50 ARANEIDEA. 
PHIDIPPUS. 
Phidippus, C. L. Koch, Die Arachn. xiii. p. 125 (1846). 
Type P. variegatus, C. L. Koch. North America. 
P. variegatus, a species very closely allied to P. albulatus, described below, is typical 
of all those here referred to this genus, and has therefore been selected by me as the 
type. It is very difficult, by structure alone, to separate these spiders from those which 
I have included under Paraphidippus ; but, for convenience, I have separated out under 
Phidippus all those in which the eyes of the posterior row are distinctly wider apart 
than those of the anterior row, the small eyes are not far distant from the anterior 
lateral eyes, and the abdomen usually bears a central white triangular spot formed by 
the confluence of two cuneiform closely adjacent spots. 
The spiders themselves are 
large, stout, and thickly clothed with hairs; and the carapace is uniformly rounded on 
the sides. 
‘The species known to or identified by me may be distinguished as follows :— 
Males. 
I. Mandibles with two distinct teeth or one bicuspid tooth on the upper 
side and another single tooth below. 
* Legs i. and ii. clothed and fringed with long sulphur-yellow hairs ; 
iii. and iv. with shorter and paler yellow or nearly white hairs. 
a, Carapace tuberculate, bearing on the sides of the cephalic area a 
stout conical tubercle. Femuri. with a long thick pencil of black 
hairs, springing from the basal third of the dorsal ridge and 
curving over to the front. Carapace and abdomen black, with 
sulphur-yellow bands. Mandibles steel-blue, with yellow basal 
hairs. The spine at the apex of the palpal bulb very slender, 
sinuous, with a broad transverse basal portion . . “ 
6. Carapace not tuberculate; sides of cephalic part very widely 
rounded. Femur i. without pencil of black hairs. Carapace 
with wide white lateral bands. Abdomen light brown, with a 
posterior dorsal median longitudinal velvety-black band. Man- 
dibles black, with white basal hairs above. The spine at the apex 
of the palpal bulb with broad base, very similar to that of 
P. tuberculatus Se ee ee en 
** Legs i. and ii. clothed with brown, black, or white, or partly black 
and partly white hairs; iii. and iv. similar, but modified. 
aa. Carapace without a transverse sinuous pale band behind the 
cephalic area. 
a. Carapace, legs, and abdomen black or purple-brown, variegated 
with pure white. Mandibles metallic green, with white basal 
hairs above. 
tuberculatus, sp. 0. 
arizonensis, Peckh. 
