362 lUinois State Lahoratory of Natural History. 



X. POROELLIO Latr. 



1. P. coNVEXUS Johnsson. Sveriges Oniscider, 32 (1808). 

 — Stuxherg. Ofversigt af Vetensk.-Akad. Forhandl., 1875, 

 No. 2, 60. ' 



Oniscus convexus DeGeer (1778). 

 Hah. — Massachusetts, and Canada near Niagara (Eisen). 



2. P. DUBius Brandt. Conspectus Oniscodorum, 178 

 (1833). 



Hab. — ? [This species is cited by Stuxberg loc. cit. 58.] 



3. P. FORMOSUS Stuxberg. Ofversigt af Vetensk.-Akad. 

 Forhandl., 1875, No. 2, 57. 



Hab. — California (Eisen). 



4. P. GEMMULATUS Dana. Crustacea, 725, t. 47, fig. 7 

 (1853). 



Hab. — Washington Territory {Dana). 



5. P. GLABER Fitch. Trans. N, Y. State Agric. Soc. 1854, 

 824; First and Second Rep. on Insects, 120 (1856). 



Hab.— New York {Fitch). 



6. P. IMMACULATUS Fitch. Trans. N. Y. State Agric. Soc. 

 1854, 824; First and Second Rep. on Insects, 120 (1856). 



Hab. — Illinois and Arkansas (Fitch). 



7. P. LiMATUS Fitch. Trans. N. Y. State Agric. Soc. 1854, 

 824; First and Second Rep. on Insects, 120 (1856). 



Hab.— New York (Fitch). 



8. P. MACULicoRNis Koch. Deutschlands Crustaceen, 84, 

 16 (ISiO). —Stuxherg. Ofversigt af Vetensk.-Akad. Forhandl. 



1875, No. 2, 55. 



Hab. — California (Eisen). 



9. P. MixTus Fitch. Trans. N. Y. State Agric. Soc. 1854, 

 824; First and Second Report on Insects, 120 (1856). 



Hab.— New York (Fitch). 



10. P. NIGER Say. Jour. Phila. Acad, i, 432 (1811).— De- 

 Kay. Nat. Hist. N. Y., vi, 52 (1844). 



Hab. — Pennsylvania [Say) . 



