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Show 0. irf75.] NEW SPECIES OF ERIGONE. 405 spine-like bristles round the fore extremity, on the upperside of the radial joint, forming a kind of chevaux-de-frise ; the genital aperture is of a simple but characteristic form. A n adult male and twelve females were received from Mr. J. II. Emerton, by w h o m they were found at Ipswich, near Boston, Massachusetts, U. S. A., in June 1874. LIST OF SPECIES DESCRIBED. 1. Erigone persimilis, sp. n., 3, p. 394, Plate XLVI. fig. 1. 2. dentigera (Cainbr.), cS, p. 394, Plate XLVI. fig. 2. 3. ornata, sp. n., cS, p. 395, Plate X L V I . fig. 3. 4. pictilis, sp. n., 3 & 2 > P- 396, Plate XLVI. fig. 4. 5. provida, sp. n., $, p. 398, Plate XLVI. fig. 5. 6. pertinens, sp. n., £ & 9, p. 399, Plate XLVI. fig. 6. 7. persoluta, sp. n., 3 & 2 > P- 400> plate XLVI. fig. 7. 8. cornupalpis, sp. n., 3, p. 401, Plate X L V I . fig. 8. 9. multesima, sp. n., 2» P- 402, Plate XLVI. fig. 9. 10. viaria, BL, 3 & 2 - P- 403- 11. ftorens, sp. n., 3 & $ , p. 403, Plate XLVI. fig. 10. EXPLANATION OF PLATE XLVI. Fig. 1. Erigone persimilis 3 • a, part of right palpus, from the outer side; c, palpal organs, very highly magnified; e, radial joint of right palpus, from above and behind. 2. Erigone dentigera (Camb.) 3 • b, part of right palpus, from outer side; d, palpal organs, very highly magnified; /, radial joint of right palpus, from above and behind; g, radial joint of right palpus of Erigone atra, BL, also from above and behind. 3. Erigone ornata 3 • a, Spider in profile; b, caput and falces, from the front; c, upperside of Spider; d, left palpus, from outer side, rather in front; e, ditto, from inner side, also rather in front; /, natural length of Spider. 4. Erigone pictilis cS • a, Spider in profile; b, upperside of cephalothorax and abdomen; c, caput and falces, from the front; d, right palpus, from outer side, rather underneath; e, natural length of Spider. 5. Erigone provida 2 • a, profile of Spider; b, caput and falces, from the front; c, genital aperture ; d, natural length of Spider. 6. Erigone pertinens cS & 2 • a, profile (3); b, caput and falces (3), from the front; c, right palpus (cS), from the front; d, genital aperture ( $ ) ; e, natural length of Spider. 7. Erigone persoluta c$ & 2 • a, profile (3); b, caput and falces (3), from the front; c, left palpus ( 3 )> from the front, on inner side; d, genital aperture ( $ ); e, natural length of Spider. 8. Erigone cornupalpis 3 • a, profile; b, caput and falces, from the front; c, left palpus, from the front; d, right palpus on outer side in front; e, natural length of Spider. 9. Erigone multesima 2 • a, profile; b, caput and falces, from the front; c, genital process; d, ditto, in profile; e, natural length of Spider. 10. Erigone florens 3 & 2- a, profile ( 3 ); b, caput and falces ( J ), from the front; c, left palpus ' (3) on outer side; d, genital aperture ( $ ) ; e, natural length of Spider. |