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Show 1896.] SPIDERS FROM THE LOWER AMAZONS, 729 with long pink hairs. Abdomen pale ochre-yellow, almost naked, clothed with fine short scattered hairs. Sternum pale testaceous; labium, coxa? of legs and pedipalp, and upperside of legs darker ; underside of legs paler testaceous. Carapace 8 m m . long ; 7 m m . broad; 3 m m . wide at base. Cephalic area very prominent and raised above the thoracic area ; broad in front, narrowed and compressed behind, with a deep impression on either side. Thoracic area bilobate behind, with a deep impression on either side towards basal angles. Anterior row of eyes slightly procurved; centrals very small, two diameters apart, six from laterals. Lateral anteriors within one transverse diameter from margin of clypeus. Anterior row very slightly wider than posterior. Central posteriors reniform, their axis usually distinctly longer than diameter of posterior laterals ; rather over one transverse diameter from the latter. (These proportions are variable.) Base of mandibles with a rdteau in front, furnished with numerous spicules. Fang-groove armed with 4 stout teeth on the outer margin, 6 on the inner, with intermediate cusps between the two rows. Sternum, including labial plate, 7 m m . long, 4 m m . broad. Five pairs of sigilla clearly marked: 1st pair at base of labium, on either side; 2nd pair at base of labium behind, coalesced to form a deep longitudinal furrow; 3rd, 4th, and 5th longitudinal ; central convergent, far remote from margin, coalescing to form a deep central depression. Spinners four, posterior pair three-jointed ; basal joint longest, terminal very short, tuberculate. Labial plate not distinct from rest of sternum ; longer than broad, its apex studded with a few minute cuspules. Coxa of pedipalp as long as broad; its anterior distal angle produced; anterior basal angle and whole of inner margin of disc studded with minute cuspules. Patella armed on outside with 2 small distal spines, on inner side with 5 or 6 long spines ; tibia and tarsus armed on both sides with numerous longer and shorter spines. Legs. Tarsus and protarsi i. and ii. armed on outer sides with numerous spines. Tibia i. with one or two minute spines or none on inner side; outer side with a few. Tibia ii. with none on inner side; with numerous spinules on outer side. Patella and tibia iii. with numerous spines on either side and along the anterior margin at apex. Protarsus and tarsus iii. with numerous spinules on either side. Patella iv. with numerous spines on outer side, and 5 or 6 along apical outer margin; protarsus iv. with one or two at apex; tarsus iv. with several on either side. Measurements In millimetres.-Carapace 8 long, 7 broad. Total length, including base of mandibles, 25. Sternum, including labial plate, 7 long, 4 broad. Pedipalp 15 long. Legs i. 16, ii. 16, ill. 16-5, iv. 20 long: all from base of coxa. Two specimens ( $ ) were taken from the sand on the campo closa to Santarem, while digging out a tube of Santaremia pococki; and a little later a colony of about twenty was found on the same campo, nearer the forest. These, all females, had constructed PROC. ZOOL. Soo-1896, No. XLVII. 47 |
