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The Instars of a Maggot (Pegohylemyia) Inhabiting White Spruce Cones1

Published online by Cambridge University Press:  31 May 2012

Extract

Maggots of Pegohylemyia sp. have been found inhabiting the cones of white spruce, Picea glauca (Moench.) Voss, in southern Ontario. The species was identified from a single male specimen as probably Pegohylemyia anthracina Czerny by the Swedish authority Dr. O. Ringdahl. Difficulty in rearing the maggots to the adult stage has delayed confirmation of this identification but it is expected that a good series of adults will be available shortly. In this paper, however, the emphasis is placed on the instars with an outline of the life cycle. It is shown that the second- and third-instar larvae are free-living, but the first-instar larvae moult to the second within the egg chorion.

Type
Articles
Copyright
Copyright © Entomological Society of Canada 1954

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References

(1)Brooks, A. R., 1951. Identification of the root maggots (Diptera: Anthomyidae) attacking cruciferous garden crops in Canada, with notes on biology and control. Can. Ent. 83: 109120.CrossRefGoogle Scholar
(2)Eltringham, H., 1930. Histological and Illustrative Methods for Entomologists. Oxford Univ. Press.Google Scholar
(3)Thomson, R. C. Muirhead, 1937. Observations on the biology and larve of the Anthomyidae. Parasitology 29: 273358.CrossRefGoogle Scholar