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UNITED STATES. 65 



order 3. DLOMEROSOMATA. 

 family 2. PHALANGIDE^E. 



genus PHALANGIUM. 



Body rounded ; feet elongated ; tarsi with nume- 

 rous joints; mandibles salient much shorter than 

 the body: eyes two, supported on a common tubercle. 



Species. 1 P. *vittatum. Whitish, with a dor- 

 sal fuscous vitta ; terminal joint of the palpi not pec- 

 tinated with spines. 



Inhabits the Southern States. 



Cabinet of the Academy. 



Body whitish, truncated and fuscous behind, a 

 dorsal fuscous vitta from the clypeus to the cloaca 

 and lateral fuscous line, above with dense, obtuse 

 granules, beneath with distant ones ; three pro- 

 foundly impressed lines before the middle, of which 

 the anterior one is semicircular including the ocular 

 tubercle, the intermediate one transverse, and the 

 posterior one recurved ; ocular tubercle prominent, 

 slightly contracted at base, crowned with from four 

 to six more conspicuous, acute spines ; clypeus not 

 elevated, concave beneath the obtuse tip ; feet, se- 

 cond pair about fifteen times as long as the body ; 

 tarsi capillary, articulations not contracted . 



Length, female nearly one-fifth of an inch. Male 

 much smaller. 



The armature of the ocular tubercle is obsolete in 

 the male, and in this sex there are generally two 



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