-5- 



P. nearcticus and one eastern one P. celsus . Rloptila Blickle and 

 Denning contains one species R. arizonica from Arizona and Utah. 

 Stactobiella Martynov in North America embraces the following four 

 species: S. brustia , n.w. U.S.A. and Arizona, S. delira known from 

 California and Oregon to north central U.S.A. and New Hampshire, 

 S. palmata , southern Canada, northern U.S.A., and the North Central 

 states, and S. martynovi , Tennessee (Smoky Mts.). 



In the last genus the term "bracteole" is used in the table 

 for determination. Ross (19A8) gives the following: ...."a struc- 

 ture associated with the area dorsad of the base of each clasper... 

 In some cases this appears as a small structure at the base of each 

 clasper in others the structure is larger and more conspicuous than 

 the clasper and probably usurps its function. For this I propose 

 the term bracteole." S. delira is an example of one with a small 

 structure and S. palmata of the large, conspicuous one. 



