First leg much enlarged, especially the femur, patella, and tibia; tibia with a well developed ventral black fringe (Fig. 212).
Spines. First leg: femur only dorsal 0-1 (long, slender)-l~l (both the latter, small and short)-0; patella 0; tibia only ventral 2-2-2 (fairly well matched and occupying the distal two thirds of segment;) metatarsus only ventral 0-2-2. Second leg: femur only dorsal 0-1-1-1-0 (size as in first); patella 0; tibia only ventral 0-lr-lr; metatarsus prolateral 0-1, ventral lr-lr. Third leg: femur and patella as in second; tibia 0; metatarsus only prolateral and retrolateral 0-1. Fourth leg: femur and patella as in second; tibia and metatarsus 0. Palpal spines 0.
Abdomen. Ovoid; longer than wide in ratio of about 2:1; widest about the middle; spinnerets of moderate length and size; tracheal spiracle near base of spinnerets, with distinct lip but with no tubercle; position of colulus indicated by a tuft of black hairs.
Epigynum. Simple, small; epigynal plate somewhat longer than wide; posterior margin with a shallow notch; near center of plate are two small, obliquely placed slits (Fig. 213).
Color in alcohol. Carapace; generally brown, darker in interocular area, eyes on black spots; a few white lanceolate hairs scattered over surface and concentrated along posterolateral margins. Chelicerae light yellowish brown; maxillae and lip the same with whitish tips. Sternum brownish. Legs: first pair light reddish brown except yellowish white tarsi and metatarsi, white lanceolate hairs on prolateral and dorsal surfaces of distal ends of femora, patellae, and tibiae; all coxae and trochanters yellowish white and becoming progressively whiter toward the fourth; second pair of legs yellowish white with prolateral brown stripes on femora, patellae, and tibiae, and retrolateral brown Stripe on femora; third and fourth much like second; all from second to fourth with many white lanceolate hairs on dorsal surfaces. Abdomen: generally dull brown; at end of first third a pair of white dorsolateral bars do not quite meet dorsally; lateral sides dull brown; venter a lighter brown; whole abdomen with many clear iridescent scales; spinnerets yellowish.
Type locality. Female holotype from El Valle, R. P., July, 1936. No paratypes.
Genus Atelurius Simon, 1901
Atelurius incertus Banks, 1929
Figures 214–218
Mr. Banks ('29) had a single female from the Canal Zone Biological Area, July, 1924. Simon established the genus on the basis of a species
