Material: female holotype - ISRAEL: Even Yiz'haq (157-218), II. 1987, coll. V. - B. ROTH. Det. J. Proszynski. Coll. HUJ.

Etymology: named for prominent arachnologist, student of Salticidae behavior, Dr. Robert Jackson of Canterbury University, Christchurch, New Zealand, who contributed a number of species collected by himself in the Israel.

Diagnosis. Abdomen grey without contrasting stripes, epigynal depressions transversally oval, shorter than half length of epigyne, separated by a septum.

FEMALE

Cephalothorax dark brown, covered with mixed dark, whitish and white, adpressed, very small and indistinct setae; eye field blackish; dorsum of thorax lighter brown; sides blackish brown; more noticeable concentrations of white setae produce an indistinct elongate spot around dorsal rim of eyes III, which extends slightly behind, and fragments of two loose white streaks on the lighter brown, posterior, thoracic slope. There are no dorsal white streaks, at least in the studied specimen; sides with sparse whitish setae, there is no white, ventral margin.

Abdomen covered with dark grey setae and devoid of contrasting stripes, there is a median longitudinal row of several dark and light chevrons, not sharply outlined, they are slightly larger and more contrasting than in related, similarly colored species; the stripe is separated from margins of abdomen with thin darker lines. Sides of abdomen are slightly lighter than dorsum.

Frontal aspect: anterior end of the eye field with dense, black bristles stretching horizontally or diagonally forwards above eyes I, there is a concentration of dense white setae between the bases of these bristles, and partially hidden by them. Eyes I surrounded by spots of inconspicuous, light fawn and dark setae; clypeus brown, with sparse, colorless and brown setae, appearing almost bald. Pedipalps appear light yellow pedipalps; legs I dark, annulated.

Ventral aspect generally brown, including abdomen. Legs brown with darker annuli, tarsi I with indistinct scopula.

Epigyne has a pair of large grooves with sclerotized rims, separated by a narrow sclerotized septum. Copulatory openings are hidden beneath the anterior rim of the depression and are unusual by their longitudinal, median orientation. The copu~la~tory channels are short, broad at the openings, runs originally sidewards, then turn anteriorly and narrows; finally join spermathecae. Spermathecae are unusual by their transversal position in the anterior part of the epigyne, without part turned posteriorly, they are heavily sclerotized, oval body with internal convoluted chambers.

Male of Ph. jacksoni unknown.

Distribution: Israel: Even Yiz'haq. Seasonal appearance of adult female - II.