Hagen.] 158 December 27, 



will doubt that both belong to one and the same species. I have 

 to add that two C. Alexandra before me have produced outer 

 angles of about 100°. Mr. H. Edwards states, p. 10, " described 

 from a single male (female not mentioned) in Dr. Behr's collec- 

 tion. The wings are remarkably angular about the middle, and 

 the marginal border follows the shape of the wing. In other 

 respects it resembles C. interior, and may be a form of that 

 species." 



The female type seems no longer to be in Dr. Behr's collection. 

 The short description by Mr. W. H. Edwards' contains nothing 

 which would help to separate C. Emilia and C. Edwardsii. 



Colias Astraea. 



C. Astraea W. H. Edw. Trans. Ent. Soc. Phil, iv, p. 61. 1872. 

 H. Edw. Colias p. 7 (Calif. Acad.). 



This species was described from a single male, antennae want- 

 ing, taken near Yellowstone Lake by the Hayden Expedition in 

 1871. " On the underside this species is nearest Alexandra, on 

 the upper of a different shade of color from any of our species." 

 This different shade is as follows : " Upperside pale ochraceous, 

 very little tinted with orange on disks of secondaries from cell to 

 marginal border and from base to base to hind margin of seconda- 

 ries below cell, this color being not decided but only a tint? All 

 the rest of the description agrees with C. Alexandra and with 

 some specimens of C. Edwardsii. Mr. H. Edwards examined two 

 males from the Yellowstone region in Mr. W. H. Edwards' collec- 

 tion, and says "it is singularly distinct in color from any other 

 known Colias, being a pale buff, rather than yellow proper." 



I have submitted to Mr. H. Edwards a female of C. Edwardsii 

 from Washington Territory with similar color, and he decided 

 that it was much like C. Astraea. Now this color was prepared 

 purposely. When the specimen was taken, it was put in a freshly 

 prepared cyanid bottle, which was still damp inside, so that both 

 hind wings were thoroughly wetted. The supposed change in the 

 color appeared after the specimen had become dry. I suggested 

 the same reason for the color of C. Astraea, but Mr. W. H. 

 Edwards objected decidedly. I have even more reason to sup- 



