IS6 INSECTS OF ECONOMIC IMPORTANCE 



Control — The disease is contagious and the af- 

 fected fowl should be isolated; dust the fowl with 

 fresh Buhach; use the caraway oil, i part, and 

 white vaseline 5 parts; Theobald rubs oil of cloves 

 over the affected area. 



Pulmonary mite ^ (Cytodites niidus) 

 Order — Acarina 



These mites inhabit the bronchial tubes even 

 reaching the cavities in the pneumatic bones; the 

 mite is readily seen with the eye; it is only when 

 they are abundant that they cause trouble; they 

 sometimes occur in such numbers that they close 

 up the tubes an.d produce asphyxia; this mite is of 

 considerable size and readily seen with the naked 

 eye ; it is white and globular in form. 



Hen flea ^ (Ceratophylhis gallincu) 

 Order — Siphonaptera 



This hen flea is evidently not abundant in Amer- 

 ica having been found here but twice so far ; it has 

 sucking mouthparts and lives upon the blood of 

 its host ; fleas are not permanent parasites ; they get 

 on the hens to feed and when through leave them. 



The female lays her white eggs in the nests 

 chiefly, but sometimes on the floor among the drop- 

 pings ; the eggs hatch into long slender white worm- 

 like larvae that live on the organic matter found 

 among the cracks and crevices of the house; in 

 about two weeks they make a silken cocoon and 

 change to the pupa ; in two to three weeks the adults 

 appear. 



Control — Same methods as advised for the con- 

 trol of the mites and lice. 



4, ^ Pearl, Surface, and Curtis — Poultry Diseases and Treatment, 

 Me. Expt. Stat., 191 1. 

 ^ Theobald — Parasitic Diseases of Poultry. 



