No. 1775. COSTA RICAN TERRESTRIAL ISOPODS. 95 



uropoda extends to the tip of the inner postero-lateral angle of the 

 basal article; outer branch minute, situated about the middle of the 

 dorsal surface of the basal article. 



Twelve specimens of this species were collected by Prof. J. F. Tristan. 

 The type was found on the road between Juan Vinas and Reventazon. 

 The other specimens came from Turrialba. 



Type.— Cut. No. 40896, U.S.N.M. 



Named for the collector. 



PHILOSCIA MUSCORUM (ScopoH). 



Oniscus muscorum Scopoli, Entomologia Carniolica, 1763, p. 415. 



Philoscia muscoruvi Latreille, Hist. Nat. Crust. Ins., vol. 7, 1804, p. 43; Gen. 

 Crust. Ins., vol. 1, 1806, p. 69. — Budde-Lund, Crust. Isop. Terrestria, 1885, 

 pp. 207-209. (See Budde-Lund for further synonymy.). — G. 0. Sars, 

 Crust. Norway, vol. 2, 1899, pp. 173-174, pi. 76, fig. 1. 



Localities. — Santa Maria Dota; road between Juan Vinas and 

 Reventazon, Costa Rica. 



Distribution. — Denmark, Germany, Holland, Poland, Austria, 

 Great Britain, France, Spain, Italy, Algeria, and Woods Hole, Massa- 

 chusetts, U. S. A. 



METOPONORTHUS PRUINOSUS (Brandt). 



Porcellio 'pruinosus Brandt, Bull. Soc. Imp. Naturalistes de Moscou, vol. 6, 



1833, p. 19. 

 Metoponorthus pruinosus Budde-Lund, Crust. Isop. Terrestria, 1885, pp. 169-171. 



(See Budde-Lund for further synonymy.). — G. O. Sars, Crust. Norway, vol. 



2, 1899, pp. 184-185, pi. 80, fig. 2. 



Locality. — Turrubales, Costa Rica. 

 Distribution. — World wide. 



