Sarcoptijormes 373 



C. ovis (Railliet) on sheep, and C. cuniculi (Zurn) on rabbit. 



Mites belonging to the genus Otodectes Uve in the ears of dogs, 

 cats, ferrets, and fox. As with the above species they are structurally 

 similar but are considered as varieties of Otodectes cynotis Hering. 

 The mites cause a canker in the ears of cats in England and the pres- 

 ence of the mites in dogs' ears causes the animal to shake its head 

 constantly. 



References: 



Good, E. S. 1909. Sheep scab. Kentucky Agr. Expt. Sta. Bull. 1437, 219- 



246. 

 Grandjean, F. 1937. Otodectes cynotis (Hering) et les pretendues tra- 



chees des acaridiae. Bull. Soc. Zool. France (4) : 280-290. 

 Hirst, S. 1922. Mites injurious to domestic animals. Brit. Mus. (Nat. 



Hist.) Econ. Ser., No. 13. 

 Imes, M. 1918. Cattle scab and methods of control and eradication. 



U.S. Dept. Agr. Farmers' Bull. 1017, pp. 1-29 (revised 1935). 

 . 1924. Sheep scab. U.S. Dept. Agr. Farmers' Bull. 7-13 (revised 



1935). 

 Marine, D. 1924. The cure and prevention of ear canker in rabbits. Sci- 

 ence 60(1546) : 158. 

 Van Es, L. 1904. Scabies in sheep and cattle and mange in horses. N. Dak. 



Agr. Col. Expt. Sta. Bull. 61:399-435. 



Epidermoptidae Trouessart, 1892 



(= Mealiidae Oudemans, 1923) 

 Figures 303, 304 



Diagnosis: Very small mites measuring from 0.17 mm. to 0.39 mm. 

 in length, the epidermoptids are rather flat, usually very short, and ap- 

 proximately circular. A shield is present but is found only on the propo- 

 dosoma in the females. There are no vertical setae on the propodosoma. 

 The skin is soft and striated. The posterior of the male is often notched 

 or bilobate while that of the female is rounded. The male possesses 

 copulatory suckers. All tarsi end in caruncles. 



Genera: 



1. Epidermoptes Rivolta, 1876 



Type. Epidermoptes bilobatiis Rivolta, 1876 



2. Dermation Trouessart and Neumann, 1887 



Type. Epidermoptes bihamatiis Trouessart and Neumann, 1887 



