OCR Text |
Show 572 REV. O. P. CAMBRIDGE ON EGYPTIAN SPIDERS. [June 20, Gen. ERIGONE, Sav. ERIGONE SPINOSA. Erigone spinosa, Cambr. Spid. Palest. & Syr. P. Z. S. 1872, p. 292, pl. xiii. fig. 12. Adult males of this very distinct species were found running on the metals and permanent way of the railroad near Cairo and Alexandria. ERIGONE ALEXANDRINA. Erigone alexandrina, Cambr. P. Z. S. 1872, p. 755, pl. Ixv. fig. 11. Both sexes of this minute Spider were found on rushes and other plants growing in a marsh near Alexandria. Gen. LINYPHIA, Latr. L I N Y P H I A E X T R I C A T A , sp. n. (Plate LIX. fig. 7.) Adult male, length 1^ line. This Spider, which is allied to L. nigrina, Westr., resembles it in form, general appearance, and colours. The cephalothorax is of a dusky yellow-brown colour, with indistinct radiating brown lines following the normal grooves and indentations. The height of the clypeus rather exceeds half that of the facial space ; and the profile line of the cephalothorax (including the hinder slope) forms a slightly curved line. The eyes are very nearly equal in size and in two equally curved lines, the curves directed away from each other, thus forming a transverse oval figure ; those of the hinder row are equidistant from each other, those of the fore central pair (which seem to be larger than the hind centrals) being near together but not contiguous to each other, the interval dividing them being a little less than that which separates each from the fore lateral eye on its side. The line formed by the fore centrals is a little shorter than that formed by the hind centrals ; and each of the former is separated by an interval of its own diameter from the latter nearest to it; those of each lateral pair are seated, slightly obliquely and contiguously to each other, on a tubercle. The legs are long, slender, their relative length 1, 2, 4, 3, of a pale yellowish hue tinged with brown, furnished sparingly with hairs and a few short fine spines. The palpi are moderately long, slender, and of a similar colour to the legs ; the cubital joint is short ; the radial equally short, but produced at its fore extremity on the upperside, the termination being rather broader than the joint and evenly rounded ; the digital joint is large, with a slight (and from some points of view angular) prominence at its base on the inner side, and a large prominent lobe on its outer side about the middle. The palpal organs are highly developed and complex: among the corneous processes of which they are made up, the normal curved one at their base is of large size and peculiarly characteristic form ; sometimes it lies in close proximity |