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THE NUMBER OF LARVAL STAGES OF THYMELICUS LINEOLA (LEPIDOPTERA: HESPERIIDAE) IN EASTERN CANADA1

Published online by Cambridge University Press:  31 May 2012

Jeremy N. McNeil
Jeremy N. McNeil
Affiliation:
Département de biologie, Université Laval, Québec, Québec G1K 7P4
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Abstract

Using Dyar’s Law the number of larval stages in the life cycle of the European skipper, Thymelicus lineola, was determined in Quebec (1974, 1975, 1976), Ontario (1976), and Prince Edward Island (1976). In all regions five larval stages were observed, as in Europe, and not six as previously reported in Ontario. Apparently in this latter case an erroneous interpretation of the significant differences existing between the sexes (relating to head capsule width and developmental time) resulted in male and female fifth stage larvae being considered as fifth and sixth stages respectively.

Résumé

Utilisant la loi de Dyar nous avons déterminé le nombre de stades larvaires chez l’hespérie des graminées, Thymelicus lineola au Québec (1974, 1975, 1976), en Ontario (1976) et sur l’île du Prince-Édouard (1976). Dans toutes les régions on compte cinq stades larvaires, comme en Europe, et non pas six comme déjà mentionné pour l’Ontario. Il semblerait que les différences significatives entre les sexes (concernant la largeur de la capsule céphalique et le temps de développement) ont été mal interprétées : en effet, le mâle et la femelle du cinquième stade larvaire ont été considérés respectivement comme cinquième et sixième stade.

Type
Articles
Information
The Canadian Entomologist , Volume 110 , Issue 12 , December 1978 , pp. 1293 - 1295
Copyright
Copyright © Entomological Society of Canada 1978

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