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DIPTERA. 113 
Upon man, all accounts, except that of Dr. LeConte, represent them 
as Serious annoyances and some of them as fatal. Dr. LeConte says in 
the infested natives they seemed to produce but little uneasiness, and 
that the parties were not aware of the time when the eggs were depos- 
ited. Headmits that “they produce a swelling having the appearance 
of an ordinary boil, in which at times is felt for a few seconds an acute 
pain when the worm moves.” 
Apparently no one has as yet obtained the adult fly from larve infest- 
ing man, either by rearing them from larvee extracted or escaping from 
beneath the skin or by capturing them when depositing eggs. Lin- 
neus’s description refers to the larva. 
In many accounts there is no reference to a distinct sting at the time 
of egg deposition, this being determined by subsequent location and 
development of tumors; but Dr. LeConte, already cited, remarks espe- 
cially upon the victims not being aware when the eggs were laid, and 
this might give color to the existence of more than one species. 
Fia. 56.—a, Braner’s figure of entire Dermatobia larva, supposed to be closely allied to specimens 
shown in fig. 55; b, cephalic extremity; c, caudal extremity of same specimen; d, Dermatobia larva 
figured by Coquerel, and closely related to, if not identical with, preceding. only seen under lower 
power and perhaps in earlier period of development—enlarged (from Insect Life). 
It appears quite certain that in some cases at least the eggs are so 
fastened to the skin that the deposition is attended with pain. 
The larve evidently hatch very soon after and develop with consid- 
erable rapidity, but since in all recorded cases the larva has been 
extracted before maturity nothing is known of 1ts pupation. The form 
is quite peculiar and renders the accounts at least all referable to one 
genus of Cistride. 
We reproduce from Insect Life the figures presented in the paper by 
Dr. Matas. 
The usual remedy consists in the forcible expulsion of the larva, 
sometimes assisted by incisions, the application of tobacco ashes, ete. 
In a recent paper Blanchard! gives an extended account of the 
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1R. Blanchard, Sur les (strides américaines dont la larve vit dans la peau de 
Vhomme. Annales de la Société entomol. de France, Vol. LXI, p. 109, 1892, 
4653—No, 5 8 
