. A manual for the study of insects. Insects. 486 THE STUDY OF INSECTS. tinct. The two following are well-known members of the Trypetinae. The Apple-maggot, Trypeta pomonella (Try-pe'ta pom-o- nel'la.)—This maggot eats into the pulp of apples, boring tunnels in all directions through the fruit; it attacks espe- cially the early maturing varieties. When full-grown it goes into the ground to transform. The adult is a black and white fly, with banded wings (Fig. 592). The Round Goldenrod Gall.—One of the most familiar of abnormal growths on plants is a ball-like enlargement of the stem of goldenr
. A manual for the study of insects. Insects. 486 THE STUDY OF INSECTS. tinct. The two following are well-known members of the Trypetinae. The Apple-maggot, Trypeta pomonella (Try-pe'ta pom-o- nel'la.)—This maggot eats into the pulp of apples, boring tunnels in all directions through the fruit; it attacks espe- cially the early maturing varieties. When full-grown it goes into the ground to transform. The adult is a black and white fly, with banded wings (Fig. 592). The Round Goldenrod Gall.—One of the most familiar of abnormal growths on plants is a ball-like enlargement of the stem of goldenrod (Fig. 593). This is caused by a maggot, which lives within it, and which develops into a pretty fly with banded wings. This is Trypeta solidaginis (T. Sol-i- dag'i-nis). There is another gall on Fig. 593.—The Round Golden- the stcm of goldenrod which is liable to be mistaken for this one, but which can be easily distinguished from it. It is more elongate, and is hollow. It is made by the larva of a Tineid moth, Gelechia gallcBsolidagmis (Ge-le'chi-a gal-lae-sol-i-dag'i-nis); it may be called the EUiptical Goldenrod Gall. The Stem-eyed Fly, Sphyracephala brevicornis (Sphyr-a- ceph^a-la brev-i-cor'nis) is a very singular fly, which is found on the leaves of skunk-cabbage. On each side of the head there is horn-like process extending outward, upon the end of which the eye is situated. This species is the only Amer- ican representative of its subfamily, the Diopsince (Di-op- si'nae), yet described. The Cheese-maggot, Piophila casei (Pi-oph^i-la ca'se-i) is the larva of a small black fly, less than half the size of the House-fly. It belongs to the small subfamily PiophilincB (Pi-oph-i-li'nae), in which vein II of the wings is quite closely united with vein III. This fly lays its eggs on cheese, ham, and bacon ; the larvae live in these substances and are often serious pests. They are commonly known as "skippers '* on. Please note that these images are extracted from sc
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectinsects, bookyear1895
