99 



any other from California; but tlir fore wiiiirs arc ratlicr lonL'fr, ilu- outer 

 edge being more obli(|(i('. 'V\\e bind willies arc also ratlicr longer than 

 in var. nubilqfascidta. Head and tliorax pale-gray, with yellowish scales;. 

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

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

 then a black band: liirthcr toward the middle of the wing is a i)lackish 

 Y-shaped band, the Ibrk bcginniiiij; just below the sui)costal vein. .lusl l)eyond 

 the middle of the wing is a broad, irregular, conspicuous, snow-wl.ite band, 

 over twice as wide on the costa as on the inner edge of the wing; the i)and 

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

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

 aiul below is irregularly scallope<l. A su.bmarginal smoky band. Hind wings 

 smokv-gray as usual, immaculat(\ Beneatii. l()re wings dusky, l)lackish on the 

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

 ot the wing; beyond is a triangidar, costal, pale spot. Hind winirs with a 

 discal <l()t and two curious dusky lines. 



Length of body, 0.40; of fore wing, O.ti.H inch 



Calit"ornia (Edwards and Behrings). 



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

 bands 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. callforniatd, though 

 both apparently are very al)uiidant. 



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

 coprcea and S. cinerea being preferred. The young cat(>rpillars emerge in 

 twelve days, and feed on the . callow-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 e.xpand. They then grow very rapidly, and are freepiently full-fed by 

 the first of June. The lull-fed caterpillar has a singular habit of secreting 

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

 too-ether in masses. It seems to feed principally during the niijht. When 

 full-fed, it is an obese and lethargic caterpillar, which doubles itself u]) and 

 falls 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 



