608 BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



Philoscia couchi Kinahan, from which it is said to differ (1) in having 

 the second antennae longer and more slender; (2) in having the uro- 

 poda longer and more slender, and (3) in having for eyes small spots 

 of pigment with slight rudiments of ocelli, while in P. couchi the eyes 

 seem to have entirely disappeared. Dahl likewise points out that 

 these differences also exist between Ligia baudiniana (hirtitarsis) and 

 Ligia oceanica. He considers that in both cases the Philoscia form 

 has arisen independently from the Ligia form. 



PHILOSCIA SPINOSA Say. 



Philoscia spinosa SAY, Jour. Acad. Nat. Sci. Phila., I, 1818, pp. 429-430. 

 UNDERWOOD, Bull. 111. State Lab. Nat. Hist, II, 1886, p. 361. RICHARDSON, 

 American Naturalist, XXXIV, 1900, p. 305; Proc. U. S. Nat. Mus., XXIII, 

 1901, p. 565. 



Locality. Savannah, Georgia. 



" Brown, oblong-oval, with numerous spines above; feet armed with 

 short setse beneath. 



" Inhabits Georgia. 



" Cabinet of the academy. 



" Body brown, elongate -oval, armed with numerous spine-like tuber- 

 cles; sixth and seventh segments produced on each side behind, acute, 

 the latter attaining the base of the fifth succeeding joint; abdominal 

 and caudal segments somewhat glabrous, terminal segment surpassing 

 the first joint of the lateral styles; antenna? rough and subspinose 

 before, terminal joint glabrous, pale; feet beneath armed with short 

 distant setae. 



"Length nearly one-fifth of an inch. 



"Under stones, old wood, etc., in moist situations near Savannah, 

 Georgia. " SAY. 



PHILOSCIA NIGRICANS Budde-Lund. 



Philoscia nigricans BUDDE-LUND, Crust. Isop. Terrestria, 1885, pp. 210-211. 

 RICHARDSON, American Naturalist, XXXIV, 1900, p. 305; Proc. U. S. Nat. 

 Mus., .XXIII, 1901, p. 565. 



Locality. Biloxi, Mississippi. 



Body oblong-oval, rather convex, smooth, slightly covered with a 

 few dots. 



Second pair of antennas lost in the specimen. 



Frontal margin straight; epistome with a median transverse line. 



Abdomen abruptly narrower than the thorax; epimera distant. The 

 last segment of the abdomen short, subtriangular, with the sides 

 straight or slightly incurved; apex obtuse, sulcate above. 



Jour. Acad. Nat. Sci. Phila., 1. 1818, pp. 429-430. 



