Genus Catopsilia 



far as is known, in the regions of the Rocky Mountains and on the 

 Pacific coast. 



(8) Euchloe lanceolate, Boisduval, Plate XXXII, Fig. 50, 

 $ (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 Tiirritis, 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) 



" 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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