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( = Olfersia ) maura. These flies infest pigeon houses. 
The incubation period in the pigeon may be as long as 
thirty-eight days. The cycle in the fly has not yet been 
traced. It remains to be seen also whether Hippo- 
boscids transmit halteridia of other birds. 
Post-mortem .—Pigment is found in the kidney, 
intestine, bone marrow, liver, and especially the 
spleen. The brain, on the contrary, is almost entirely 
free from it. 
It is probable that the halteridia of all birds are 
not of the same species. Inoculation from one bird 
to another is extremely difficult, if not impossible. 
This may be due to the fact that the parasites in the * 
blood are all sexual forms. 
7. H. smithi. —In smears from the liver of the 
turkey ( Meleagris gallofavo dome Stic a). The parasite 
