TliAP.DOOn SPIDERS. 275 



examination, however, of the relative size and position 

 of the eyes in a series of examples, lowers one's esti- 

 mation of the ahsolute value of this character in the 

 determination of the species of Ncmesia ; still it is a 

 specific character not by any means to be overlooked, 

 though to be used guardedly, and often with great 

 reservation. 



In regard to other characters and general description 

 there seems but little to add to tlie description given 

 (I.e. suprci), except that the labium has no denticula- 

 tions at its apex and the outer sides of the genual 

 joints of the third pair of legs are generally without 

 spines. Occasionally (in one example out of sixteen) 

 there is a single spine on this joint, of either the right 

 or left leg. In this character, however (differing from 

 several others described below), the Montpellier spider 

 agrees with that from Mentone. 



In both spiders, the fangs of the falces are (in some 

 instances at least) denticulated. Also in regard to the 

 relative lengths of the legs, like those of the Mont- 

 pellier spider, the second and third pairs of the 

 Mentone species are not constant in their relative 

 proportions, though the differences either way are 

 very slight, and there is often no difference whatever. 



The nest and habits of the two species appear to be 

 nearly, if not quite, similar. 



In naming the present species (at the suggestion of 

 M. Eugene Simon) the writer of these descriptions 

 gladly testifies to his appreciation of the great value 

 attaching to Mr. Traherne Moggridge's investigations 

 of the habits of the closely-allied species of this very 

 difficult, though most interesting group of spiders. 



M. Eugene Simon {Ami. Soc. Eni. Fr. 1S73, Bull, c), 



