No. 13. — The Geophiloidea of the Southeastern States. 

 By Ralph V. Chamberlin. 



Our knowledge concerning the Chilopoda of the southeastern 

 section of the United States has long been so meager and fragmentary, 

 that it is considerable satisfaction to present a revision of the Geo- 

 philoidea of the region based upon the study of rather extensive 

 material. Most of this material was secured by the author himself 

 through systematic collecting carried out during the summer of 1910, 

 every section of the region being visited excepting southern Florida 

 (which, as belonging rather to another fauna, is not included) and the 

 coastal portions of Georgia and the Carolinas. It has been possible 

 to ascertain somewhat clearly the limits of distribution of a number 

 of important species together with the range and directions of their 

 variations and thereby to bring about simplification through the 

 relegation to synonymy of many names given to forms of non-specific 

 grade. All the species previously recorded from the region were 

 secured, as well as representatives of a number of undescribed ones, 

 among which are the types of two genera for which it seems necessary 

 to erect a new family. Of importance, also, was the rediscovery of 

 Bollman's Scolioplancs gracilis, later made the type of the genus 

 Agathothus, the affinities of which have for twenty years been in 

 doubt, no diagnosis having heretofore been published. 



Dr. Meinert's types of North American species in the collection 

 of the Museum of Comparative Zoology have been available for study 

 and comparison during the preparation of this paper. The types of 

 the new species are also in the collection of the Museum. 



The following list is introduced by way of summary; synonyms are 

 printed in italics. 



GEOPHILIDAE. 

 GEOPHILINAE. 



Polycricus Humbert and Saussure. 



P. floridanus Cook = P. marginalis (Meinert). 

 P. marginalia (Meinert). 



