. Annual report. Entomological Society of Ontario; Insect pests; Insects. SOCIETY OF ONTARIO - 1955 25 Gait and then east to include a strip along the north shore of Lake Ontario through Halton and Peel counties and the western part of York County to a spot just east of Toronto". This boundary shows a good correlation with isopleths, presented by Putnam and Chapman (15), for the length of the frost-free period Or length of the growing season. So the location of the boundary is probably related to climatic conditions rather than to edaphic factors. Plants are more clearly zonal in their di
. Annual report. Entomological Society of Ontario; Insect pests; Insects. SOCIETY OF ONTARIO - 1955 25 Gait and then east to include a strip along the north shore of Lake Ontario through Halton and Peel counties and the western part of York County to a spot just east of Toronto". This boundary shows a good correlation with isopleths, presented by Putnam and Chapman (15), for the length of the frost-free period Or length of the growing season. So the location of the boundary is probably related to climatic conditions rather than to edaphic factors. Plants are more clearly zonal in their distribution than most animals and attempts to define faunal areas by their animal inhabitants are complicated by the evident ability of animals to wander from their native range. Life zones do, however, have characteristic animals associated with them and one of the major contributions to the study of life zones in North America, that of Merriam (12), was based largely upon the study of the distribution of mammals. Two recent monographs on insects of North America, Klotz (9) and Muesebeck et al. (14), include maps showing life zones in North America. Both these maps indicate the Carolinian Zone of southern Ontario as an extension northward of the Upper Austral. Klotz (9) presents a list of 17 species of butterflies characteristic of the Austral ODONATA One order of insects in which several species are known to be restricted, in Ontario, to the Carolinian Zone is the Odonata. Walker (18) reports that in general the Carolinian fauna in Ontario is rich in Zygoptera and Libellulidae and comparatively poor in Corduliidae and Aeschnidae. His list of species restricted in Ontario to the Carolinian Zone or rarely found beyond its limits is as follows: Zygoptera—Hetaerina americana (Fabr.), Argia apicalis (Say), A. tibialis (Rambur), A. translata Hagen, A. sedula (Hagen), Anomalagrion hastatum (Say); Anisoptera—Perithemis tenera (Say), Libellula semifasciata Burm., Pachydipla
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectinsects, bookyear1872
