138 MAINE STATE COLLEGE 



The palpi and legs, especially in older specimens, are tinged 

 with orange. The young are smaller, paler and have only six 

 legs. ' Body and legs clothed with stout bowed hairs. There are 

 four rows of about five hairs each on the dorsal aspect of the 

 bod}'. Eyes carmine, composed of two facets placed one ahead 

 of the other, and obscurely bilobed. Palpi about one-fourth the 

 length of the body. Eggs spherical, diameter variable, length 75 to 

 about 110 micromillimetres, glassy, scattered and loosely attached 

 to the web. Web delicate, filmy, stretched loosely over the surface 

 of the plant, principally on the under surface of the leaves, 

 though sometimes the upper surface is covered, often stretching 

 across from leaf to leaf, or from the stem to the petioles. They 

 are more plentiful along the principal veins, especially where they 

 join the petiole, also in the angle where the petioles join the leaf, 

 being plainly visible to the naked eye and giving a glassy or 

 silvery reflection from the surface covered. Fibers of the web 

 are from 10 to 20 micromillimetres in diameter but apparently 

 composed of smaller fibrils. The web does not seem to be 

 geometrically constructed as that of the spider. The mites walk 

 freely over the surface or secrete themselves beneatb it. The 

 feet are long and the movement of the mite slov7 and spider-like. 



Microscopic Characters. 



The body, legs and mouth parts magnified five hundred diame- 

 ters appear finely corrugated, the ridges and furrows often less 

 than .001 m m. wide. On the under side of the body toward the 

 posterior end is an elevation in which the corrugations are much 

 wider and zig-zag. This probably marks the location of the 

 spinerets and anal opening. The stout hairs clothing the body 

 are in full grown specimens often one-fourth the length of the 

 body, or about .15 m m. The eye facets are about .05 mm. in 

 diameter. The hairs on the legs are about four times as long as the 

 legs are wide where they occur, or sometimes fully .1mm. long. 

 The legs are composed of seven joints exclusive of the moveable foot 

 portion. The seventh joint is short, a little longer than the three 

 segments of the foot combined and has but little movement with 

 the sixth joint. The foot portion is composed of three joints, the 

 proximal two about equal in size, same length but wider than 

 long ; terminal segment curved and ending in a two claws ; each 

 fork ending in a brush of about three stiff, pointed, spreading 

 hairs. At the back on the end of the preceeding segment arise 

 four stiff bowed hairs over .02 m m. long ending in hemispherical 



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