52 



CLINICAL DIAGNOSTICS. 



II. Skin Diseases Due to Animal Parasites. 



The common skin parasites are: 



1. Lice or Pediculidae (Haematopinus asini, eurysternus, 

 urius, etc.) 



2. Bird lice or Mallophaga (Trichodectes equi, scalaria, etc.)* 



3. Lotse flies or Hippoboscidae (Hippobosca equina, Meloph- 

 agus ovis). 



4. Ticks or Ixodidae (Boophilus bovis) Texas cattle tick. 



5. Fleas or Siphonaptera (Ceratopsyllus serraticeps of dog, 

 Pulex irritans of man). 



6. Bird ticks or Gamasidae (Dermanyssus avium, D. gallinae). 



7. Mites or Acarina (Chorioptes, symbiotes, horse, ox, goat,, 

 etc.). (Psoroptes communis, horse, ox, sheep, etc.). (Sarcoptes 

 equi, canis, suis, cati, etc.). (Sarcoptes mutans of fowl). (Acarus 

 folliculorum or Demodex folliculorum, var. canis, suis, etc.). 



[*The common hen louse. Menopon pallidum, is remotely related to the trichodectes, 

 and resembles them in general appearance. It is said to pass readily to other species of 

 birds, and to trouble horses kept near lousy henroosts.] 



