. The Canadian field-naturalist. 150 The Canadian Field-Naturalist [Vol. 71 LAKE AGNES LAKE LOUISE PARADISE VALLEY WENKCHEMNA VALLEY TAYLOR LAKE SMITH LAKE WHITE MAN PASS. Figure 1. Sketch map of Banff National Park showing the location of collections of Grylloblatta cafupodeiformis Walker. should place the lower limit of head size for adults at about mm. The remainder of my insects seem to fall into three groups, centered around head width measurements of , and mm. On the basis of other measure- ments, I should ascribe the smaller two of these stages to "stages A"
. The Canadian field-naturalist. 150 The Canadian Field-Naturalist [Vol. 71 LAKE AGNES LAKE LOUISE PARADISE VALLEY WENKCHEMNA VALLEY TAYLOR LAKE SMITH LAKE WHITE MAN PASS. Figure 1. Sketch map of Banff National Park showing the location of collections of Grylloblatta cafupodeiformis Walker. should place the lower limit of head size for adults at about mm. The remainder of my insects seem to fall into three groups, centered around head width measurements of , and mm. On the basis of other measure- ments, I should ascribe the smaller two of these stages to "stages A" and "Stage B" of Walker (1919). The largest group of my nymphs falls between "Stage B" and maturity. There docs not appear to be a different num- ber of instars in males and females. Thus, there is at least preliminary evidence of four nym- phal instars. DISCUSSION Grylloblatta campodeijormis Walker is prob- ably not a particularly rare insect within the rather special local where it is able to live. During the season of 1956, the insect was recovered from eight locations, only two of which have previously been reported. No doubt, further collecting would reveal the in- sects almost anywhere in the main chain of. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ottawa Field-Naturalists' Club. Ottawa, Ottawa Field-Naturalists' Club
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