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Analysis of Frequency Distribution of Adults and Larvae of Choristoneura fumiferana (Clem.) and C. pinus Free. (Lepidoptera: Tortricidae)1

Published online by Cambridge University Press:  31 May 2012

Constance E. Cox
Constance E. Cox
Affiliation:
Statistical Research and Service Unit, Science Service, Ottawa, Canada
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A rapid means of identifying species of insects on the basis of physical measurements is useful to the field worker. The efficiency of the postclypeal index in separating the larvae of two closely allied species is illustrated herein. Occasionally species fall into overlapping subgroups, making it difficult to determine the characteristics of a given subgroup. A method useful in identifying such subgroups is outlined herein.

Type
Articles
Information
The Canadian Entomologist , Volume 85 , Issue 4 , April 1953 , pp. 136 - 141
Copyright
Copyright © Entomological Society of Canada 1953

References

Freeman, T. N. 1953. The spruce budworm, Choristoneura fumiferana (Clem.), and an allied new species on pine (Lepjdoptera: Tortricidae). Can. Ent. 75: 121.CrossRefGoogle Scholar
Harding, J. P. 1949. The use of probability paper for the graphical analysis of polymodal frequency distributions. J. Mar. Biol. Assoc. United Kingdom 28; 141–153.CrossRefGoogle Scholar
Hoel, P. G. 1947. An introduction to mathematical statistics. John Wiley and Sons Inc., New York.Google Scholar