OCR Text |
Show 1896.] SPIDERS PROM THE LOWER AMAZONS. 755 of the type female being furnished with a dense scopula. The lyra also differs considerably in character from those of the three species here described. Besides these forms of Diplurlna, of which the females (and doubtless the males as well) possess tbe lyra and pecten, there are before me others which, being otherwise closely allied, possess no lyra or pecten. A male adult and a female, apparently immature, from Peru, present characters which, in conjunction with the absence of stridulating-organs would seem to warrant the formation of another genus for their reception. Whether these will eventually prove to be congeneric with Diplura macrura (C. K.) I cannot say, but should not be surprised if such were the case. For the present I form a genus Neodiplura 1 for the reception of those which possess no stridulating-organs. Of D. couslnl, 2 > Sim., of which the labium is spinulose; D. cequator lolls, Auss., 2 •> closely allied to D. couslnl (sec. Simon) ; D. longicauda, Auss., § , with spinners longer than the abdomen ; and D. rogenhoferi, Auss., 5 , I cannot speak with any certainty. The characters given would apply fairly well, from a generic point of view, to any of the Dipluriform spiders. HARMONICON, gen. nov. Posterior splnning-mamillce as long as abdomen ; terminal segment the longest. Legs longer, more slender. Fang-groove with a single more lightly scopulate. First pair of legs a little longer than fourth. Tarsal claws 3. Superiors armed with a double series of denticles. Pang-groove armed on the outer side with a single row of teeth ; floor of groove towards base studded with cuspules. Coxa of pedipalp furnished on inner side with 17 long claviform spines and a thick pad of numberless smaller spines, interspersed with claviforins. Base of mandible furnished with seven or eight stout spiniform hairs, incrassate at base, the first five isolated. These form the lyra and pecten of the stridulating-organs. 1 NEODIPLURA, gen. nov. No lyra or pecten on coxa of pedipalp and base of mandibles respectively. Tarsi and protarsi i. and ii. fairly densely and entirely scopulate; the former with no central series of setae; the latter with spines amidst the scopulse. Tarsi iii. and iv. densely and entirely, protarsi iii. and iv. slightly and towards apex, scopulate. Tarsal claws 3 ; superiors armed with a double series of denticles. NEODIPLURA JELSKII, n. sp. (tf $). Hab. Peru. Type e coll. W. Kulczynski, Cracow. (Plate X X X V . figs. 5, 10, 11, 14.) Colour. Carapace mahogany-brown, clothed with short silky yellow pubescence; abdomen brown, clothed with long silky yellow hairs, with a double dorsal series of 5 or 6 short, transverse, dull orange bars. Sternum and legs brown, with short silky yellow hairs. Carapace a little longer than broad, flat, slightly raised behind eye-tumulus, with a shallow depression on either side and a recurved groove behind eyes. Central fovea small and recurved. Eye-tumulus prominent, diameter of anterior centrals larger than the axis of laterals; less than one diameter apart; less than half from laterals. Anterior row almost straight, slightly procurved. Posterior centrals smaller than-posterior laterals,.and almost in contact with |