MILLIPEDS OF NORTH AMERICA 103 



Type : Present location unknown. 



Type Locality : New Haven, Orange County, Connecticut. 



Range : Known definitely only from type locality. 



Tricliopetalum mentis Chamberlin 



Trichopetalum montis Chamberlin, 1951, Great Basin Nat., vol. 11, p. 24, 



figs. 13, 14. 

 Type : Collection of R. V. Chamberlin. 

 Type Locality: Gatlinburg, Sevier County, Tennessee. 

 Range: Known only from type locality. 



Trichopetalum uncum Cook and Collins 



Trichopetalum uncum Cook and Collins, 1895, Ann. New York Acad. Sci., 



vol. 9, p. 66, fig. 51. 

 Type: U. S. Nat. Mus. 



Type Locality : Bloomington, Monroe County, Indiana. 

 Range: Indiana and Illinois, south to Arkansas. 



Genus TRIGENOTYLA Causey 



Trigenotyla Causey, 1951, Proc. Biol. Soc. Washington, vol. 64, p. 118. 

 Generotype : Trigenotyla parca Causey, by original designation. 

 Range: Arkansas. 

 Species: One. 



Trigenotyla parca Causey 



Trigenotyla parca Causey, 1951, Proc. Biol. Soc. Washington, vol. 64, 



p. 118, figs. 1-5. 

 Type: Acad. Nat. Sci. Philadelphia. 

 Type Locality: Carroll County, Arkansas. 

 Range: Known only from Carroll and Washington Counties, Arkansas. 



Genus TYNOPUS Chamberlin 



Tynopus Chamberlin, 1940, Canadian Ent., vol. 72, p. 57. 

 Generotype: Tynopus dux Chamberlin, by original designation. 

 Range: North Carolina. 

 Species: One. 



Tynopus dux Chamberlin 



Tynopus dux Chamberlin, 1940, Canadian Ent., vol. 72, p. 57. 

 Type: Collection of R. V. Chamberlin. 



Type Locality: Duke Forest, Orange County, North Carolina. 

 Range : Known only from type locality. 



Genus ZYGONOPUS Ryder 



Zygonopus Ryder, 1881, Proc. U. S. Nat. Mus., vol. 3, p. 527.— Cook and 

 Collins, 1895, Ann. New York Acad. Sci., vol. 9, p. 59. 



