ee KNEES Aw C 
129 
being a Habronema larva. A larval Habronema has a closed 
anus with a very prominent anal operculum in the early stages, 
and only in the final larval stage is the anus open. It seems 
possible that the form may an aberrant larva of H 
microstoma, as is sometimes seen in Musca domestica. It is 
a possible that the larva does not belong to th 
f his theory that embryos of Habronema are capable of 
developing through their larval stages in the skin of the horse. 
If the form is a larval Habronema it is certainly aberrant, 
but there is no proof that it has developed from an embryo in 
Tn all other respects their larva resembles that usually found 
im “summer sores," and it is probable that they failed in 
proboscis along with larvae in the final stage, 
be p 
the later s. Therefore, the finding of larvae of an earlier 
Stage could not be taken as proof of development of the larvae 
ct is. 
i wed, further, that an open wound may develop into a. 
JPical "summer sore" if the animal is placed in an environ- 
ment where flies are heavily infested with larvae. | 
the 1 presumptive evidence in support of his conclusion that 
wh larvae in the wound escaped from the proboscis of the fly 
en the latter came to feed upon the raw surface. : 
. Larvae found by him in “summer sores" were 50 p in 
i er, and showed marked longitudinal striations in the 
| Men e, whereas those found in flies caught in a stable were 
x Fa nag diameter and showed no longitudinal striations. H 
