Some blood parasites 
(Hæmoproteus and Hæmogregarina) 
By S. T. DARLING. 
I. — Haemoproteus danilewski in the Turkey Buzzard. 
This parasite was formel in several specimens of the redheaded 
turkey buzzard, Cathartes aura, while several specimens of Ca- 
tharista atratus, which is much more commonly seen here, were 
examinée! for it in vain. 
Most of the forms seen were full size gamétocytes. Very few 
younger forms were detected and these were one-fourth and one- 
half grown. No segmenting forms were seen. 
The female gamétocytes stain deeply and the melanin is black 
and scattered. The cytoplasm stains a deep blue and contains 
small globular acromatic bodies. The chromatin of the nucléus, 
when stained by Giemsa’s stain, appears as one round mass 
about 2 microns in diameter. 
The male gamétocytes stain feebly, the chromatin of its nucléus 
is very slightly visible, and its pigment bas a tendency to be col- 
lected discretely in each pôle. 
The nucléus of the invadecl red blood cell is very slightly dis- 
located, does not appear to be dehaemoglobinized but stains like 
a non-infected red cell. 
When counted it was seen that there were twice as many fe¬ 
male as male gamétocytes. 
This bird is infestecl with the following parasites: 
A Hippoboscid fly Olfersia (?) 
Colpocephalum kelloggi, Osborn. 
Menopon alternatum, Osborn. 
Pterolichus delibator, Rob. 
Amblyoma sp. 
The Sergents (i) hâve shown that for the pigeon a Hippobos¬ 
cid fly Lynchia maura Bigot, 1885, is also a host. 
I dissected several specimens of the Hippoboscid fly from tur¬ 
key blizzards without detecting any évidences of Haemoproteus, 
(1) Sergent Ed. et Etien., C. R. Soc. Biologie, 24 nov. 1906. 
