. Economic entomology. Beneficial insects; Insect pests; Thysanura. 278 ARACHNOIDEA, CASE troubled with swarms of either this or some other species of XIV. ^ Glyciphagus in their stores of sugar. These mites wander to the hands of shopmen and those that handle the sugar, who suffer considerable annoyance from their presence, which causes a tem- porary inflammation or irritation known as the grocer's itch. No. i3. Glyciphagus cursor {Gerv., Ann. Sc. Nat. ; Acarus domesticus, De Geer). 18. Magnified sketch of ditto, copied from Gervais' figure. This species has been found by M. Fumouze, in numbe
. Economic entomology. Beneficial insects; Insect pests; Thysanura. 278 ARACHNOIDEA, CASE troubled with swarms of either this or some other species of XIV. ^ Glyciphagus in their stores of sugar. These mites wander to the hands of shopmen and those that handle the sugar, who suffer considerable annoyance from their presence, which causes a tem- porary inflammation or irritation known as the grocer's itch. No. i3. Glyciphagus cursor {Gerv., Ann. Sc. Nat. ; Acarus domesticus, De Geer). 18. Magnified sketch of ditto, copied from Gervais' figure. This species has been found by M. Fumouze, in numbers, in a parcel of Cantharides in company with species of Tyroglyphi (entomophagus and longior); Gervais found it among the feathers of dead birds and in the bodies of insects in collections. It is also found on the earth and dust of cellars, and especially in the moulds which grow there. We have said above that the Acarus domesticus of De Geer was different from the Acarus domesticus of Ger- vais, the latter being the same as Tyroglyphus Siro. The former is considered by M. Fumouze and Robin to belong either to this species or to Tyroglyphus longior, but they give the preference to this or to some allied form of Glyciphagus. Signer Moriggia (Atti. Acad. Sci. Torino I. p. 449, 1867) mentions a case which would seem to support their view, for none of the Tyroglyphi have been found parasitic, although some of the Glyciphagi have. He figures a singular horny excrescence of great length growing from the hand of a lady, and containing in its cavities great quantities of what he calls "Acarus ; The excrescence was nearly eight inches in length, tapering upwards from a wide base and curved towards the Glyciphagus 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, 1
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