74 



respect more like acastus than palla. With the exception of two speci- 

 mens our type series of 13 S 's bears no more explicit labelling than 

 the state label "Colorado", having been probably collected by D. Bruce ; 

 these two specimens are labelled respectively Glenwood Spgs., Colo., 

 and Hall Valley, Colo. We have the species further from Utah (Provo, 

 Salt Lake) and also from the Yellowstone Park Region. The form 

 may prove to be a race of palla and with sufficient material from known 

 localities connecting links may be found with the Colorado specimens 

 already mentioned from Denver and Manitou ; for the present, how- 

 ever, we see no harm in treating it as a separate species. 



