164 MR. F, PICKARD-CAMBRIDGE ON NEW SPIDERS. [Feb. 17, 
the middle and again slightly above the spinners, broadly margined 
with pure white pubescence. Femora of legs deeply blotched and 
streaked above with black; tibiz distinctly, protarsi indistinctly 
annulated. Vulva without any central tongue, but with two 
small cusps in the middle and two separate posteriorly converging 
Jateral sclerites, quite distinct in form from that of any other 
species here recorded (see Plate XV. fig. 2). 
This specimen was identified by Keyserling as 7’. longitarsis 
CliaiKtochea Seekps lane 
Hab. Braztu, Rio Grande do Sul (Keys. Coll.). 
Genus Hesyprus Simon, 1898 (June 30). 
Simon, Hist. Nat. Ar. 2, u. p. 315. Type, H. palustris Simon. 
Ecuador. 
The species belonging to this genus are very closely allied to 
Trechalea, but form a small group chiefly distinguishable by the 
glabrous, gibbous mandibles, with a well-marked carina on the 
outer side, in the male sex. The legs in both sexes are subequal 
in pairs 4-2, 1-3; being also much shorter in proportion than in 
Trechalea. Both margins of the fang-groove with 3 teeth. Eyes 
as in 7'rechalea, central posteriors slightly over one diameter 
apart; clypeus low and porrected. Tibia and protarsus i. with 
2—2—2-2 spines beneath; protarsi 1-4 with a small central apical 
spine beneath. 
In Biol. Centr.-Amer., Arach. Aran. ii. p. 305, I have referred 
the species given as the type of Hesydrus (sec. 2a, H. jullient) 
to Hnna O. P.-Cambr., and the name Hesydrus i is applicable to the 
species under sec. la with H. palustris as the type. It appears 
that Simon has somehow confused the characters of these two 
groups. In Hnna (including H. jullieni) undoubtedly the clypeus 
is more vertical; the central posterior eyes are two diameters 
apart, or more, and the anterior row is not wider than the 
posterior central row ; while the tarsi are straight and not flexible. 
Bubypume vez palustris (for if not identical, the form before me 
is certainly congeneric with this species) the clypeus 1s porrect, 
the central poster lor eyes one diameter apart, the anterior row 
wider than the posterior central, and the tarsi flexible; the eyes 
of the posterior row are certainly not equidistant, a character 
given for distinguishing Hesydrus from Trechalea. Fortunately, 
however, the citation of a definite type species enables one to 
rectify the confusion. 
The two species known to me may be recognized by the 
following characters :— 
a. Tibial spur of palpus, seen from above its apex, not bifid, 
slightly emarginate and prominent at its angles, but 
not incurving in the form of two teeth ............ . habilis O. P.-Cambr. 
b. Tibial spur of “palpus, seen from above its apex, deeply 
bifid, its angles forming two sharp teeth curving in- 
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