Archive image from page 481 of Cuvier's animal kingdom arranged. Cuvier's animal kingdom : arranged according to its organization cuviersanimalkin00cuvi Year: 1840 470 ARACHNIDA. terminated in various ways, according to their habits. Some of these insects {Acarides, Latr.) have eight legs, fit only for walking, and chelicerae. Trombidhim, Fabr., has the chelicerae terminated by a moveable claw ; palpi projecting;, pointed at tip, with a moveable appendage or finger beneath the extremity ; two eyes, each at the top of a small fixed peduncle. T. holo- sericeiim, Fabr., very common in garden
Archive image from page 481 of Cuvier's animal kingdom arranged. Cuvier's animal kingdom : arranged according to its organization cuviersanimalkin00cuvi Year: 1840 470 ARACHNIDA. terminated in various ways, according to their habits. Some of these insects {Acarides, Latr.) have eight legs, fit only for walking, and chelicerae. Trombidhim, Fabr., has the chelicerae terminated by a moveable claw ; palpi projecting;, pointed at tip, with a moveable appendage or finger beneath the extremity ; two eyes, each at the top of a small fixed peduncle. T. holo- sericeiim, Fabr., very common in gardens during spring, of a blood-red colour, with the abdomen nearly square, and narrowed behind. A much larger species (T. chictorium, Fabr.) inhabits the East Indies, and emits a red dye. Erythrœus, Latr., has the chelicerae and palpi of Trombidium, but the eyes are sessile, and the body not divided. E. phalangioides, Latr. Gamasus, Latr., has the chelicerae didactyle, and the palpi projecting, distinct, and filiform. In some, the body is covered entirely, or in part, by a scaly skin, but in others it is entirely soft. Some of the latter species live upon different birds and quadrupeds. Others, as the Acarus telarius, Linn, [or the Red Spider of the hot-houses], form, upon the leaves of various vegetables, especially upon those of lime-trees, very fine webs, which injure them greatly. This species is reddish, with a black spot on each side of the abdomen. Cheyletus, Latr., has didactyle chelicerae ; but the palpi are thick, arm-like, and terminated by a sickle-shaped joint. A. enidiiiis, Schr. Oribata, Latr. (Notaspis, Herm.), has the chelicerae also didactyle; the palpi very short, or concealed; the body covered with a hairy, scaly skin ; feet long, or moderate. The front of the body is advanced like a beak. Found upon stones, trees, in moss, &c. They creep but slowly. XJropoda, Latr., has, from analogy, forceps-like chelicerae ; palpi not projecting ; body covered with a scaly
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