. The Acarina or mites. A review of the group for the use of economic entomologists. Mites. FiG. 32.—Fkobia hel- Icri. (Original.) Fig. 3-i.~Picobia hcUcri: Tarsus and head. (Original.) gration. One of these was recorded from Arizona by Hancock as Picobia villosa, which Trouessart states is the same as P. bipectinatus Heller of Europe. Trouessart also claims that this is not an adult mite, but that it is a stage (which he calls ''s\Tin- gobial") in the life of a Cheyletiella. Syringophilus (Picobia) is not a stage of Cheyletus nomeri Trouess., as held by Trouessart, but a very distinct fo
. The Acarina or mites. A review of the group for the use of economic entomologists. Mites. FiG. 32.—Fkobia hel- Icri. (Original.) Fig. 3-i.~Picobia hcUcri: Tarsus and head. (Original.) gration. One of these was recorded from Arizona by Hancock as Picobia villosa, which Trouessart states is the same as P. bipectinatus Heller of Europe. Trouessart also claims that this is not an adult mite, but that it is a stage (which he calls ''s\Tin- gobial") in the life of a Cheyletiella. Syringophilus (Picobia) is not a stage of Cheyletus nomeri Trouess., as held by Trouessart, but a very distinct form; indeed Xorner had described the male and egg of Syringophilus. The like- ness between the two is a convergence due, as shown by Oudemans, to their common habitat, the interior of the quills of feathers, both being elongate and with short legs. Family AXYSTID^. There are few species of mites in this family, but one is very common and beneficial. Most of them are at once separated from all other Trombidioidea in that tlie coxae are close together and arranged in a radiate man- ner. The body shows no complete division between cephalothorax and abdomen, although in the t^-pical genus the division is often indicated just bcliind the third pair of legs. The body, which is usually short and broad, is provided with many stout bristles. In front on each side are one or two simple eyes. The mandi- bles are quite large and prominent, and taper to a point which is tipped by a curved claw. The palpi are prominent but slender; in Tarsotomus with a long "thumb/' but in Anystis the last joint is torniinal. The legs are large and long, gradually tapering and provided with many long hairs or bristles. They are six or seven jointed, and terminate in two or three claws. In some species the tiu-sus is divided into a number of small joints. On the venter (fig. 35; are genital and. Fig. 35.—Venter of A nystis. (Au- thor's illustration.). Please note that these images are extracted from s
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