. Economic entomology. Beneficial insects; Insect pests; Thysanura. 234 ARACHNOIDEA. CASE on the underside, make them all take the same position, slightly inclined, with their anterior feet in the air. If they are touched, they set a-running; but in place of finding these mites on the house-fly, as De Geer had done, it was exclusively on the stable- fly, Musca stabulans, that Dujardin found them in Paris, in 1846 or 1847, in a neighbourhood where there were many stables. That fly appeared infested by the Hypopus in such numbers^ that out of three, it was rare that two or more were not found ch
. Economic entomology. Beneficial insects; Insect pests; Thysanura. 234 ARACHNOIDEA. CASE on the underside, make them all take the same position, slightly inclined, with their anterior feet in the air. If they are touched, they set a-running; but in place of finding these mites on the house-fly, as De Geer had done, it was exclusively on the stable- fly, Musca stabulans, that Dujardin found them in Paris, in 1846 or 1847, in a neighbourhood where there were many stables. That fly appeared infested by the Hypopus in such numbers^ that out of three, it was rare that two or more were not found charged with them, while the house-fly, and several other species of flies, and of Anthomyia, which were quite as abundant, never furnished him with a single individual. In the species on that fly the four anterior feet are disproportion- ately robust, and terminated by a single strong claw; the legs of the third pair are couched in a for- ward direction, under the margin of the body, which conceals them en- tirely, and those of the last pair termi- nate in a long hair, instead of a claw; but in other species all eight legs have a claw. The haunclies are contiguous, and usually form a thick median line, but the most extraordinary part of the whole is the head, which is produced into a flat and narrow blade, cut square at the extremity, and from the angles of which proceed two diverging bristles or hairs, but without any trace of mouth or even rudimentary oral organs. Still, although no trace of opening can be seen in this blade, it occupies the place and has a good deal of the appearance of a sucking apparatus. Near the posterior margin of the under. 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 Murray, Andrew, 1812-1878. [London] Chapman and Hall
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