ISOPODS OF NOETH AMERICA. 617 



extends a short distance beyond the terminal segment of the body; 

 outer branch extends ])ut very little beyond the inner l)ranch. 



One specimen was collected b}" Prof. A. E. Verrill at the Bermudas 

 in 1901. 



Type specimen in Peabody Museum, Yale University. Cat. No. 

 3353. 



PORCELLIO RATHKEI Brandt. 



Porcellio rathkei Brandt, Bull, de la soc. Imp. d. Naturalistes de Moscou, VI, 



1833, p. 15.— Milne Edwards, Hist. Nat. des Crust., Ill, 1,S40, p. 170. 

 Porcellio ferrugineus Brandt, Bull, de la soc. Imp. d. Naturalistes de Moscou, VI, 



1833, p. 16.— Milne Edwards, Hist. Nat. des Crust., Ill, 1840, p. 170. 

 Porcellio trilineatus Kocn, Deutschl. Crust., 1835-1844, p. 34. 

 Porcellio trivittatus Lereboullet, Mem. de la Soc. de museum uat. de 8trasl)ourg, 



IV, 1853, p. 54, pi. I, figs. 13, 14; pi. in, figs. 66-70. 

 Porcellio telramoerus Schnitzler, De Oniscineis agri. Bonnensis, 1853, p. 24. 

 Porcellio slriaius Schnitzler, De Ouisciiieis agri. Bonnensis, 1853, p. 24. 

 Porcellio trilineatus Sill, Verhandl. u. Mittheilungen des Siebenbiirgischen 



Vereins fiir Naturwissenschalten zu Hermannstadt, XIII, 1862, p. 26. 

 Porcellio tririttatas J oiisaoii, Academisk Afhandling, Uj^sala, 1858, p. 25. 

 Porcellio tnlineatus Budde-Lund, Nat.- Tid.«skr. (3), VII, 1870, p. 239.— STttx- 



BERG, Of vers, af Kgl. Vetenskaps Akad. Forh., 1875, p. 59. 

 Porcellio rathkei Budde-Lund, Crust. Isop. Terrestria, 1885, pp. 85-87. (See 



Budde-Lund for synonymy). — Sars, Crust, of Norway, II, 1899, pp. 180-181, 



pi. Lxxix, fig. 1.— Richardson, Amer. Nat., XXXIV, 1900, p. 304; Proc. 



U. S. Nat. Mus., XXIII, 1900, p. 567.— Paulmier, Bull. New York State 



Museum, 1905, pp. 182-183. 



Localities. — Springfield, Ohio; Lockland, Ohio; Columbus, Ohio; 

 Clifton, Cincinnati, Ohio; Chaumont, New York; Syracuse, New 

 York; St. Marys, Georgia; Salem and Beverl}-, Massachusetts; Lake 

 Champlain; New York City; Lawrence, Massachusetts; Washington, 

 District of Columbia; Saginaw, Michigan; Freeport, Maine; Victoria, 

 Texas; Providence, Rhode Island; also Europe. 



Found in woodsheds, greenhouses, on rotten logs, under brick and 

 boards, under logs, at river bottom. 



Body oblong-ovate, a little more than twice as long as wide, 5 mm. : 

 lOi mm. 



Head about twice as wide as long, 1 mm.: 2 mm., with the anterior 

 margin produced in three lol)es, the median one being less produced 

 than the lateral lobes and all having rounded extremities. The eyes 

 are small, composite, and situated at the base of the antero-lateral 

 lobes. The tirst pair of antenuiv are small and inconspicuous and are 

 composed of onl}' two articles. The second pair of antennie have the 

 first article short; the second about one and a half times as long as the 

 first; the third equal in length to the second; the fourth twice as long- 

 as the third; the fifth one and a half times as long as the fourth. The 

 flagellum is composed of two sub(M{ual articles. The second antennae 

 extend to the posterior margin of the third thoracic segment. 



