094 



BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



TRICHONISCUS PUSILLUS Brandt. 



TricJionisci's pusllJus Brandt, Bull. Soc. Iniper. cU\s Naturalistes de Moscou, VI, 

 1833, p. 12, pi. IV, fig. 9. 



Jtea riparia Koch, Deutschl. Crust., 1835-44, p. 22. 



Itea Lnis Zaddach, Synops. Crust. Pruss., 1844, j). 16. 



PJiUonyvki riparia. Kinahan, Nat. Hist. Rev., IV, 1857, p. 281, pi. xxii, figs. 1-4. 



TricJioniscus pusiUus Stuxberg, Ofversigt-Vetensk-Akad. Forhandl., 1875, No. 

 2, p. 49. — BuDDE-LuND, Crust. Isop. Terrestria, 1885, p. 244-245. — Under- 

 wood, Bull. 111. State Lab. Nat. Hist., II, 1886, p. 364.— Sars, Crust. Nor- 

 way, II, 1899, p. 161.— Richardson, American Naturalist, XXXIV, 1900, 

 p. 307; Proc. U. 8. Nat. Mus., XXIII, 1901, p. 575. 



c ..^ - d 



I 



Fig. 733.— TRICHONISCUS pu.sillus (After Sars). a, Anterior and po-sterior lips, b, First 

 MAXILLA, c, Dorsal view ok female, rf, First antenna, e. Second antenna. /, Terminal 



•TOINT OF first ANTENNA, g, MANDIBLES, h, MaXILLIPED. t, La.ST SEGMENT OF ABDOMEN AND 



URf)PODA. ,/, Second maxilla. /•, Flagellum of second antenna. I, Head (lateral view). 

 7H, First pleopod. n, Outline of terminal segment, o, Seventh leg. p, Second pleopod. 

 (/, First lec;. r, Third pleopod. .«, Fifth pleopod. 



