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Show 742 . M R . F. O. P I C K A R D C A M B R I D G E O N [June 16 stiff, fiery-red hairs, especially the three terminal segments. Tarsi of all four pairs tipped with a broad bar of rufous hairs. Underside of tarsi of pedipalp, tarsi and protarsi of first and second pairs of legs, except extreme base of protarsi, tarsi and half the protarsi of third and the apex of protarsus of fourth pairs, furnished with a thick scopula. Tarsi of all four pairs and of pedipalp broad, spatuliform. Abdomen clothed on the sides with bright rufous, stiff and long hairs, these becoming obsolete towards the apex of abdomen above, disclosing an undercovering of short black hairs. L'nderside clothed with black hairs. Carapace longer than broad, in proportion of 20:18 ; flat, not gibbous behind eye-tumulus. Ege-tumulus twice as long as broad, more or less prominent (variable). Anterior centrals one diameter apart, distant from anterior laterals a space equal to transverse diameter of latter. Anterior row only slightly pro-curved1. Central fovea deep, recurved. Fang-groove armed with a single row of short stout conical teeth, both margins fringed with long hairs ; floor of groove studded with minute granules. Sternum with three pairs of sigilla visible-1st at base of labial plate, 2nd obsolete, 3rd marginal, 4th submarginal. Labium quadrate, its distal third entirely studded with minute cuspules. Coxa of pedipalp slightly more than twice its breadth; its inner basal angle studded with minute cuspules, as also is the basal inner disc, only more scattered; anterior inner angle produced, obtusely conical. Legs of fourth pair longer than those of first. Tarsus of pedipalp with one, of legs i., ii., in., and iv. with two small stout hooked claws, their inner edges plain, not armed with denticles. Spinning mamillce four; posterior pair trisegmental, second segment shortest. The whole three segments taken together one-third longer than width of sternum. This is the form which is most abundant on the Amazons, occurring at Para, Breves, Gurupa, Monte Alegre, Obydos, Santarem, & c , in almost any number and in all stages of development. Amongst the foliage the little yellow-legged immature of this species with black tarsi, the next stage with black oblique stripes on the abdomen, and many others, were in abundance. The adults constructed their tubular retreat in almost any locality which offered a more or less vacant cylindrical space. Of the hollow stumps of the Assai palm in the neighbourhood of Para, which had been sawn off about 3 ft. from the ground, almost every oue nad its tenant. Further up the river, one found them in the folded leaves of bananas, and at Obydos and Santarem abundant in the half-grown condition in the hollow centre of the pineapple plant. Sometimes, too, their loose white irregular cylinder of 1 In scarcely a single specimen are the eye-measurements the same, so inconstant and unreliable are characters drawn from the proportional size and separation of these organs. In some specimens the anterior row is much more strongly procurved, while the anterior laterals are distant from the centrals a space equal to the diameter of the latter. |
