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A Contribution to the Knowledge of the Bot-flies, Gastrophilus intestinalis, DeG., G. haemorrhoidalis, L., and G. nasalis, L.*

Published online by Cambridge University Press:  10 July 2009

S. Hadwen  and
A. E. Cameron
S. Hadwen
Affiliation:
(Dominion Pathologist, Health of Animals Branch),
A. E. Cameron
Affiliation:
(Technical Assistant, Entomological Branch), Department of Agriculture, Ottawa, Canada.
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Extract

The eggs of the three species of bot-flies discussed in this paper are distinguished by the fact of that of G. haemorrhoidalis being the only one stalked. It is also longer than those of the other two species, which are of about equal length. Further, it is brownish black in colour, that of G. intestinalis being whitish yellow and G. nasalis yellow. The egg of G. intestinalis adheres to the hair by clasping flanges, which run only two-thirds of its length, whilst the flanges of the G. nasalis egg run almost the entire length.

The egg of G. haemorrhoidalis is not inserted nor screwed into the skin of the host. The eggs of G. intestinalis are laid indiscriminately on the body of the host, but preferably on the long hairs investing the inside of the foreleg. G. nasalis lays its eggs on the hairs of the intermaxillary space, and G. haemorrhoidalis on the hairs of the lips, preferably the lower.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 9 , Issue 2 , December 1918 , pp. 91 - 106
Copyright
Copyright © Cambridge University Press 1918

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References

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