1896.] SPIDBES FROM THE LOWEE AMAZONS. 755 



of the type female being furnished with a dense scopula. The lyra 

 also difiers considerably in character from those of the three species 

 here described. 



Besides these forms of Biplurina, of which the females (and 

 doubtless the males as well) possess the 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 macritra (0. K.) I cannot say, 

 but should not be surprised if such were the ease. 



Por the present I iorm a genus Neodiplura ' for the reception of 

 those which possess no stridulating-oigans. Of B. coiisini, 5 , 

 Sim., of which the labium is spinulose ; I), aquatorialis, Auss., j , 

 closely allied to D. coiisini (sec. Simon) ; D. longicauda, Auss., $ , 

 with spinners longer tlian the abdomen ; and D. rogenlioferi, 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 spinning -martiillce as long as abdomen ; terminal segment 

 the longest. Legs longer, more slender. Fang-groove with a single 



raore lightly scopiilate. First pair of legs a little longer than fourth. Tarsal 

 claws 3. Superiors armed with a double series of denticles. Fang- 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 claviforms. Base of mandible furnished with seven or eight stout spini- 

 form hairs, incrassate at base, the first five isolated. These form the lyra and 

 pecten of the stridulating-organs. 



' NEODirLURA, 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 sette ; the latter with spines amidst the scopula;. 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. 



Neodiplora JELSKii, n.sp. (c? 5). -ffo*. Peru. Type e coll. W. Kulozynski, 

 Cracow. (Plate XXXV. figs. 5, 10, 11, 14.) 



Colour. Carapace mahogany-brown, clothed with short silky yeUow 

 pubescence ; abdomen brown, clothed with long silky yellow hairs, with a 

 double dorsal series of 6 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-tuiuulus 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 oontaot with 



