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NOTES ON THE BIOLOGY OF LASIOGLOSSUM (EVYLAEVS) COOLEYI (CRAWFORD), AN EUSOCIAL HALICTINE BEE (HYMENOPTERA: HALICTTDAE)

Published online by Cambridge University Press:  31 May 2012

Laurence Packer  and
Robin E. Owen
Laurence Packer
Affiliation:
Department of Biology, University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4
Robin E. Owen
Affiliation:
Department of Biology, University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4
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Abstract

A nesting aggregation of Lasioglossum (Evylaeus) cooleyi (Crawford) was studied on the campus of the University of British Columbia in July 1988. This species is primitively eusocial. There was a 7.3% size difference between queens and their workers; 40% of the latter had well-developed ovaries and 14% were mated. Thus, this species is one of the most primitively social members of its subgenus. The cells were not gathered together in a cluster or surrounded by a cavity. This species has a haploid chromosome number of 18, the largest number yet recorded for any Halictid bee.

Résumé

On a étudié une nichée grégaire de Lasioglossum (Evylaeus) cooleyi (Crawford) sur le campus de l’Université de Colombie-Britannique en juillet 1988. Cette espèce est primitivement eusociale. On a observé une différence de taille de 7,3% entre les reines et leur ouvrières; 40% de ces dernières avaient des ovaires bien formés et 14% étaient inséminées. Ainsi cette espèce est l’une des plus primitivement sociales de ce sous-genre. Les cellules n’étaient pas regroupées ensemble ou entourées d’une cavité. Cette espèce montre un nombre chromosomique haploïde de 18, soit le plus élevé enregistré chez une abeille halictide.

Type
Articles
Information
The Canadian Entomologist , Volume 121 , Issue 6 , June 1989 , pp. 431 - 438
Copyright
Copyright © Entomological Society of Canada 1989

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