. Annual report. 1st-12th, 1867-1878. Geology. Fig. 13.—Hairy potato-maggot (Homalomyia tuberosa?) a, larva; &,the same enlarged twice. After Curtis. Description of Ike larva (Fig. 13: a, natural size; b, magnified twice).—Head minute, fleshy, not seen in the pupa-case. Body flattened, cylindrical, ovate. Prothoracic seg- ment flat, square, trapezoidal. On the body are two rows of long, slender dorsal spines or hairs, two rows of lateral longer hairs (seen under a high magnifying power to have short spiracles), one subdorsal, the other subvential. The last four dorsal are longer than those
. Annual report. 1st-12th, 1867-1878. Geology. Fig. 13.—Hairy potato-maggot (Homalomyia tuberosa?) a, larva; &,the same enlarged twice. After Curtis. Description of Ike larva (Fig. 13: a, natural size; b, magnified twice).—Head minute, fleshy, not seen in the pupa-case. Body flattened, cylindrical, ovate. Prothoracic seg- ment flat, square, trapezoidal. On the body are two rows of long, slender dorsal spines or hairs, two rows of lateral longer hairs (seen under a high magnifying power to have short spiracles), one subdorsal, the other subvential. The last four dorsal are longer than those in front. The end of the body forms a flat, smooth declivity, on each side of the front edge of which is a thick, stout, short spine (a produced spiracle), much thicker than the others, and ending suddenly in four short, blunt spines. Behind these two spines, on the side of the declivity, are six hairs, with short, slender respiratory hairs on the basal half. Some of the lateral hairs have similar lateral respiratory fila- ments, but they are less distinct than on the six terminal hairs. The under side of the body is flattened. The spiracles at the base, on each edge of the first segment behind the head, have six long, slender respiratory processes. Length, inch. This descrip- tion will also apply to the pupa-case. It is easy to see how maggots like these, which bury themselves in cabbages and potatoes, may become swallowed with the food, and if the latter is only partially cooked and hastily swallowed, how the living worms become conveyed into the stomach, and become so annoying that the doctor has to be sent for. The European Homalomyia scalaris, or " ladder-maggot," is not unfrequently voided from the bowels of boys and adults in both 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 origina
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Keywords: ., bookcentury1800, bookdecade1860, bookpublishe, booksubjectgeology
