The forms lucia and marginata are winter forms, coming from chrysalids which have en- 

 dured the long cold of the winter months and are the first to appear in spring. They are the 

 only forms which occur in the far north near the Arctic Circle. 



The forms pseudargiolus and neglecta are summer forms of the second and third genera- 

 tions, produced from eggs laid by lucia and marginata. Nigra is a dimorphic female form be- 

 longing to the summer broods and is melanic; that is to say, it is a form in which dark color 

 prevails. Students of biology recognize a tendency in some animals to become black, while 

 there is also a tendency to become white, or to produce albinoes. These tendencies in op- 

 posite directions in color are often observed in butterflies, and the melanic female of the 

 species under consideration illustrates it. There is still another form, piasus, which occur! 

 in Arizona and Mexico, and is climatic, or due to the influence of environment. 



The winter forms are dwarfed and darkly marked on the under side as our figures show 

 the summer forms are larger, pale on the under side and dark on the outer borders above. 



The species has a range in the expanse of wing of from 0.85-1.25 inch. 



It occurs from Alaska to Florida, and from Anticosti to northern Mexico. 



(G) Lyccena amyntula Boisduval, Plate XCIII, Fig. 1, cT ; Fig. 2, $ (The Western Tailed 

 Blue). 



Male pale blue on upper side; female darker, the hind wings with a submarginal row of 

 orange crescents pupilled with black. Expanse 1.00-1.25 inch. 



Ranges from the Rocky Mountains to the Pacific in British America and southward as 

 far as Colorado. 



(7) Lycaenacomyntas (Godart), Plate XCIII, Fig. 3,6"; Fig. 4, $ (The Eastern Tailed Blue). 



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