Forest entomology . omparatively small, and if accurately measuredwould probably be about•75 mm. in length. A cursory examinationshows that two forms ofscale appear on the stems—the male form (fig. 203)and the female form (). Sometimes we findboth sexes on the sametree, at other times onlyfemales are found. Inthose cases where themale form preponderates,a whitish appearance ispresented, as in fig. 203,where the male scales, orpuparia as they are called, entirely cover the bark of the young two forms, as seen collectively by the naked eye in figs. 203and 204, and individually
Forest entomology . omparatively small, and if accurately measuredwould probably be about•75 mm. in length. A cursory examinationshows that two forms ofscale appear on the stems—the male form (fig. 203)and the female form (). Sometimes we findboth sexes on the sametree, at other times onlyfemales are found. Inthose cases where themale form preponderates,a whitish appearance ispresented, as in fig. 203,where the male scales, orpuparia as they are called, entirely cover the bark of the young two forms, as seen collectively by the naked eye in figs. 203and 204, and individually magnified in fig. 205 (7 and 3), representthe male and female forms of Chionaspis salicis. If we lift a perfect female scale any time during the wintermonths, turn it over, and examine the under side with a lens, or asan opaque object with an inch objective, a considerable number ofbeautiful red eggs will be noticed (fig. 205 (4)). In my younger days,when working in the woods, I have often rubbed my thumb-nail o. ig. 203. — Male scales ofChionaspis salicis on,bark of a young ash-tree. Fig. 204.—Female scalesof Chionaspis salicison, stem of a five-year-old balsam poplar. if 210 FOREST ENTOMOLOGY. against the bark infested with Chionasjpis, and sincerely designatedthe squashed eggs as blood. Subsequent research with the micro-scope has yielded many happy hours with what was originallycrushed in a careless and thoughtless manner. These eggs are ofa chocolate colour in autumn, just after oviposition, but become
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