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A Two-Year Life-Cycle in Grasshoppers (Orthoptera: Acrididae) Overwintering as Eggs and Nymphs1

Published online by Cambridge University Press:  31 May 2012

R. Pickford
R. Pickford
Affiliation:
Field Crop Insect Laboratory, Saskatoon, Sask.
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Extract

Most grasshoppers of the prairie region of Western Canada hatch in the spring and complete their life-cycles in one year. There are a few species, however, that hatch in the fall and overwinter as partly grown nymphs; these include the oedipodines Arphia conspersa Scudd., Pardalophora apiculata (Harr.), Xanthippus corallipes latefasciatus Scudd., and Cbortophaga viridifasciata (Deg.) and the acridine Psoloessa delicatula delicatula (Scudd.). Criddle (1933) suggested this when he stated that, although the eggs of some Oedipodinae that hibernate as nymphs normally hatch within a month or two after oviposition, they occasionally fail to do so, in which case a further period of 12 months may occur before hatching takes place. The life-historia of all thest except C. viridifasciata were studied.

Type
Articles
Information
The Canadian Entomologist , Volume 85 , Issue 1 , January 1953 , pp. 9 - 14
Copyright
Copyright © Entomological Society of Canada 1953

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References

Criddle, N. C. 1933. Studies in the biology of North American Acrididae. Development and habits. Proc. World's Grain Exhib. and Conf., Canada, 2: 474–494.Google Scholar
Salt, R. W. 1949. A key to the embryological development of Melanoplus bivittatus (Say), M. mexicanus mexicanus (Sauss.), and M. packardii Scudd. Canadian J. Res., D, 27: 233–235.CrossRefGoogle Scholar
Slifer, E. H. 1945. Removing the shell from living grasshopper eggs. Science 102: 282.CrossRefGoogle ScholarPubMed