362 Illinois State Laboratory of Natural History. 



X. POBCBLLIO LATR. 



1. P. CONVEXUS Johnsson. Sveriges Oniscider, 32 (1868). 

 -Stuxberg. Ofversigt af Vetensk.-Akad. Forhandl., 1875, 

 No. 2, 60. 



Oniscus convexus DeGeer (1778). 

 Hob. Massachusetts, and Canada near Niagara (Eisen}. 



2. P. DUBIUS Brandt. Conspectus Oniscodorum, 178 

 (1833). 



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



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

 Forhandl., 1875, No. 2, 57. 



Hob. California (Eisen). 



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

 (1853). 



Hob. Washington Territory (Dana). 



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

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



Hab.Xew York (Fitch). 



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

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



Hob. 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. MACULICORKIS Koch. Deutschlands Crustaceen, 34, 

 16 (1840). Stuxberg. 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 ( 1817). De- 

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



Hab.- Pennsylvania (Say). 



