Obvious typographical errors have been silently corrected. Variations in hyphenation have been standardised but all other spelling and punctuation remains unchanged. [Illustration: Mosquitos in the Colvith River delta, Arctic Alaska, about 71° lat., July 1909. The Eskimo, Natkusiak, had stood still for a minute or two, and refrained from brushing them off, while loading a uomiak. (From the _American Museum Journal_.) [_Frontispiece_]]…
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