1818.] OF THE UNITED STATES. 429 



Genus PHILOSCIA. Latr. 



Caudal styles four, simple, saliant, lateral ones biar- 

 ticulate; antenna:, exteriores eight-jointed, interiores ob- 

 solete; tq,il abruptly narrower than the body. 



SPECIES 



1. P. vitfata^. Fuscous, glabrous, margin and two 

 broad vittae cinereous. 



Inhabits the United States, common. 



Cabinet of the Academy. 



Head above transversely oval; eyes longitudinally 

 oval, granulate; anterina with minute distant hairs, ulti- 

 mate joi»t tipped with a seta; body^ first segment rather 

 longer than the others, which are nearly equal; tail^ seg- 

 ments subequal, terminal one rounded at tip, not longer 

 than the preceding one, and attaining the tip of the first 

 joint of the external styles, intermediate styles setaceous 

 at tip, rather shorter than the external ones; head, body^ 

 and tail with the margin and two broad vittse cinereous. 



Length one-fifth of an inch. 



Very common under stones, wood, &c. in moist si- 

 tuations. 



2. P. spinosa^. Brown, oblong-oval, with numerous 

 spines above; Jeet armed with short set^e beneath. 



Inhabits Georgia, 



Cabinet of the Academy. 



Body brown, elongate-oval, armed with numerous 

 spine-like tubercles; sixth and seventh segments produ- 

 ced on each side behind, acute, the latter attaining the 

 base of the fifth succcedmg joint; abdominal and caudal 



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