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, 7/, 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 temnerature not 
too low. 
Animal Intested.—The cuticuiar surface of the 
horse. 
Condition 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- 
