1896.] SPIDBBS FROM THE I<OWER AMAZONS. 759 



from a small tubercle, and with rutous pubescence. Sigilla ])reBent, 

 submarginal. Labium broader than long, clothed with hairs, not 

 cuspidate. Coxa of peclipalp twice as long as broad ; anterior basal 

 angle studded with a central band of minute cusps ; anterior 

 apical angle slightly produced, not cuspidate : on its inner side, 

 about the middle, towards the inner basal angle, is situated a series 

 of 10 stout clavate spines, whose free ends play across the stout 

 separate hairs on the base of the mandible ; these together con- 

 stitute the " lyra " and " pecten " of the stridulating-organ. ' 



Legs short and stout. Femora not spinose ; patellaa i., ii., and 

 iv. not spinose, iii. with one or two spines. Tibise i. and ii. with 

 three spines on inner side towards apex, which is scopulate ; iii. 

 and iv. with a few spines on either side. Protarsi i. and ii. armed 

 beneath with 5 and G or 7 spines respectively ; of iii. and iv. also 

 spinose. Tarsi i. and ii. short, slightly curved, transversely striate 

 above, clothed with a scopula ; iii. and iv. not scopulate. Tarsal 

 claws 3 ; superior pair armed beneath with a double series of 6-7 

 denticles. Tarsal claw of pedipalp with a single row of 5-6 

 denticles. 



Abdomen shorter and broader than in M. rufescetis. MamillfB 

 four : posterior pair shorter than abdomen ; basal joint the longest, 

 second and third equal : anterior pair a little over half the length 

 of the basal joint of the posterior pair, almost as wide apart as 

 their length. 



Qomparative measurements in millimetres. — 5 . Carap. 11 long., 

 10 lat. Abd. 13 long., 9 lat. Cephl. area 7 long. Stern. 6 long., 

 4 lat. Coxa of pedipalp 4-5 long., 2-5 lat. Pedes, long. i. 35 — 

 ii. 33— iii. 31— iv. 38. Artl. i. long. 5— 2-5— 8— 5— 6— 0-3-5. 

 Artl. iv. long. 4-5— 2-5- 8-5— 4— 7— 8-5- 4. Postr. mam. 11 

 long. Arbl. 4 — 3-5 — 3'5. Mandib. 5-5 long; Antr. mam. 2*5 long., 

 2 sept. 



Numerous specimens of the female sex of this handsome species 

 were taken at night as tliey sat in the entrance of the tube of their 

 large " Agelenoid " webs in the forest near Santarem. Many were 

 also taken under logs of wood, where the web and tube assume 

 the character of those of the genus Ccelotes in Europe. 



Mblodeus nigbe, n. sp. (Plate XXXIII. figs. 2, 5.) 



2 . 20 mm. long. Type in coll. Brit. Mus. Nat. Hist. 

 JIab. Santarem, Lower Amazons. 



5 . — Colour. Carapace sepia-brown, clothed with silky rufous 

 pubescence. Abdomen deep brown, clothed with grey hairs ; 

 having on the dorsal area a double series of 5 obliquely transverse 

 rufous bars, the last three often interrupted at their extremities ; 

 breaking up into irregular spots towards the spinners. Legs, 

 sternum, and labium deep brown, clothed with black hairs and dark 

 grey pubescence. Mandibles black, clothed above with rufous 

 pubescence. 



Carapace longer than broad ; cephalic area more than half 

 the length of the carapace. Central fovea deeply recurved; 



