Volume V 
No. 3 
FANNIA^ {HOMALOMYIA) CANICULARIS LINN. 
AND F. SCALARIS FAB. 
AN ACCOUNT OF THE BIONOMICS AND THE LARVAE OF THE 
FLIES AND THEIR RELATION TO MYIASIS OF THE INTESTINAL 
AND URINARY TRACTS. 
By C. GORDON HEWITT, D.Sc., 
Dominion Entomologist, Ottaiua, Canada. 
(With Plate VII, and 7 Text-figures.) 
The two flies Fannia caniadaris Linn, and F. scalaris Fab. are, on 
account of their habits, of considerable economic importance in their 
relation to man. It is therefore desirable that those engaged in public 
health and medical work and others should have a knowledge of the 
breeding and other habits of these flies, which they are certain to meet 
in their work under circumstances of varying importance. The inquiry 
of which this account is the result was undertaken several years ago at 
the request of Dr Monckton Copeman in connection with the Local 
Government Board’s inquiry on the carriage of infection by flies in 
the reports of which a portion of tliis paper has been included. Owing 
to my removal from England to Canada in 1909 and subsequent pressure 
of work, its completion was delayed. 
These two species of flies belong to the dipterous family Anthomyidae, 
many of which resemble the house-fly {Musca domestica) in appearance. 
They are characterised chiefly by the close approximation of the eyes of 
the male, the comparatively large squamae, or lobes, on the posterior 
sides of the bases of the wings, and the open first posterior, or apical, 
cell (5R) of the wing. Most of the larvae, or maggots, feed upon 
decaying vegetable or animal substances. 
^ By the rules of priority the generic name Fannia of Eobineau Desvoidy 1830, which 
he gave in his Essai sur les Myodaires, will have to replace Bouche’s genus Homalomyia 
to which genus these species are usually referred but which was not created until 1834. 
Parasitology v 
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