. Agriculture of Maine : ... annual report of the Commissioner of Agriculture of the State of Maine. Agriculture -- Maine. 204 AGRICULTURE OF ,(.'./' ^ '1 C •' .^?'; \^A i ? .',\,)! Fig. 12. Aspidiotus perniciosus; a, young larva and developing San Jose scale, showing sucking beak with setae separated, with enlarged tarsal claw at right; b, dorsal view of same, still more contracted, with the first waxy filaments appearing; c, dorsal and lateral views of same; somewhat contracted, illustrating further developement of wax secretion; d, later stage of same, dorsal and lateral views,
. Agriculture of Maine : ... annual report of the Commissioner of Agriculture of the State of Maine. Agriculture -- Maine. 204 AGRICULTURE OF ,(.'./' ^ '1 C •' .^?'; \^A i ? .',\,)! Fig. 12. Aspidiotus perniciosus; a, young larva and developing San Jose scale, showing sucking beak with setae separated, with enlarged tarsal claw at right; b, dorsal view of same, still more contracted, with the first waxy filaments appearing; c, dorsal and lateral views of same; somewhat contracted, illustrating further developement of wax secretion; d, later stage of same, dorsal and lateral views, showing matting of wax secretions and first form of young scale. All greatly enlarged. (Howard and Marlatt. Bulletin 62, Div. of Entomology, U. S. Dept. of Agri.). "After crawling about for a few hours, the young larva settles down and slowly works its long, bristle-like sucking beak through the bark, folds it antennae and legs beneath its body and con- tracts to a nearly circular form. The development of the scale begins even before the larva becomes fixed. The excreticm starts in the form of very minute white fibrous waxy filaments, which spring from all parts of the body and rapidly become more numerous and dense (Fig. 12 b, c). Within two days the insect becomes entirely concealed by the white or pale grayish- yellow shell or scale, which now has a prominent central nipple (Fig. 12 d). In the early history of the scale it maintains its pale whitish or grayish-yellow color, turning gradually darker gray. The male and female scales are exactly sifniliar in size, color and shape until after the first molt, which occurs twelve days after the emergence of the larva. With this molt, however,. 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 Maine. Dept. of Agriculture. Augusta : [State of Maine, Dept. of
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