Genera of the Familij Attidce. 29 



row. The falces are somewhat longer and in the only example that I have 

 seen somewhat hidden under the palpus, so that the form is only imper- 

 fectly to be seen. The legs differ essentially from all the genera of the 

 Salticidae, in that the tarsal joint is very short in proportion to the meta- 

 tarsal. The legs are somewhat robust, the first and fourth pairs the longest 

 and about equal in length, the second and third pairs growing somewhat 

 shorter by degrees. The middle spinnerets are long, decidedly longer than 

 usual, the others only half as long; in this the genus unites with Cocalus, 

 to which altogether, it bears soikb likeness. 



BCETHUS Thorell, 1878. 



Sy7i.: 1878. "Roptluis Thorell, Studi sui Ragni Malesi ePapuani, II, p. 220. 

 1881. " ID., ibid.. III., p. 431. 



Cephalothorax short, high, sloping steeply in front, the cephalic part not 

 nanower anteriorly. 



Clypeus about i as high as the middle eyes. 



Sternum much wider than the coxae. 



Eyes: quadrangle large, occupying more than f (not indeed half) of the 

 length of the cephalothorax, a little wider than long, wider i i front 

 t.'ian behind, where it is only a little narrower than the cephalotho- 

 rax at that place. The anterior row of eyes, which is pi linly visible 

 when the cephalo horax is looked at from above, is only slightly 

 curved upward; the middle anterior eye? are large, very promineat 

 and sub-touching, the lateral much smaller, and a little larger than 

 the posterior eye-, which are placed more than their own diameter 

 higlier than the lateral eyes, and are a little further from the lateral 

 borders than from each other. Eyes of the second row rather large, 

 placed almost in the middle between the posterior and the lateral 

 eyes, and as high as the latter. 



Falces as usual, sub- vertical. 



Maxillae long and narrow, more than twice as 1 )ng a^ the lip. Lip almost 

 equally long and wide, w.dely truncated at extremity. 



Legs moderately long, rather slender, 4, 1, 2, 3. First pair a little more ro- 

 bust than the others, tibiae and metatarsi with a few spines under- 

 neath, which are Jong and ad presse i; tibia but little longer than 

 metatarsus. Tibia with patella of fourth, longer than tibia with 

 patella of third. Posterior metatarsi with spines throughout their 

 length. The two tarsal cL-^iws moderate, not curved, slightly con- 

 vex on the back, pectinated with many short teeth. Scopula dilated 

 a little at the apex. 



Abdomen long, a little flattened. 



Spinnerets the superior, rather long, with two joints, Avhich are conical, 

 and at least as long as wide, the inferior ones sub-conical thicker 

 and shorter than the superior. 



Type: B. spinimanus. 



