Elementary entomology ([c1912]) Elementary entomology . elementaryentomo00sand Year: [c1912] THE TRUE BUGS 131 in form that they would not be readily recognized as insects, were their complicated life histories not known. Three quite distinct FIG. 181. The cochineal insect a, on cactus; b, male; c, female (enlarged). (From Riverside Natural History) groups may be readily distinguished. The mealy-bugs are fre- quently found on greenhouse plants, and are so named from their mealy covering of wax and the numerous white, waxy filaments

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