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Show 750 MR. P. O. PICKARD CAMBRIDGE ON [June 16, Genus E U P I U S , E . Simon, 1888. Type. F. atramentarlus, E. Sim. (? ), Ann. Soc. Ent. Pr. 1888, p. 213. 17 m m . long. Hab. Guatemala. PUFIUS AURICOMIS, E. Sim. (Plate XXXV. figs. 4, 6, 8,16.) 6* 2 • Hab. Santarem, Lower Amazons. 6 12-5 m m . long.; 2 17 m m . long. In coll. Brit. M u s . Nat. Hist, o* new. $ . Colour. Carapace and basal joint of mandibles black, clothed with fine golden hair. Sternum, coxae of pedipalp and of first pair of legs deep pitch-brown. Pemora black, apex tinged with pink ; patella pitch-brown ; tibiae of legs black, of pedipalp pitch-brown ; protarsi and tarsi slightly paler; 2nd, 3rd, and 4th pair of legs pitch-brown, paler towards extremity. Tibiae and protarsi each with two dark annulations, one at the apex, the other at or towards the base. Coxae and trochanter of pedipalpi and all four pairs of legs clothed above with golden hairs. Abdomen pitch-brown, with a central, dorsal band of fine golden hairs, more scattered laterally towards apex. Ventral area brown ; spinners paler, second and third joints suffused with dark brown. Carapace longer than broad, finely granulate; cephalic area occupying over half the length of carapace; central fovea deep, recurved. Cephalic and thoracic impressions well marked. Ocular tumulus low, height double its breadth. Central anterior eyes large, circular, half a diameter from margin of clypeus, half a diameter apart, almost in contact with anterior laterals; less than a quarter diameter from posterior centrals. Anterior laterals reniform elliptic ; their axis rather less than diameter of anterior centrals. Posterior laterals ellipsoid, their axis equal to half the axis of anterior laterals and one quarter their axis from them. Posterior centrals very small, their axis equal to one third the diameter of the anterior centrals, ellipsoidal, less than half an axis from lateral posteriors, almost two diameters of anterior centrals ^Sternum longer than broad, finely granulate and sparsely tuberculate, with a longitudinal smooth central channel; its width one third less than its length ; posterior margin fringed with stiff separate dark hairs. Sigilla well marked, especially 1st, 2nd, 3rd, and 4th pairs; 2nd and 3rd marginal. Mandibles without rastellum. Inner margin of fang-groove armed with a single row of eight conical teeth, its floor studded towards the base with minute cusps ; outer margin fringed with rufous hairs, inner with a few fine hairs. Labium, longer than broad, attenuate towards apex, with two or three minute cusps. Coxa of pedipalp twice as long as broad, finely granulate and sparsely tuberculate, studded with numerous minute cusps at base, clustered towards inner angle. Inner apical angle slightly produced and studded with minute cusps. Inner margin thickly fringed with rufous hairs. Tibia ot pedipalp incrassate, fringed with long hairs; tarsus short, dilate, |