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Show 1875.] NEW SPECIES O F E R I G O N E . 199 are composed is one at their base on the outer side, rather prominent and obtuse at its end; from near their extremity, on the same side, a strongish pale spine curves downwards and backwards, ending in a slender, curved, filiform point; aud in front of this is another, shorter and stronger, and tapering to a point, but without a filiform ending. The falces are moderately long and strong, and are straight, but inclined backwards towards the labium. The abdomen is oval, moderately convex above, and projects a little over the base of the cephalothorax; it is glossy, black, and sparingly clothed with short hairs. A single adult male of this very distinct Erigone was received from M. Simon, by whom it was found in France (Col de Natoia, between Embrun and Barcelonnette). It is allied to Erigone ( Walckenaera) humilis (Blackw.), E. affinitata, Cambr., and E. crassiceps (Westr.) = E. bucula Ch. Koch). The last two species may be distinguished from E. vaporariorum by their more elevated caput; while E. humilis has a broader and more obtuse termination to the caput, and is without the transverse depression between the ocular area and the occiput, and the backward-directed hairs from this area, both of which are strongly characteristic of the present species. ERIGONE CORNICULANS, sp. n. (Plate XXVII. fig. 9.) Adult male, length 13 line, rather more than 2| millimetres. The cephalothorax of this species, which is very nearly allied to E. monoceros (Wid.), is yellow, the caput, as well as the normal indentations, being slightly suffused with dusky brown; tbe fore part of the caput is slightly but gradually elevated, and a little prominent ; and from the centre of the ocular area there rises a distinct horn-like eminence; this eminence is slightly curved, projects forwards, and is of a tapering form, blunt at the extremity, or of a somewhat subconical shape ; its fore side and summit are furnished with some short, curved, clavate, prominent hairs, and some ordinary ones issue from its hinder part. The eyes are of tolerable size, and seated in four pairs round the eminence on the fore part of the caput, those of each pair respectively being contiguous to each other. The four pairs describe very nearly a circle; but the interval between each lateral pair and the hinder pair is greater than that between the lateral and front pairs; the former interval is equal to the diameter of one of the hinder pair of eyes, the latter interval to the diameter of one of the front pair. The legs are long and slender, their relative length being 4, 1, 2, 3 ; there appeared to be, however, but little difference between those of the first and second pairs; they are similar in colour to the cephalothorax, and are furnished with inconspicuous hairs and fine bristles. The palpi are slender and of moderate length ; their colour is pale yellow; the digital joint, however, is suffused with brown, and the radial joint is margined with black-brown on its inside: the cubital joint is clavate, or enlarges gradually from its hinder to its fore extremity : the radial joint-is shorter, but stronger, than the cubital, and |