99 



any other from California; but the fore wings are rather longer, the outer 

 edge being more oblique. The hind wings are also rather longer than 

 in var. nubilofasciata. Head and thorax pale-gray, with yellowish scales. 

 Fore wings blackish, with dark olive-green as a ground-color. Base of 

 wing black; beyond is a dark olive-green space, with a few black scales; 

 then a black band; farther toward the middle of the wing is a blackish 

 Y-shaped band, the fork beginning just below the subcostal vein. Just beyond 

 the middle of the wing is a broad, irregular, conspicuous, snow-white band, 

 over twice as wide on the costa as on the inner edge of the wing ; the band 

 on the inner side is rudely sinuate, while the outer edge is nearly straight 

 from the costa to the median vein, when it suddenly widens out into a cone, 

 and below is irregularly scalloped. A submarginal smoky band. Hind wings 

 smoky-gray as usual, immaculate. Beneath, fore wings dusky, blackish on the 

 costa; the white band faintly re-appears as a little paler shade than the rest 

 of the wing; beyond is a triangular, costal, pale spot. Hind wings with a 

 discal dot and two curious dusky lines. 



Length of body, 0,40; of fore wing, 0.63 inch 



California (Edwards and Behrings). 



In one example from Sanzalito, the bands alternating with the smoky 

 bauds are yellowish-green instead of reddish ; in another, the middle band, 

 usually whitish or greenish, is bright brick-red. 



It is a more common species in California than H. californiata, though 

 both apparently are very abundant. 



Larva. — "The eggs are laid in July on several species of sallow, Salix 

 caprcea and S. cinerea being preferred. The young caterpillars emerge in 

 twelve days, and feed on the sallow-leaves until half-grown, when they hyber- 

 nate. In the spring, they begin to feed again as soon as the leaf-buds of the 

 sallow expand. They then grow very rapidly, and are frequently full-fed by 

 the first of June. The full-fed caterpillar lias a singular habit of secreting 

 itself in the seed-down of the sallow during the day, and of spinning this 

 together in masses. It seems to feed principally during the night. When 

 full-fed, it is an obese and lethargic caterpillar, which doubles itself up and 

 tails from its food-plant if shaken or annoyed. The head is narrower than 

 the body, scarcely notched on the crown ; it is porrected in crawling. The 

 body is rather depressed, and slightly attenuated anteriorly. The color of 

 the head is clear-brown, rather glabrous; the cheeks are reticulated .with 



