100 



Li/cosa lenta to be printed instead of the original drawing of 

 this species, which was probably lost ; and as soon as they were 

 informed of the error, they caused an imperfect delineation of 

 this species to be substituted, which may be seen on Plate v, 

 along with some representations of crystals of Zircon, published 

 by Dr. G. Troost. The palpi of the male of this spider are 

 very complicated, as may be seen by the drawing. The colors 

 vary much. [The article from the Philadelphia Journal will 

 be found further on.] 



On the 28th of February, I observed a male specimen of 

 this species in a dark corner, apparently devouring another 

 spider. On moving them with a straw I discovered that the 

 other was a female of the same species, and not dead, but with 

 its legs closely folded on its body, and perfectly motionless. 

 One of the palpi of the male was buried in the vulva of the 

 female, and could not be extricated by the efforts which he 

 made to avoid my intruding straw. I threw them on the 

 ground and had ceased to watch them, when suddenly I saw 

 the female escaping from him, apparently in great terror. In 

 the meanwhile, the male, from whose cheliceres she had es- 

 caped, had seized a small bit of stick as a substitute, and ran 

 about with ludicrous haste, seemingly out of his senses for 

 some time. This fact may prove that the female of spiders is 

 not always the tyrant and oppressor of the other sex. 



Habitat. The United States. 



[PI. 18, fig. 110, palpus of $ , a, upper hook; b, lower hook 

 and its membranous meatus above ; c, middle sphenoidal piece ; 

 d, third hook corresponding to the fourth hook i; e, bristle 

 which is usually curled between the first and second hook ; /, 

 base ; i, fourth hook. The upper and lower hooks are parallel, 

 like two fingers ; whilst the third and fourth are opposed to 

 them ; all forming a compound hook which must retain the 

 female organs whilst the little bristle, e, stirs and conveys the 

 sperma. That fluid flows from an orifice at the base of the 

 lower hook, between it and the membrane situated on its upper 

 part. The middle piece articulates with all the other parts 



