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Show 1880.] OF THE GENUS ARGYRODES. 327 The palpi are short, of a blackish colour; and each terminates with a rather long, slender, slightly-curved claw. A single example of this Spider, which is nearly allied to Argyrodes antipodiana, Cambr., was received from Parana, South America, where it was found some years ago by Mr. Henry Rogers. ARGYRODES ANTIPODIANA, sp. n. Adult female, length ^ of an inch. This Spider is very nearly allied to Argyrodes argentata, Cambr., resembling it closely in general appearance, colours, and markings. In all the examples, however, that I have seen, the longitudinal black line on the upperside of the abdomen is stronger, and runs quite through to the apex of the hinder part; and in some examples there is a tendency to form one or more lateral oblique stripes running from the angular points of the upper margin of the underside towards the upperside ; the apex of the abdomen is also more obtuse. In respect of the form of the abdomen, this species resembles Argyrodes epeira, Sim., very closely ; and the variety of markings just now mentioned is also very like the less darkly marked varieties of that species ; there is, however, in every one of the numerous females I have examined of A. epeirce, a transverse dark bar or slender stripe on the upperside of the abdomen, a little way in front of the apex : and the central longitudinal stripe is always strong, but never runs through to the apex. The genital aperture, although of the same general character, differs, though slightly, in all the three Spiders now compared ; and I feel but little doubt that, when the male of A. antipodiana is discovered, it will be found that the form of the cephalothorax also differs in that sex from both the others mentioned. A. epeirce is also apparently a larger Spider than the present one. I have received examples of this Spider from Sydney, N. S. W . (from Mr. H. II. B. Bradley), and from New Zealand from Capt. F. W. Hutton. ARGYRODES LUGENS, sp. n. (Plate XXVIII. figs. 2 a', b', c'.) Adult female, length 1| line. This Spider is nearly allied to Argyrodes epeirce, Sim ; the abdomen, however, is higher and sharper at the apex, and its pattern is quite different. In one respect only there is a similar portion of the pattern-namely, in the constant presence of a transverse black bar on the upperside, a little way in front of the apex; this bar is generally broader than in A. epeirce; and in regard to the colouring of the abdomen, the dark portions are nearly or quite jet-black, whereas in A. epeira they are more of a very deep red-brown hue. The present Spider is very variable in respect of its pattern, varying from an almost uniform brilliant silvery hue, marked only with a central longitudinal black stripe on the upperside, terminating in the transverse bar above noticed, and a black underside boldly dentated on its upper margins, to a uniform jet-black ground marked on the upperside with two parallel longitudinal silver stripes.or bands, |