Genus Catopsilia 
far as is known, in the regions of the Rocky Mountains and on the 
Pacific coast. 
(8) Euchloe lanceolata, Boisduval, Plate XXXII, Fig. 30, 
$ (Boisduval’s Marble). 
Butterfly .—The figure gives a correct idea of the upper sur¬ 
face of the male. The female on the upper side is marked with 
light-black spots on the outer margin near the apex. On the 
under side in both sexes the apex of the primaries and the entire 
surface of the secondaries, except a small spot on the costa, are 
profusely sprinkled with small brown scales. The veins of the hind 
wing are brown. Expanse, 1.65-1.95 inch. 
Early Stages .—The caterpillar, which feeds upon TurritiSy is 
green, shaded on the sides with pale blue, striped laterally with 
white, and covered with transverse rows of minute black points, 
each bearing a short black bristle. We know nothing of the 
other stages. 
The species ranges from northern California to Alaska. 
Genus CATOPSILIA, Hiibner 
(The Great Sulphurs) 
u A golden butterfly, upon whose wings 
There must be surely character’d strange things, 
Onward it flew, . . . then high it soar’d, 
And downward suddenly began to dip, 
As if, athirst with so much toil, ’t would sip 
The crystal spout-head; so it did, with touch 
Most delicate, as though afraid to smutch 
Even with mealy gold the waters clear.” 
Keats, Endymion. 
Butterfly .—Large butterflies, brilliant lemon-yellow or orange- 
yellow, marked with a few darker spots and with a narrow band 
of brown, especially in the female sex, on the outer margin of the 
primaries. They are very quick and vigorous in flight, more so 
than is the case in any of the preceding genera. 
Egg.- The eggs are spindle-shaped, flat at the base, and acutely 
pointed, with a few longitudinal ribs and a multitude of delicate 
cross-lines. 
Caterpillar .—-The caterpillar is relatively long, with the head 
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