Peckham—Revision of the Attidos of North America. 441 
of the falces are dark, not iridescent. The front half of the 
abdomen has a black integument covered with whitish pubes¬ 
cence, so that the color is gray; behind, it is much darker, with 
some coppery iridescence. There is a wide white band around 
the base, and on each side are two large irregular spots, the sec¬ 
ond reaching the spinners. The anterior one of these is orange 
color, and the second is partly orange and partly white. On the 
middle dorsum are three pairs of elongated white spots, and on 
the posterior part are two pairs of horizontal bars, which come 
off from the white spots on the lower side, and form a parenthe¬ 
sis. These spots and bars are all edged with dark bands. The 
venter has a chocolate colored band, without scales or hairs, on 
either side of which it is white. Over the whole body are many 
long white hairs. Under alcohol the legs are light reddish with 
the distal ends of the joints darkened. They are covered with 
white hairs. Under the distal ends of the tibiae of the first and 
fourth are some black hairs. The palpi are yellow with white 
hairs. 
Another variety has the abdomen white, with a dark region at 
the end; this region is iridescent in the middle, and is marked 
by two pairs of transverse white lines. The basal band shows 
faintly, its white being more solid. The front side spot and the 
dorsal spots are marked by black outlines. Cambridge draws 
two other varieties of this species (marmoratus). 
Cambridge says that his marmoratus is allied to fartilis, but 
that it has a different epigynum. His drawing of the epigynum, 
however, shows that his specimens were not quite mature. 
This species is found in Costa Rica, Mexico, and Texas 
(Brownsville). 
* 
PLEXIPPUS C. K. 1846. 
Type, Attus paykullii Aud. 1825. 
1846. Plexippus C. K., Die Arachn. XIII, p. 107 (ligo). 
1850. Plexippus C. K., Ueb. Ar. Syst., V, p. 51 (ligo). 
1876. Hasaeius E. S., Ar. Fr., Ill, p. 77 (Paykullii). 
1881. Menemerus (?) Th., St. Rag. Mai. e Pap., Ill, p. 500 (Paykullii). 
1881. Menemerus keys., Ar. Austral., p. 1461 (Paykullii). 
