ZYGOBALLUS. 289 
Group HOMALATTES. 
The genera belonging to this group which are known to occur in Central America 
may be distinguished as follows :— 
A. Integument of abdomen not coriaceous on the dorsal area. 
1. Cephalic quadrangle of eyes wider behind (in the type-species, 
Z.vufipes). . 6 6 we ww ew ee ee Zyeosatuvs, Peckh. 
2. Cephalic quadrangle of eyes not wider behind (in the type-species, 
B.magna). 2. 1 6 ew ew we we we we ew). 6B, Peckh. 
B. Integument of abdomen coriaceous over the entire, or part of the, 
dorsal area. 
1. Sternum not prolonged behind, between coxe iv. . . . . . HomMaarrorpes, gen. nov. 
2. Sternum produced and prolonged behind, between coxe iv. . . Coccorcuesres, Thor. 
Norze.—The characters given for the various genera of this group are usually based on differences in the 
position of the eyes and are far from satisfactory. A thorough revision of the whole group, as well as of the 
Phidippeze, is needed, but it cannot be undertaken unless the Salticide of other districts are also studied. 
ZYGOBALLUS. 
Zygoballus, Peckham, Proc. Nat. Hist. Soc. Wisc. 1885, p. 81 (Dec.). 
Type Z. rufipes, Peckham. Guatemala. | 
Carapace almost square, vertically depressed behind from the posterior row of eyes. Cephalic quadrangle of 
eyes broader than long, wider behind. Legs i. longest, all four pairs slender, the first, however, stouter 
than the others ; tibia i. with 2—2—2 spines beneath, the first pair being subbasal ; tibiae and protarsi 
iii. and iv. with a few spines. 
This genus is very likely congeneric with Rhanis, C. L. Koch. The species known 
to me may be recognized from the following ‘Table, the characters of the others 
(7. parvus, Hentz, excepted) being added from Peckham’s descriptions :— 
Males. 
A. Mandibles much developed, directed obliquely forward, with a long sinuous 
fang, the basal segment bearing a long straight spur stretching forward 
above the fang, and another, more or less hammer-headed, opposite it below 
the fang. 
1. Basal segment of mandible with a longer or shorter (variable) curved cusp 
towards the apex above. Palpus and femur, trochanter, and coxa of leg i. 
red-brown. Legs ii., iii., and iv. yellow, with black slashes along the 
sides. Palpal bulb elongate-oval, without any visible spine at the apex 
(possibly not constant) -; tibial spur long, slender, and slightly sinuous. 
(Tibia i. six times as long as its diameter.) . . . 2. . 1. . . . . rufipes, Peckh. 
2. Basal segment of mandible without cusp towards the apex above. Femur, 
protarsus, and apex of tibia of leg i. brown. [egs ii., iii., and iv. yellow, 
unicolorous. Palpal bulb broader oval, with a short slender sinuous 
black spine at the apex. (Drawn from Peckham’s description and figures.) remotus, Peckh. 
BIOL. CENTR.-AMER., Arachn. Aran., Vol. II., November 1901. 2 Pt 
