Genus Colias 
typical form of the species. We have given, in addition to these, 
the following forms: 
{a) Winter form ariadne, Edwards, Plate XXXVI, Fig. 7, $ ; 
Fig. 8, $. This form, emerging from chrysalids which have 
overwintered, is like the type in having the fore wings tinged 
with orange. Expanse, 1.75 inch. 
(b) Winter form keewaydin, Edwards, Plate XXXVI, Fig. 9, 
$ ; Fig. 10, $ . This is a larger form, more deeply flushed with 
orange, though not quite as deeply as shown in the plate. Ex¬ 
panse, 1.85 inch. 
(c) Summer form eriphyle, Edwards, Plate XXXV, Fig. 15, $ ; 
Plate XLIII, Fig. 3, $ , under side. This summer form differs from 
typical C. eurytheme in being yellow and not laved with orange. 
Expanse, 2.00 inches. 
Early Stages. —The caterpillar feeds on clover, as do most of 
the species of the genus. 
The range of eurytheme is very wide. It extends from the 
Atlantic to the Pacific, and from Canada to the far South, though 
rare in the lower parts of Florida and Texas in the hot lands. 
(4) Colias philodice, Godart, Plate I (Frontispiece), Fig. 4, 
$ ; Fig. 5, ? ; Plate II, Fig. 10, larva; Plate V, Figs. 54, 35, 
chrysalis (The Common Sulphur). 
Butterfly. —We are all familiar with this species, the “ puddle 
butterfly ” of our childhood, which sits in swarms on moist 
places by the wayside, and makes the clover-fields gay with the 
flash of yellow wings in summer. There are many aberrational 
forms, albinos and negroes, white forms and dark forms, dwarfed 
forms and large forms, but in the main the species is remarkably 
constant, and seasonal forms and distinctly local races do not 
abound as in the case of the preceding species. Expanse, $, 
1.25-1.80 inch; ?, 1.60-2.25 inches. 
Early Stages. —The food-plant is clover. The eggs are pale 
yellow, changing, after being laid, to crimson. The caterpillar 
is slender, green, striped longitudinally with paler green. The 
chrysalis is pale green. 
The species ranges from New England to Florida, and west¬ 
ward to the Rocky Mountains. 
(5) Colias chrysomelas, Henry Edwards, Plate XXXV, Fig. 
12 , $ ; Fig. 13, ? (The Gold-and-black Sulphur). 
Butterfly. —Larger than C. philodice. The male on the upper 
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