Genera of the Famihj Attidce. 291 



Patella and tibia I shorter than the cephalothorax, tibia scarcely longer 

 than patella and as ihick; tibia and patella IVa little longer than tibia and 

 patella III; tarsus and nietatardus IV almost as long as pttella and 

 tibia; tibia IV at least a third longer than patella, cylindrical, neither attenu- 

 ated or enlarged at the extremity. Spines short and serial on the tibiae 

 and metatarsi I and II; slender on pairs III and IV; metatarsi III and IV 

 with a whorl of terminal spines; and with two or three small spines to- 

 ward tbe middle; spinnerets very long, particularly the superior ones, cyl- 

 indrical. 



This new genu?^ resembles Mai'pissa, and still more Hyctia, differing from 

 them in having the anterior thighs separated at the base by tlie width of 

 the labium. It is closely related to the genus Icius E. S , but is distin- 

 guished from it by the quadrangle of the eye? being as long as wide and 

 parallel, while in Icius it is plainly wider than long, and a lirtle wider be- 

 hind than in front, by the anterior me liaa eyes being yet more large and 

 prominent, and finally by the presence of several spines (one underneath 

 and two internal lateral) on the posterior metatarsi, besides thi terminal 

 circle. It presents also a certain resemblance to the genus Thya, having 

 the same kind of coloring, the scaly hairs, and the tufts of hairs in the 

 form of horns on the cephalothorax, but it is far removed from it by the 

 form of the cephalothorax and the proportions of the articulations of the 

 two pairs of posterior legs. 



MARPTUSA (Thorell), 1877. Simon. 



Syn.: 1837. Dendryphaiites C. Koch, Uebers. d. Arachn.-Syst., 1, p. 31 

 (ad parttm). 

 1846. Marpissa Id., Die Arachn., XIII, p. 56 (ad partem). 



1869. Marpissus Sim., Monogr. d. Attid., p. 6 (16), 7 (17) (ad par- 



tem). 



1870. Marpessa Thorell, on Europ. Spid., I, p. 218 (ad partem). 



1876. Miirpissa Sni , Arachn. de Fiance, III, p. 23. 



1877. Marptusa Thorell, Ragni Malesi e Papuani, I, p, 221 (ad 



partem). 



1878. " Id., ibid., II, p. 24 (ad partem). 



1878. Marpessa Lebert, Die Spinnen der Schweiz, p. 201 (ad par- 

 tem). 



1878. Marpissa Tacz., Araneides du Perou, Bull. Soc. Imp. d. Nat. 



de Moscou, LIII, 4, p. 217. 



1879. Marptu-a L. Koch, Aracbnide.i Australiens, p. 1092 (ad par- 



tem). 

 1881. *' Thorell, Studi Ragni ]\lalesi e Papuani, III, p. 432 



(ad partem). 

 Cephalothorax long; thoracic part a little dilated, at least a third the 

 longer; cephalic part entirely plane, limited behind by a transverse 

 depression. 



