121 
M than with those of the other two species. It has been 
suia experimentally that larvae of H. microstoma, although 
eing able to set up a typical reaction with necrosis, quickly 
AS a 
of the reasons for the failure so far to demonstrate the pres- 
Le of any larvae in the tissues. Also, as the presence in the 
of larvae of H. microstoma would apparently depend upon 
te. 
It seems possible also that “swamp cancer" may be due to 
y some other form of 
mu ges ; 
scid such as Musca vetustissima, which may be found 
A neral eosinophilia may or may not be demonstrable, but 
ko rud case the eosinophile leucocytes found in the lesion have 
very Ene there by the circulating blood. Lewis is not 
the nophile leucocytes in a tissue is not always indicative of 
7^ Rtenenoe of a verminous parasite. 
