46 n. S. NATIONAL MUSEUM BULLETIN 212 



Type Locality: 12 miles northeast of Piggott, Clay County, Arkansas. 

 Range : Known only from type locality. 



Pleuroloma proxima (Causey) 



Zinaria proxima Causey, 1951, Proc. Arkansas Acad. Sci., vol. 4, p. 86, 



pi. 1, figs. Ig, 2a, 3c, and pi. 2, figs. 8e, 12. 

 Type: Acad. Nat. Sci. Philadelphia. 

 Type Locality: Ann Arbor, Michigan. 

 Range: Known only from type locality. 



Pleuroloma rubrilata (Hoffman) 



Zinaria rubrilata Hoffman, 1949, Proc. Biol. Soc. Washington, vol. 62, 



p. 84. 

 Type: U. S. Nat. Mus. (No. 1849). 



Type Locality : 1 mile north of Kilmarnock, Lancaster County, Virginia. 

 Range : Known only from type locality and vicinity. 



Pleuroloma urbana (Chamberlin) 



Zinaria urbana Chamberlin, 1939, Bull. Univ. Utah, biol. sen, vol. 5, 



No. 3, p. 5, fig. 5. 

 Type: Collection of R. V. Chamberlin. 

 Type Locality: Urbana, Champaign County, Illinois. 

 Range: Champaign and adjoining Counties Illinois. 



Pleuroloma warreni (Causey) 



Zinaria warreni Causey, 1951, Proc. Arkansas Acad. Sci., vol. 4, p. 83, figs. 



Ic, 3b, 6, 8c, 10. 

 Type : Acad. Nat. Sci. Philadelphia. 

 Type Locality: Carroll County, Arkansas. 

 Range : Also known from Cherokee and Latimer Counties, Oklahoma. 



Genus RHYSODESMUS Cook 



Rhysodesmus Cook, 1895, Ann. New York Acad. Sci., vol. 9, p. 5. — Pocock, 



1909, Diplopoda, in Biol Centr.-Amer., p. 188.— Attems, 1938, Das 



Tierreich, Lief. 69, p. 138.— Chamberlin, 1943, Bull. Univ. Utah, 



biol. sen, vol. 8, No. 3, p. 36. 



Aporiaria Chamberlin, 1938, Proc. Biol. Soc. Washington, vol. 51, p. 207 



(generotype: A. texicolens Chamberlin). 

 Generotype: Polydesmus Umax Saussure, by original designation. 

 Range: Southwestern Texas and New Mexico south through Mexico to 

 Yucatan and Guatemala. 



Species: Sixty-one, of which two named forms (others occur) are known 

 from our limits. 



Rhysodesmus anamesus (Chamberlin and Mulaik) 



Aporiaria anamesa Chamberlin and Mulaik, 1941, Journ. New York Ent. 

 Soc, vol. 49, p. 57. 



