Mites Injurious to Domestic Animals. 75 



This mite lives inside the quills of the feathers of the fowl, and is 

 often present in great numbers. It is said to feed on the internal 

 cones of the feathers. It occurs both in Europe and North America. 



Symujoj)kilus columbae, Hirst, 1920. 

 (Figs. 41 band 4:2 b.) 



Closely allied to the preceding, but there are only two quite 

 short hairs on the front end of the anterior scutum, and the modified 



Fig. 63. 



Dermanyssus sanguineus (p. 87), x .39. (a) Ventral aspect, (b) Dorsal 

 aspect. (After Hirst, Bull. Ent. Res. 1914.) 



hair on each side of the claws of the feet is much wider, being scale- 

 like. A smaller species than S. hipectiiiatus. 



S. cohmbae lives inside the quills of the feathers of the domestic 

 pigeon. 



Genus Cheletoides, Oudemans, 1904. 

 Differing from Cheyletus in the absence of the comb from the 

 chelicerae (mandibles). 



