Superfamily Argiopoidea 



Tibellus oblongus (T. ob-lon'gus). — This species is a little 

 less slender than the preceding and the legs are comparatively 

 shorter, the second legs being not quite five times as long as the 

 cephalothorax. The space between the posterior median eyes 

 is only a little less than that between one of them and the posterior 

 lateral eye of the same side. In the palpus of the male, the short 

 embolus is nearly straight. 



This species is widely distributed; and like the preceding 

 is common on bushes and on grass. 



Family SELENOPIDiE (Sel-e-nop'i-dae) 



The Selenopidae includes a single genus, Selenops, of which 

 about a dozen species are known. These are tropical spiders 

 of large or of medium size; and they do not occur naturally within 

 the limits of the United States, except perhaps in the extreme 

 South. A single individual of Selenops aissus has been reported 

 from Tortugas Island, Fla.; but this may have been introduced. 

 As specimens of the same species have been taken at Ithaca, 

 N. Y., in a room where bananas were stored, we infer that there 

 is a chance of its being found wherever tropical fruit is taken, 

 and include an account of it here. 



Genus SELENOPS (Se-le'nops) 



The members of this genus resemble the crab-spiders in 

 the attitude of their legs. They are of large or of medium size 

 and are remarkable for the extreme flatness of the body. They 

 can be easily recognized by the arrangenemt of the eyes, which 

 is unusual in that the posterior median eyes have moved to a 

 position in front of the posterior lateral eyes and in line with the 

 four anterior eyes; the anterior row may be said, therefore, to 

 to consist of six eyes. The following is the only species that has 

 been recorded from the United States. 



Selenops aissus (S. a-is'sus). — The adult female measures 

 one half inch in length and nearly one fourth inch in width. 

 The cephalothorax is reddish brown, the abdomen brownish 

 yellow flecked with dark specks; the lateral and the hind margins 

 of the abdomen are dark. When viewed from above only six 

 eyes are visible (Fig. 621); these are the four anterior eyes, which 



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