
at 
Js 
ra 
. 
4 
; 
1914]. Four New Tetranychids 359 
and III, tapering sharply forward to the narrow, slightly convex frontal 
margin, also tapering considerably behind, twice as long as broad: 
bristles rather long and fine, seven each in the dorsal rows and six each 
in the sublateral rows, frontal pair half as long as subfrontal pair which 
are placed just in front of the eyes. ‘‘Thumb” of palpus very short 
and stout, on its tip is a blunt “finger” the basal width of which exceeds 
its length, midway on the upper side is a “finger” equalling the terminal 
“finger”? in length but very slender, at the upper distal corner are two 
short hairs and two others occur at the upper proximal corner. Man- 
dibular plate of average length with subparallel sides and convex at 
tip with no emargination. Legs of moderate length; femur I two and 
one half times as long as broad; tibia I somewhat longer than patella I; 
tarsus in length equalling tibia and patella together, the tarsal append- 
ages consisting of the usual series of four capitate hairs and a claw which 
is sharply bent at middle at which point arises distally a strong spur 
and proximally the usual four claw divisions. There is but a single 
eye on each side which is set in a shallow submarginal socket directly 
over coxa II. 
Type No. 19087, U.S. Nat. Mus. 
Collected at Orlando, Florida, September 28, 1914, on castor 
bean (Ricinus communis), by Mr. W. W. Yothers. This 
species appears to resemble somewhat J. tumidus Banks in the 
character of the palpus but differs substantially as follows: 
T. tumidus,—body moderately broad: subfrontal bristles not 
twice as long as frontal pair: only 1 hair on palpal ‘‘thumb’’: sides 
of mandibular plate narrowed toward tip and concave, tip 
emarginated: terminal tarsal claw four-cleft. 7. quinquenychus, 
body unusually narrow: subfrontal bristles twice as long as 
frontal pair: four hairs on palpal ‘‘thumb’’: sides of mandibular 
plate subparallel, tip not emarginated: terminal tarsal claw 
five-cleft. 
MEASUREMENTS OF FEMALE. 
z ISCrimt Hee warty rea Satine Seatac: 455 mm 
MUG Hells pth covehla & al S29) hate i Sere eee 5 eee 228 mm. 
MOrele rene enn ee eo eae .do2 mm. 
The relative lengths of the leg joints are as follows: trochan- 
ter 10, femur 25, patella 18, tibia 19, tarsus 37. 
