428 PROCEEDINGS OF THE ACADEMY OF [1893. 



but principally the sternal surface of the entire body, among the 

 bases of the appendages. The cocoons are attached to the abdominal 

 sternites, but more frequently to the seta? of the pleopods. They are 

 to be found principally in summer, but are not entirely absent at any 

 season. 



Phila. Pa., and Watauga Co., North Carolina. 



The author has, since writing the above, examined a preparation 

 of B. parasita Braun, in which he was able to distinguish only a 

 single unpaired vas deferens. Compare Vejdovsky, Systemu Mono- 

 graphie der Oligochpeten. 



