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Show 424 MR. A. G. BUTLER ON THE GENUS ACROSOMA. [Apr. 1, at widest part 2\ lines; entire length 2§ lines; anterior spines \ of a line; posterior spines 1\ line. Colours. Cephalothorax, falces, sternum, maxillae, and legs reddish castaneous; labium shining ochraceous ; abdomen above olivaceous, encircled with orange and covered with red impressed punctures, about thirty in number; anterior spines orange, posterior dark castaneous ; ventral surface olivaceous, with six large orange spots arranged in a nearly equilateral triangle on either side ; spines as above. Jamaica. ' Allied to the preceding species, and to A. guerinii of Keyserling. 25. ACROSOMA GUERINII. Acrosoma guerinii, Keyserling, Sitzungsber. der Isis zu Dresden, p. 79, pl. 2. f. 1 2 (1863, edit. 1864). " Bogota " (Keyserling). 26. ACROSOMA SAGITTATUM. Plectana sagittata, Walckenaer, Apt. ii. p. 174. n. 38 (1837); Abbot, Georgian Spiders, f. 50. Georgia. B.M. 27. ACROSOMA CRASSISPINUM. Acrosoma crassispinum, Koch, Arachn. iii. p. 55, pl. 92. f. 209 (1836). "America" (Koch). ? B.M. 28. ACROSOMA GLADIOLA. Plectana gladiola, Walckenaer, Apt. ii. p. 182. n. 51 (1837-39). Acrosoma aculeatum, Koch (nee Fabr.), Arachn. iii. p. 58, pl. 93. f. 211 (1836). Venezuela (Birschell). B.M. 29. ACROSOMA PLANUM. Acrosoma planum, Koch, Arachn. iii. p. 81, pl. 99. f. 228 (1836). Colombia (Goudot). B.M. 30. ACROSOMA ACUTO-SPINUM. Acrosoma acuto-spinum, Keyserling, Sitzungsber. der Isis zu Dresden, p. 69, pl. 2. f. 2. "Bogota" (Keyserling). Probably not distinct from Acrosoma planum. 31. ACROSOMA TRIANGULARE. Acrosoma triangulare, Koch, Arachn. iii. p. 78, pl. 99. f. 226 (1836). Var. 1 Acrosoma excavatum, Koch, I. c. p. 80, pl. 99. f. 228 (1836). " Brazils " (Koch) ; sp. ead.? Ecuador (Buckley). B.M. I doubt whether A. excavatum is identical with A. triangulare, although Walckenaer has unhesitatingly called it a yellow variety. |