41 
such spread, sufficient time and easy lodgment not being 
given for the development of the infestive stage; this, 
too, in spite of the comparatively short incubation time 
of the dog hookworm. 
Coccidium higeminum Stiles in the Swift Fox. 
Perhaps the most important parasitological finding 
this year consisted in the discovery of cysts of Coccidium 
higeminum Stiles in the feces of two specimens of Swift 
Fox. They were detected during a routine examination 
of canine feces for hookworm ova. Since one was 
drooping both were isolated. Both developed diarrhoea, 
and one died in a few days, showing severe ulcerative 
enteritis. On the basis of the material obtained at 
autopsy, together with additions from the literature, a 
communication will be made before the Pathological 
Society of Philadelphia in May. The parasite has been 
found three times in man and frequently in Paris dogs, 
but Stiles has not been able to find it in Washington 
dogs. This is the first time it has been reported in a 
wild animal. 
Spiroptera incerta Smith in parrots. 
Twenty-six parrots have died this year out of 199 
exhibited. This percentage (13) is lower than in previous 
years; viz., 23.7 in 1911, 36.3 in 1912, 17.2 in 1913, 
17.9 in 1914. During the year twenty-eight newiy 
arrived parrots have been examined, again with the dis- 
covery of no ova in the dejecta. Of the four birds men- 
tioned last year as survivors of the ones isolated early 
in 1912, three survive and show no ova in their droppings. 
One which died after an experimental injection during 
xanthoma research showed no worms in the proventricle. 
The probable explanation of this circumstance is given 
in last year's report. As no parrots have come to 
autopsy from the parrot house with these worms, we 
are inclined to consider the spiroptera enzootic closed. 
Investigation as to the nature of a tumor of a Red and 
Blue Macaw (mentioned in last year's report) continue. 
Results do not as yet justify statements of any value, 
although some promise is held forth by the experimental 
