756 , ME. p. O. PIOKAllD OAMBMDGB OK [June 16, 



row of teeth on the outer margin and a row of fine capsules in centre 

 of fang-yroove. Tarsi i. and ii. distinctly scopulate, ivith central 

 series of long setce. Coxa of pedipalp furnished with a lyra formed 

 of 5 long, curved, claviform spines. Base of mandible with 4 isolated, 

 incrassate bristles at the base. Diameter of anterior central eyes dis- 

 tinctly less than a.vis of laterals, 



Haemonicon htjfesoens, d. sp. (Plate XXXIII. figs. 3 & 6, 

 and Plate XXXV. figs. 2 & 3.) 



?. 27 mm. long. Type in coll. Brit. Mub. Nat. Hist. 

 Hab. Santarem, Lower Amazons. 



5 . — Colour. Carapace dull orange, almost destitute of hairs and 

 pubescence, jibdomen rufous, clothed with fine black hairs, more 

 numerous in frout ; spinners rufous. Sternum and legs dull 

 yellowish with brown shading, clothed with spines and short black 

 hairs. Mandibles dull orange, clothed with black hairs. 



Carapace longer than broad. Cephalic area two-thirds the 

 length of carapace. Central fovea only slightly recurved. Thoracic 

 strisB well-marked. Ocidar tmmdus slightly raised above the 

 level of the carapace, thi'ee times as long transversely as wide. 

 Anterior centrals circular, three-fourths of a diameter apart, less 



them. Sternum longer than broad. Sigilla well-marked : 1st pair very large at 

 base of labial plate; 2iid submarginal ; 3rd remote; 4th more remote; each 

 opposite the coxa of one pair of legs. Labium broader than long, semicircular ; 

 apex not epinulose. Coxa of pedipalp twice its breadth, anterior distal angle 

 not produced, anterior basal angle studded with numerous cuspules. Legs long, 

 4, 1, 2, 3. Tibiae and protarsi i. and ii. spinose beneath ; iii. and iv. above 

 and below. Tibia i. with a stout spur-like spine on outer side at apex ; pro- 

 tarsus i. with a stout tubercle on outer side towards the base. Tarsi slender, 

 flexuose, much curved ; protarsus i. thickly recurved. Tarsal claws 3 ; superiors 

 armed with a double series of denticles. Posterior spinners shorter than 

 abdomen, trieegmental, segments subequal. Anterior spinners within two 

 diameters of each other. I'edipalp : tibia with long spines beneath, tarsus very 

 short, bulb short piriform, its ajjex prolonged into a short, stout, simple, slightly 

 curving spine, directed outwards and backwards. Faiig-groove with a single 

 row of teeth on the outer margin. 



cf. — Carapace 11 mm. long., 95 broad. Abdomen 12-5 mm. long. Man- 

 dibles 5 mm. long. Post, spinners 9 mm. long. Legs, i. 55 mm. ; ii. 50 mm. ; 

 iii. 45 mm. ; iv. 53 mm. 



g (immature). — Colours and general characters the same as of the c?. 

 Diameter of anterior central eyes less than axis of laterals, thus differing from 

 the male, the difference being possibly due to immaturity. 



These specimens were kindly submitted to me by my friend Prof. Kulczynski, 

 of Oracow. They were taken by Dr. Constantino Jelski in Peru. 



A. Coxa of pedipalp and base of mandible with stridu- 



lating-organs. 



1. Tarsal seopula without central series of long setse ... Trechona, 0. K 



2. Tarsal seopula with centriil series of long setie. 



a. Legs long, slender. Terminal segment of posterior 



pair of spinners longer than either of the basals . Harmonicon, n. g. 



b. Legs short, stout. All three segments of posterior 



pair of spinners subequal Melodeits, n. g. 



B. Ooia of pedipalp and base of mandible without stridu- 



Uting-orgaDB Neodiplura, n. g. 



