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THE PROPORTION OF THE SEXES IN CICINDELA VULGARIS, Say, AND OTHER NOTES ON THE SPECIES

Published online by Cambridge University Press:  31 May 2012

C. H. T. Townsend
C. H. T. Townsend
Affiliation:
Constanine, Mich.
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Extract

The proportion of the sexes in insects often throws much light upon the habits and appearance of the species. Having had good opportunity to make observations of this kind ttpon Cicindela vulgaris Say, in collecting a large number of the beetles, I have made out the appended table, which will explain itself. The dates I give, as they will show how the sexual proportion varies at different times of the season. From my observations it would seem that when the insects first appear in spring the females are much the more numerous; but that when they first appear in fall the males outnumber the females as two to one. I have taken this species here from 3rd March (1882) to 25th October (1884).

Type
Articles
Information
The Canadian Entomologist , Volume 16 , Issue 12 , December 1884 , pp. 227 - 231
Copyright
Copyright © Entomological Society of Canada 1884

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References

* Of 17 taken from their holes, all were females.

† Of all taken, both in holes and out, there were 45; 14 males and 31 females. In those that were out the two sexes were about equal in number. But all of the dozen or more taken in their holes were females.

‡ Were taken under rails on a sandy piece of plowed ground, the weather being cloudy and threatening rain.