156 BULLETIN 15 7, V. S. NATIONAL MUSEUM 



the orange ground color. There is some variation in the depth of 

 the orange, and considerable variation in the extent of the yellow, 

 but so far as I have seen the yellow is always present. The size of 

 the spring butterflies is quite uniform, and they are scarcely larger 

 than the representatives of C. philodice with which they fly. 



This form, which is more intensely colored than typical keewo/ydin 

 and which I previously regarded as rather pale eurytheme^ persists 

 throughout the summer, and is at all times the most abundant form. 



The early individuals of the second brood, appearing early in June, 

 resemble the butterflies of the spring brood. After the first of July 

 very light individuals of the form keetoaydin appear, flying with the 

 others, and by the middle of July these have become common; they 

 remain common until the end of the season. In the last week in July 

 the small dry form a/nadne appears and slowly increases in numbers 

 until the end of the season, though it is never very numerous. 



After the first of August the males are for the most part somewhat 

 darker than the males that occurred earlier in the summer, and usually 

 show pronounced violet reflections, which in a few are very brilliant 

 in life. Many of the females are also somewhat darker than those 

 found earlier in the summer, and are uniform orange over the entire 

 fore wings within the black border and over the light area of the hind 

 wrings, including the submarginal spots more or less inclosed within 

 the dark border. In boggy pastures near the river the females fre- 

 quently reach a very large size. This deep orange form, which 

 becomes common after the first of August and increasingly common 

 to the end of the season, I take to represent typical eurythe7ne. 



In 1930 the rather deeply colored keewaydin form was the only one 

 met with throughout the season. If the others occurred at all they 

 must have been very scarce. 



Re^narks. — The typical light keewaydin and the typical dark 

 eurytlieine^ which are of the same size, seem to intergrade to a con- 

 siderable extent, but the small ariadne^ while rather variable, is more 

 distinct, though specimens are sometimes found which might be 

 considered as intergrades between this and the light keewaydin. 

 The light and small ariadne, however, is often distinguishable from 

 G. philodice only with the greatest difficulty, particularly in the case 

 of the females. Indeed, it seems to intergrade completely with C. 

 philodice in this region. From the evidence at hand it would seem 

 that intergradation between ariadne and philodice^ which have the 

 same habits, is as complete as the intergradation between keewaydin 

 and eurytheme^i which also have the same habits, their habits differ- 

 ing from the habits of the other pair. 



White females of the form eurytlieme are fairly common. White 

 females of the form keewaydin occur, but are infrequent. No white 

 females definitely determinable as belonging to the form ariadne have 



