56 PARASITOLOGY. 



solution boiling hot to the kerosene, and stir with an 

 egg beater. When ready to use, take one part of the 

 emulsion and add to it nine parts of water. 



The lime and sulphur dip used warm and scrubbed 

 thoroughly under the scales is very effective. The 

 lime and sulphur dip is made as follows : 



Unslaked lime, V3 pound ; sulphur, 1 pound ; water, 

 4 gallons. This mixture should be boiled for two 

 hours. The lime acts as a solvent for the sulphur. 



Other antiseptics which are parasiticides may be 

 used. Isolate diseased birds and avoid reinfestation 

 by the introduction of new birds to the flock. 



PSOROPTES Communis ; variety Equi (Equus — horse). 



Synonyms- — Long-nosed Psoropt; Psoroptes Long- 

 irostris. 



Description. — About the same size as the Sarcoptes. 

 Its rostrum is more than twice as long as wide. 



Vitality. — It will live for thirty days off of the 

 host, if in a moist atmosphere, and temperature not 

 too low. 



Animal Infested. — The cuticular surface of the 

 horse. 



Conditioii Produced. — It produces scabies in the 

 same manner as the Sarcoptes, the parasites living 

 in colonies under the scab. The scab parasites usu- 

 ally implant themselves on the animals where the 

 hair is long, as the mane, back and rump. Its spread 

 is slow, though it may later spread over the body. 

 The maxillary space, and where the hair is thinnest, 

 as the groin, and the axillary region, are favorite 

 locations in later stages. The biting and rubbing, 

 a result of the intense irritation produced by the par- 



