. An encyclopædia of gardening; . e (mite de la gale,Fr.) [A, exulcerans, L.) which inhabits the ulcers of the itch, arethe principal species mentioned by Linnseus ; but some naturalistsconsider that every animal, and most plants, have their peculiarspecies of acarus. The harvest bug is by some considered anacarus, and by others a phalangium. 2272. The common spider {Aranea) is a numerous genus, andvery prolific : as they live entirely on insects they cannot be con-sidered as otherwise injurious in gardens than by their unsightly appearance. 2273. The wood-louse {Oniscus) is of retired habits,
. An encyclopædia of gardening; . e (mite de la gale,Fr.) [A, exulcerans, L.) which inhabits the ulcers of the itch, arethe principal species mentioned by Linnseus ; but some naturalistsconsider that every animal, and most plants, have their peculiarspecies of acarus. The harvest bug is by some considered anacarus, and by others a phalangium. 2272. The common spider {Aranea) is a numerous genus, andvery prolific : as they live entirely on insects they cannot be con-sidered as otherwise injurious in gardens than by their unsightly appearance. 2273. The wood-louse {Oniscus) is of retired habits, shunning the light and the heat of the sun. Itlives on leaves, fruit, and also on animal substances, and its crust or skin like the spider. Ingardens it is easily caught by bundles of reeds or beans, or other hollow stalks, like the earwig. TheO. aquaticus {fl^. c) is common in springs and clear ponds, or cisterns of watei\ The dog-tic and water onis-cus both re<fuire to be magnified to be studied properly (/, g). Ff 2. 136 SCIENCE OF GARDENING. Part II. 227-1. Of worms (class Vermes, L.), there are only a few genera which are materially in-jurious in gardens, the earth-worm [Lumbricus), the slug (Z<i»uii), and the snail (^Helix). The slug {Umax) is without a sheU, and distinguished by its lateral pore. There are 16 Britishspecies : the L. ater {fig. 412. b), alba, and hyalinus are the most common in gardens ; and the L. agrestis{a) is common both in gardens and fields, and is the species recommended to be swallowed by consumptivepersons. The snail {Helix) is a numerous genus, and, hko tlie slug, very destructive to plants and fruit:both snails and slugs are hermaphrodite, having both sexes united in each individual; they lay their eggswith great care in the earth, and the young ones are hatched, the slugs without shells, and the snailswith shells completely formed. They are most troublesome in spring and autumn, and during mildweather in winter. In dry w
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Keywords: ., bookcentury1800, bookdecade18, booksubjectgardening, bookyear1826
