. A manual for the study of insects. Insects. 236 THE STUD Y OF INSECTS. The case made by certain of the leaf-eating species is very characteristic in form (Fig. 282), being strongly taper- ing and much curved; in this instance the case is composed largely of the excrement of the larva. The Indian-meal Moth, Plodia interpunc- tella (Plo'di-a in-ter-punc-tel'Ia) is the best known of the species that infest stored provisions. The larva is the small whitisli worm, with a brownish - yellow head, that Fig. 282. spins thin silken tubes through meal yeast-cakes, or in bags or boxes of dried
. A manual for the study of insects. Insects. 236 THE STUD Y OF INSECTS. The case made by certain of the leaf-eating species is very characteristic in form (Fig. 282), being strongly taper- ing and much curved; in this instance the case is composed largely of the excrement of the larva. The Indian-meal Moth, Plodia interpunc- tella (Plo'di-a in-ter-punc-tel'Ia) is the best known of the species that infest stored provisions. The larva is the small whitisli worm, with a brownish - yellow head, that Fig. 282. spins thin silken tubes through meal yeast-cakes, or in bags or boxes of dried fruits. The moth expands about five eighths of an inch. The basal two fifths of the fore wing is dull white or cream-colored ; the outer part reddish brown, with irregular bands of blackish scales. The Mediterranean Flour-moth, Ephestia kuhniella (E-phes'ti-a kuhn-i-eFla), is an even more serious pest than the preceding species, which it resembles in habits. It has become very troublesome in recent years in flouring-mills. The moth expands about one inch, and is grayish in color. Although it is called the Mediterranean Flour-moth, its source is not definitely known. Nor do we know of any easy way of ridding an infested mill of it. Carbon bisul- phide is perhaps the most available insecticide in this case. Zimmermann's Pine-pest, Pinipestis zimnierniaiini (Pin-i- pes^tis zim-mer-man'ni), is a common species, the larva of which is a borer. It infests the trunks of pine, causing large masses of gum to exude. The moths appear in mid- summer. The Coccid-eating Pyralid, Lc^tilia coccidivora (Lae-til'i-a coc-ci-div'o-ra), differs from the other members of this family in being predaceous. It feeds on the eggs and young of various scale-insects {Pulvinaria, Dactylopius^ and Lecanmm), Figure 283 represents the different stages of this insect enlarged, and the moths natural size resting on. Please note that these images are extracted from scanned page images that may have been digitally e
Size: 1306px × 1913px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectinsects, bookyear1895
