| OCR Text |
Show 1873.] SPIDERS FROM ST. HELENA. 223 The digital joint is rather small and of a narrow-oval form, convex side being turned inwards. From its base springs a rather long, tapering, almost straight, and nearly perpendicular horn or apophysis, its extremity being bluntish-pointed and black; the length of this horn about equals half the length of the digital joint, but exceeds its breadth. The palpal organs are well developed and prominent, consisting of a somewhat oval, convex, corneous lobe, with a detached curved process at the base on the outer side, and an obtuse one at the extremity projecting forwards just beneath the fore extremity of the digital joint; and springing from it is a small curved sharp-pointed spine. A remarkable similarity in the form and structure of the palpi and palpal organs exists between M. digna and M.(Tetragnatha) decorata (Bl.), figured, Linn. Soc. Journ. x. pl. 13. figs. 66, 67 ; but in other respects the species are totally distinct. Fam. ULOBORIDES. Genus ULOBORUS. ULOBORUS WILLIAMSII. Orithyia williamsii, Bl. Ann. Nat. Hist., Nov. 1858. Adult females of this Spider were contained in Mr. Melliss's last two collections from St. Helena. Fam. THOMISIDES. Genus XYSTICUS (Koch). XYSTICUS GRAMMICUS. Xysticus grammicus, Koch, Die Arachn. Bd. iv. p. 57, tab. 124. fig. 285. Adult males and numerous females were received from St. Helena; some of the latter sex were accompanied by their nests and egg-cocoons, which last were sewn up in a leaf whose edges were brought together, forming a neat little bag. The male is much smaller and darker-coloured than the female. Fam. LYCOSIDES. Genus LYCOSA. LYCOSA (TROCHOSA) DOLOSA, sp. n. Adult female, length 7\ lines. The cephalothorax of this fine species is broad-oval, truncate before, constricted laterally forwards ; the caput is roundly convex, and the profile line from the thoracic junction to the middle row of eyes is rather arched ; it is of a dark reddish yellow-brown colour, the caput being the darkest; from between the hinder pair of eyes three lines of pale hairs run backwards to the thoracic junction, the two lateral ones of these lines enclose a pointed oval space which is |
