PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM 



issued l&f.nVcu \!I^j ^y '^c 



SMITHSONIAN INSTITUTION 

 U. S. NATIONAL MUSEUM 



Vol.109 Washington : 1959 No. 3411 



A REVISION OF THE MILLIPED GENUS BRACHORIA 

 (FOLYDESMIDA : XYSTODESMIDAE) 



By William T. Keeton ^ 



Introduction 



The present paper is an attempt to treat in a systematic manner one 

 of the many groups of Diplopoda where revisionary attention has 

 been sorely needed. Three previously recognized genera of the family 

 Xystodesmidae will be considered. These are Brachoria Chamberiin, 

 1939, Tucoria Chamberiin, 1942, and Anjractogon Hoffman, 1948. 

 Until the present time, 12 different specific names have been assigned 

 to the genus Brachoria, five to Tucoria, and one to Anfractogon. 

 Though it has long been understood that these three nominal genera 

 are closely related, no attempt has been made to study their relation- 

 ships carefully and thereby to ascertain the validity of the three 

 generic names. 



The primary considerations affecting the course of the present study 

 have been fourfold. First is the consideration of the three genera 

 Brachoria, Tucoria, and Anfractogon and their validity as separate 

 taxonomic entities. Second is the evaluation of all specific names 

 based upon members of this group. Third is the provision of accurate 

 descriptions and illustrations of those forms which appear to be valid. 

 Fourth is the description of all new forms which have been found in 

 the course of this study. 



• Department of Entomology, Cornell University, Ithaca, N. Y. 



