450 



ONISCID^,. 



ISOPODA. 



N0RMAL1A. 



ONISCIDJU. 



PHILOSCIA MUSCORUM. 



Specific character. Smooth, shining ; front of the cephalon slightly 

 arched in the middle. Terminal segment of the pleon broadly triangular, 

 apex acuminated, sides straight. Uropoda with the outer division falciform ; 

 the inner lobe scarcely more than half the length of the latter. 



Length, one-fourth to one-third of an inch. 



OniscHS muscoriim. Scopoli, Entom. Carniol. p. 1145. Cuvier, in Journ. 



d'Hist. Nat. i. t. 26, f. 6, 7. Coquebert, Illust. 



Iconog. t. 6, f. 12. 

 Philoscia muscoruon. Latreille, Hist. Crust, et Ins. vii. p. 43. Gen. 



Crust, et Ins. i. p. 69. Leach, Trans. Linn. Soc. 



xi. p. 375. Ediu. Enc. vii. p. 406. SuppL Enc. 



Brit. i. p. 428. Samouelle, Ent. Compend. p. 111. 



KiNAHAN, Nat. Hist. Rev. v. 4, 1857, p. 280, 



pL XX. figs. 1-6 ; V. 5, 1858, pp. 194, 195, pL xxi. 



f. 4. White, B. M. Cat. Brit. Crust, p. 72. Pop. 



Hist. Brit. Crust, p. 235. (Not the P. muscorum 



of Lereboullet, which is an Oniscus.) 

 Oniscus sylveslris. Fabriciits, Ent. Syst. ii. p. 397. 



Ligia melanocephala. Koch, in Herrick-Schaffer Contin. of Panzer Ins. 



Deutschl. 162, 18 ; ibid. Deutschl. Crust. 22, 18. 

 Zia meUuwrephaJa. Ibid. sub. Ins. D. 180, 1, and D. Giust. 40, 1. 



