75 
Bristles in the usual 
near the front margin 
Fig. 12. — Tctronychui tekwiut: 
palpus and mandibular plate- — 
enlarged (original'). 
Tetranychus telarius Linn. 
Acantt t.hirius [inn, -Fn. Soec., 481', No. l ->74. (!7<>h. 
Tetranyckiu Knteariut Dufcror. -Ann. Sci. Nat.. WW p. 276. 
Color variable, often yellowish green, with black spots at sides of 
body, and sometimes at tip; legs pale; eyes red. Body rather broad 
in 9 . considerably tapering behind in the i . 
arrangement, the frontal and subfrontal pair as 
as in other species (Berlese figures them much 
farther back), subfrontal pair twice as long as 
frontal. The palpi are quite prominent, the 
male has a spur above on tip of the tibia, the 
thumb bears on its tip three fingers; seen from 
tin* side the lower one is plainly Larger than 
the others -those nearer the claw. The man- 
dibular plate is about twice as long as broad, 
not much tapering toward tip. broadly rounded 
at tip. and with a faint median notch; the 
stylet i> split nearly to plate. The legs are 
moderately long; femur I over twice as long 
as broad; tibia I plaiidy longer than patella I; 
tarsus quite long, ending in a claw strongly 
bent near middle and four-cleft beyond. I am 
not certain that this is the European species, but it has the characters 
of T. A /<//•///*. and does not differ, SO far as I can see. from a specimen 
of T. t, hi f!"s <h'om Italy. The legs are a trifle more slender than in 
our other species. Specimens have been studied from Melrose High- 
lands. Middlesex County. Mass.. on ash; from Waterville. N. Y.. on 
hops; and from Fore Collins, Colo., on maple. Apparently it is not 
a very common species with us. 
Tetranychus sexinaculatus Riley. 
Tt'tfitni/rhtis i iiKictihihis Riley. — Insect Life, Vol. II, p. 225. 
Pah 1 greenish-yellow, with six usually large dusky patches above, 
three on each side; legs and palpi pale. Palpi of moderate length; in 
male with a -pur above on inner tip of tibia. The thumb is quite stout 
and bears on its tip three fingers, of which the middle 
one (seen from the side) is the largest. Mandibular 
plate rat her -lender, narrowed toward dp, which 16 broadly 
rounded. Scarcely a trace of the median notch: bristles 
of body in the usual arrangement, the subfrontal pair 
scarcely twice a- long as the frontal pair. Leg- rather 
-bolter than in /'. fa&IPUft, the tibia 1 plainly longer than 
patella I; tar-u- 1 shorter than u-ual. the claw strongly 
bent near middle ami four-cleft beyond, 
from various parts of Florida on orange, and -<>nie 
Fig. 13. — Tctrany 
elms si jemaculn 
tits: palpus — 
enkuvad(Offgt 
mil ). 
Specimen' 
marked San Diego, Cal . , on orani 
appeal - to be BDJalleT 
