224 
ANNALS NEW YORK ACADEMY OF SCIENCES 
Spines on legs in both sexes: First leg — Femur, EPS, 1 row of 3 spines and 2 
additional distal spines; patella, PRS, 1 spine, RES, 1 spine; tibia, HYS, 2 rows of 
3 spines each, PRS, 2 spines, RES, 2 spines; metatarsus, HYS, 2 rows of 2 spines 
each, PRS, 2 spines, RES, 2 spines, also a distal verticellum of 5 spines. Second 
leg .— Femur, EPS, 3 rows, middle row of 3 spines, siderows of 2 spines each; patella 
and metatarsus same as in first leg; tibia, HYS, 2 rows of which 1 consists of 2 and 
the others of 3 spines, PRS, 2 spines, RES, 2 spines. Third leg .— Same as second 
leg, but tibia has besides on EPS 1 spine in middle and 1 bristle at proximal end. 
Fourth leg.— Same as first leg, but tibia has besides on EPS one spine in middle and 
one bristle at proximal end; the presence of the spine and of the bristle on the episyn- 
axial surface of the third and fourth tibia recalls spiders which F. Cambridge placed 
in the genus Arctosa ; structure of male palpus (Plate XXII, fig. 29) suggests 
Pirata ; spinnerets alike and very characteristic in both sexes (Plate XXII, figs. 26 
and 27); anterior spinnerets when in state of full erection are three times longer than 
posterior ones and considerably heavier; colulus long and covered with long hair; 
integuments all over body and on legs are covered with two kinds of hair: long black 
hair and short white hair, both kinds are simple. 
Color in alcohol: Cephalothorax reddish brown with narrow black marginal 
band and black triangular spots around dorsal groove; mandibles brown; lip and 
laminae brown, but much lighter than mandibles, with light tips; sternum in one 
male nearly black, in the other male and in female light, with 4 pairs of black margi¬ 
nal spots; legs above of the same color as cephalothorax, underneath considerably 
lighter (coxae included); 2 pairs of lateral black spots on all femora and tibiae which 
produce the impression of dark rings, although no real ring is formed; palpi of the 
same color as legs, but the darker spots missing; abdomen above dark grey, with a 
dark lancelike mark in front, behind this mark it is mottled with yellow, and these 
yellow markings remind one much of those on abdomen of Amaurobius silvestris; 
venter with a dark broad band extending from genital groove to spinnerets; spinner¬ 
ets light yellow. 
Patria: Brazil. 
Collection: A. Petrunkevitch. Two males and one female collected 
by Dr. Moenkhaus at Ypiranga, Brasil. 
