1903. | MR. F, PICKARD-CAMBRIDGE ON NEW SPIDERS. 157 
Mandibles long, slender, more than twice as long as height of 
clypeus. Mang-groove with three denticules on lower margin, 
Maxille long, parallel, dilate at apex; labiuim broad, half the 
length of maxille, truncate at apex. 
Sternum longer than broad, cordiform, produced posteriorly 
between coxie iv. into a broad rounded plate, the cox being their 
own diameter apart. Legs 1,4,2,3. Femora with two long 
dorsal spines and several others on the sides and apex. Femur i. 
with two long spines in front in apical half. Tibia i. and ii. with 
2—2-2-2-2 long spines beneath, the longest (the basal) being half 
as long as the segment itself, cial lateral spines; 1—1 dorsal. 
Protarsus i. and ii, with 2-2—-2—2 long spines beneath (basal pair 
longest): 1—1 lateral, 1—] ae Spines on tibia and pro- 
tarsus lil, and iv. numerous, but less regular. Patellee 1-4 with 
a single long apical spine. Scopula absent. Tarsal claws 3, 
superiors with three or four denticules beneath. Spinners 6, 
posteriors longest. Pedipalp with large tarsal claw, having 3 
very long denticules beneath towards base. Vulva, see Pl. XIV. 
fig. 12. 
Hab. Asingle 9 from the Parana Buyassu, near Breves, Lower 
Amazons. 
Genus TrecHaLeA Thorell, 1869 (nom. nov. for Vriclaria). 
Type, 7. longitarsis (C. L. Koch), Colombia. Sub 7rielaria 
(1848), nom. preeoce. by Wagler for Aves (1832). 
The following characters are common to all the species men- 
tioned below :—Teeth on upper margin of fang-groove 3, on the 
lower, 3, 4, or 5. =Tarsi long and feible! Tibia i. with four 
pairs of spines beneath, the last pair small and apical, besides two 
lateral spines. Protarsii. with four pairs of spines beneath (often 
irregularly situated); protarsi of all four pairs with a small 
central apical spine beneath. Anterior row of eyes slightly 
recurved, extending laterally slightly beyond the posterior 
eentrals. Lateral anteriors smaller than the central anteriors. 
Legs variable in length, 4, 2, 1, 3. Clypeus variable in height, 
porrect, and the eyes also variable in their relative positions. 
As regards the type-species of the genus, two distinct forms 
have been identified as longitarsis of Koch—one by Keyserling, 
now in coll. Brit. Mus., a female, having 5 teeth; the other by 
Simon (Ann. Soc. Ent. Belg. xlii. p. 20, 1898), male and female, 
having 3 teeth. Since they cannot both be the true longitarsis, 
I describe Keyserling’s identification as a new species, for it is 
totally distinct from examples from Colombia, now before me, 
whence the type of the genus originally came. It forms, indeed, 
the type of a distinct group, so entirely different is the form of 
the vulva from that of the typical Trechalea from Colombia. 
At present, however, although the identity of 7’. longitarsis 
cannot be settled ial absolute certainty until an examination 
of the type-specimen (if it still exists in the Imperial Museum at 
