SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOLUME 80, NUMBER 11 



THE LEGS AND LEG-BEARING SEGMENTS OF SOME 



PRIMITIVE ARTHROPOD GROUPS, WITH 



NOTES ON LEG-SEGMENTATION 



IN THE ARACHNIDA 



(With 12 Plates) 



BY 



H. E. EWING 



Federal Bureau of Entomology 



(Publication 296J1 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



APRIL 23, 1928 



