358 Annals Entomological Society of America [Vol. VII, 
slender ‘‘finger”’ which is over four times as long as thick; on its upper 
side arising between middle and tip are two stout hairs, and near the 
base of upper side arise a reduced “‘finger’’ and two stout hairs; the claw 
of the penultimate joint reaches only to the basal ‘finger’; a hair 
arises ventrally from the ‘‘thumb”’’, and another laterally from the 
penultimate joint. Legs of female are of average length barely equal- 
ling length of body; those of male are about twice as long as body: 
femur between four and five times as long as thick—three-quarters 
again as long as tarsus, tibia somewhat longer than patella which is 
over twice as long as trochanter: relative length of joints as follows: 
coxa 9, trochanter 3.75, femur 14, patella 8.75, tibia 10.9, tarsus 8: tip 
of tarsus not provided with a claw—it being reduced to a vestigial 
protruberance; the customary series of four capitate hairs arise from 
the usual point. 
Type No. 19089, U. S. Nat. Mus. 
The type material from Orlando, Florida, August 16, 1913, 
from the under surface of castor beans (Ricinus communts) and 
velvet bean leaves. Collected by W. W. Yothers. Evidently 
allied to T. latus of Europe. 
NOTES. 
Mr. Yothers states that the species is an important pest of 
the castor bean plant in Florida but that at times it is controlled 
by a predaceous mite (Sczulus sp.) and by the Coccinellid 
Stethorus sp. Larve and pupe of Arthrocnodax carolina have 
been observed on infested castor bean leaves from Orlando, 
Florida. 
An ample series of measurements of material on castor bean 
from Orlando, Florida, have yielded the following averages: 




| LENGTH 
| (exclusive WIDTH FORELEG 
of palpi) 
Bemaler® -S6. ures ste ae tk nee .805 mm .267 mm. .295 mm. 
INTER ret te, 0 ee Ah ne et ae .220 mm .197 mm. .407 mm. 



Tetranychus quinquenychus, sp. nov. 
There are a number of types of coloration but the general ground- 
color is reddish-chestnut with the cephalothorax decidedly paler; the. 
prevailing design consists of a large lung-shaped blackish area on each 
side toward base of abdomen which coalesce medially toward the front, 
a similar but smaller spot on each side near posterior end of abdomen: 
legs and mouthparts pale. Body broadest midway between legs II 
