David B. McCorquodale

The Cerambycidae (Coleoptera) of Prince Edward Island: new records and further lessons in biodiversity

The long-horned beetles (Cerambycidae) of Prince Edward Island are surveyed. Records of 28 species of cerambycids new to the province are provided, increasing the known fauna of this family on the island to 38 species. One species, Pogonocherus penicillatus LeConte, is removed from the list of the provinces fauna. Additionally, one exotic species, Rhopalophora tenuis (Chevrolat), is reported as intercepted from merchandise imported from Mexico. This fauna is examined in relation to its distribution within the province, biogeographical components, island biogeography, the composition of the regional fauna, the impact of anthropogenic activities, and adventive species. All these provide lessons to improve our understanding of the biodiversity of the province.

Allozyme variation in bumble bees (Hymenoptera: Apidae)

AbstractAllozyme variation at an average of 37.3 loci was assessed in queens of 16Bombus and 2Psithyrus bumble bee species from North America. The mean expected heterozygosity

The Coccinellidae (Coleoptera) of the Maritime Provinces of Canada: new records, biogeographic notes, and conservation concerns

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Quantitative Variation and Heritability of Postdiapause Development Time and Body Size in the Alfalfa Leafcutting Bee (Hymenoptera: Megachilidae)

for theBombus species was 0.008±0.006 (95% confidence limits) and that for thePsithyrus was 0.007±0.007. These levels are significantly lower than found in other Hymenoptera but are comparable to those found in previous studies of bumble bees based on far fewer loci. Neutral mutation and random genetic drift can account for the observed variation, but this implies a very small effective population size for species of bumble bees.

Do We Know Beetles? Lessons from New Records of Cerambycidae (Coleoptera) for Nova Scotia

ABSTRACT Hyperaspis brunnescens Dobzhansky is newly recorded in Canada and eastern North America from a stormpetrel burrow on Scatarie Island, Nova Scotia. This record extends the range of the species 2,100 km to the east. Hypotheses with respect to the ecology of the species are discussed, as are possible zoogeographic scenarios that might account for its presence in Nova Scotia.