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Show 1876.] REV. O. P. CAMBRIDGE ON EGYPTIAN SPIDERS. 591 ARTANES LUGENS, sp. n. An immature female of this Spider is rather smaller than those just described of A. bigibba, and, although strikingly similar in general form, colouring, and structure, differs from that species in (apparently) the larger size of the eyes of the hinder row ; the legs, also, are speckled with dark brown or blackish spots, the longitudinal dark stripe on the fore femora being absent: the abdomen also has scarcely any trace of the two gibbosities noticed in that species; the colour of the upperside is a clear greyish white, with a large oblong somewhat rectangular black area reaching from the fore margin to about two thirds of the way to the spinners; this black figure is rather constricted in the middle, and is closely followed towards the spinners by a transverse, slightly angular stripe, or chevron, close behind which is a single central black spot; on either side, close to the spinners, is a short black marginal stripe ; the underside is unicolorous, and of a dull greyish white hue. A single example of this Spider was found near Alexandria. Future researches alone will prove whether or not it is only an abnormally coloured example of A. bigibba ; at present I consider it to be of a distinct though nearly allied species. Gen. THANATUS, C. .Koch. THANATUS ALBINI. Philodromus albini, Sav. et Aud., Egypte, pl. vi. fig. 4. Adult examples of both sexes of this Spider were found in various parts of Egypt, among low herbage and running on bare spots. THANATUS LINEATIPES, sp. n. Adult female, length 3 lines. This Spider belongs to the group typified by T. oblongus, upon which M. Simon has founded a separate genus, Tibellus. So far as I can see, the chief, if not the only, valid distinction from Thanatus is the elongate narrow abdomen-which seems scarcely enough for the construction of a new genus, although a convenient character for the separation of a group within the genus Thanatus. The whole of the fore part of the present Spider is pale yellow. The legs are furnished with a few fine spines ; and the femora of the first and second pairs are thinly spotted with minute blackish specks ; the tibise and metatarsi of the first, second, and third pairs are marked on the hinder sides with a single longitudinal black line, while the same joints of the fourth pair have a black line along both the fore and hinder sides. The palpi are immaculate. The abdomen is of an elongate oval form, but not so narrow as that of T. oblongus; it is of a pale yellowish colour, closely and uniformly covered with yellow-white cretaceous spots, having only a pale dull-coloured elongate tapering central marking along the middle of the fore half on the upperside; from this marking there issue several fine oblique lines of a similar colour. The relative length of |
