specimens of this mite figured in this pamphlet were taken on 

 chickens in the United States. Another member of the genus 

 {Pterolichus bicaudatus, Gervais, figs. 25 a and 26 a) occurs on 

 ostriches in South Africa and also in California, whilst an aUied 

 species (P. sculpturatus, Hirst, figs. 25 b and 26 b) lives on and inside 

 the feathers of the South African ostrich in the Transvaal. Another 

 feather mite {Freyana chmiayi, Trouessart) is met with on turkeys 

 (fig. 30). Two species of Dermoglyphus {D. minor, TSTorner, and D. elon- 

 gatus, Megnin) live inside the quills of the feathers of fowls, the latter 



