1873.] GENERA AND SPECIES OF ARANEIDEA. 119 



gitudinal rows of long strong sessile ones occupy the undersides of the 

 tibiae and metatarsi, chiefly of the first two pairs; underneath the tibiae 

 and metatarsi of the fourth pair is a peculiar row of close-set spine-like 

 bristles of uniform length. Each tarsus terminates with three curved 

 claws, the superior ones much the strongest, and pectinated about 

 the middle, the inferior claw simple and strongly bent downwards. 



Palpi moderately long and strong, furnished with hairs and spiny 

 bristles of considerable length, chiefly on the radial and digital joints, 

 the latter also terminating with a curved claw. 



Falces long and strong, profile-line rounded. 



Maxillce and labium (see characters of genus). 



Sternum oval, pointed behind. 



Abdomen elongate-oblong, rather broader before than behind, 

 constricted laterally about the middle and again near the spinners ; 

 its colour is yellow, marked on the upperside, chiefly in the con- 

 strictions, with brownish red. An elongate somewhat diamond-shaped 

 longitudinal marking, sharp-pointed at its hinder extremity and trun- 

 cate before, occupies the central line of the fore half of the upper- 

 side ; this marking is of a dull opaque yellowish brown colour ; and 

 from the slightly angular point on either of its sides is a short line 

 directed backward on each side also ; but nearer the fore extremity of 

 the abdomen is a small punctured dot ; and following the hinder point 

 of the above marking and almost close to it are two small red-brown 

 elongate dots in a transverse line ; the upper surface is very sparingly 

 clothed with short fine hairs ; but underneath near the spinners are 

 some long prominent slender ones. 



Spinners 6 (?), prominent, hut moderate in length and strength ; 

 those of the superior pair are two-jointed, those of the inferior pair 

 rather shorter but stronger and one-jointed. Genital aperture duplex, 

 and with a shining black margin; its form is peculiar (see fig. 3,/, 

 Plate XII.). 



A single adult female example of this Spider was found by Mr. 

 William Rogers (son of Mr. Henry Rogers, of Freshwater, Isle of 

 Wight) on the Rio Grande, Brazil, and was forwarded to me in 

 August 1872. Although presenting a very Thomisiform appearance, 

 it has evidently a closer affinity in some respects to the Lycosides, 

 and in others to the Agelenides ; its nearest congeneric allies are pro- 

 bably the curious genus Podophthalma (F. de B. Capello) and 

 Triclaria (C. Koch) ; but the position of its eyes and other characters 

 preclude its being included in either of those genera, with which, 

 however, I think it must be united in the family Podopthalmides, 

 already formed, in an MS. scheme, to receive Capello' s genus. 



Fam. Thomisides. 



Genus Thomisus (Bl.). 



Thomisus prosper, sp. n. (Plate XIII. fig. 4.) 



Female adult, length 3| lines. 



The cephalothorax of this Spider is of a peculiar form ; and its 

 profile-line forms a strong and equal curve ; when looked at from 



