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THE LARVAL DEVELOPMENT OF THREE BARKBEETLES1

Published online by Cambridge University Press:  31 May 2012

M. L. Prebble
M. L. Prebble
Affiliation:
Dominion Entomological Labratory, Fredericton, N. B.
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Extract

The application of Dyar's Law to lepidopterous larvae has been discussed by numerous investigators, who have shown that in many species the head-widths follow a regular geometrical progression in successive instars. Taylor reviews Dyar's Law thoroughly and tests it out on the sawfly, Phyllotoma nemorata (Fallen). The same author examines Dyar's measurements on 46 species of sawfly larvae and concludes that Dyar's Law holds as well for the sawfly larvae as for the 28 species of lepidopterous larvae on which the rule was originally based.

Type
Articles
Information
The Canadian Entomologist , Volume 65 , Issue 7 , July 1933 , pp. 145 - 150
Copyright
Copyright © Entomological Society of Canada 1933

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References

2 R. L. Taylor (1931). On “Dyar's Rule” and its application to Sawfly Larvae. Ann. Ent. Soc. Amer. XXIV, (3), 451–466.

3 M. E. Metcalfe (1932). On a suggested method for determining the number of larval instars in Sitodrepa panicea L. Ann. Appl. Biol., XIX, No. 3; 413–419.

4 M. W. Blackman (1915). Observations on the life history and habits of Pityogenes hopkinsi Swaine. N. Y. State College Forestry, Syracuse, Vol. XVI, No. 1, part II; 11–66.

5 See Can. Ent., LXI, No. 7; 145.