. The microscope and its revelations. t Gamasidce; partly so in the Txodidce; and usually soft in mostother families, and often minutely striated. The hairs and otherappendages of the integument of a similar nature are often verycharacteristic and extraordinary. In the nymph of Leiosoma palum-cinctum they are large scale-like processes of a Japanese-fan shape,which entirely cover up and conceal the body of the creature; aleaf-like form is also common. In Glydphagus pltimiger they areelegant plumes; in some Sarcoptidce, Symbiotes tripilis, some ofthe simple setiform hairs are three times t
. The microscope and its revelations. t Gamasidce; partly so in the Txodidce; and usually soft in mostother families, and often minutely striated. The hairs and otherappendages of the integument of a similar nature are often verycharacteristic and extraordinary. In the nymph of Leiosoma palum-cinctum they are large scale-like processes of a Japanese-fan shape,which entirely cover up and conceal the body of the creature; aleaf-like form is also common. In Glydphagus pltimiger they areelegant plumes; in some Sarcoptidce, Symbiotes tripilis, some ofthe simple setiform hairs are three times the length of the body:in the Trombidiidce the body-hairs are often extremely fanciful. Thesetiform hairs are the principal organs of touch, those on the frontlegs being specially important. So sensitive arc ihcv that C/tei/letusand some Gamasids, which are predatory and rapture such activecreatures as Tln/f<«ii«i-i<hr, are entirely eyeless, and trust to thetactile sense only. Haller was of opinion that certain specialised V -. •.tiC MITES IOIJ hairs had an auditory function. In the Ixodidw a singular drum-like structure in the first leg has been considered by Haller andothers to be the hearing organ ; while in the Oribatidce that organappears to be located in the pseudo-stigmata, two paired organs atthe side of the cephalo-thorax which were long taken for true stig-niata. The Gama&idce, Oribatidce, Tyrogl>/plii<l<i, Sarcoptidce, entirely without special organs of vision. The Hydrachnidcehave two pairs of simple eyes, each pair being so close together asto look like a single eye. The Trombidiidce mostly have simpleeyes, the number and position of which vary with the to internal anatomy it should be noted that there is almostendless variety. The alimentary canal most commonly consists of along thin (esophagus, provided with distensor muscles on each side,so as to make it a sucking organ ; it usually passes right through orclose un
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmicrosc, bookyear1901
