THE CANADIAN ENTOMOLOGIST. 225 



as shown in fig. 22. Hind wings yellow, with a terminal black border; 

 sometimes much broken, as in fig. 22. Under side in fig. 21, the light 

 part yellow, more or less red stained at base. 



One ,j^ from Southern California, three ^ 's from Colorado, two $ 's 

 from Truckee, Cal., and five ^ 's from other parts of California. Besides 

 this there are two ^ intergrades with Decia from Colorado, four $ inter- 

 grades with Decia from Truckee, Cal., and two ^ 's and one % intergrade 

 with Decia from Southern California. 



One of the principal variations in these forms is found in the amount 

 of black on the hind. wings, ranging from wholly black to a few black 

 spots as a terminal border. The first breaking up of the solid black is 

 found in a single light point near anal angle, then a few pale scales across 

 the wing, next a band of light, in the succeeding stage the basal part 

 invaded by pale rays, and finally all the black obliterate except the ter- 

 minal border. In the specimens having only the terminal border of 

 black, there is a fine penciling of black along the veins, and in the inter- 

 grades between Wrightii and Decia a gradual fading out of both the. 

 transverse band and rays may be found till there is nothing but the 

 obliterate penciling of the veins left. Variety 5, Occidefitaiis, seems to 

 be an irregular form that only partially falls within the line of the regular 

 variation. The fore-wings are black in the red forms, with but little if any 

 gray tint ; in the yellow forms, slightly gray tinted, with three more or less 

 distinct transverse bands, which in the gray wings lack the gray tint, and 

 contain in nearly all of them a iew white or whitish spots. When only a 

 few spots are present, these are costal in second and third band, and one 

 at posterior angle in third band. Varieties 1 , 2 and 4 seem to come from 

 an unusal development of the second band. 



The varieties are largely local. The prevailing color of Southern 

 California examples, as seen by the localities under the several varieties, 

 is crimson ; the Sierra Nevada and Colorado forms are mostly yellow, 

 and the Oregon and North California forms are orange. These are the 

 prevailing colors. In the Truckee specimens all my males were yellow 

 and females varying from almost a distinctive orange to yellow, with 

 traces of the red tinge along the veins (of hind wings, of course). In 

 Lord Walsingham's collection from Oregon the prevailing color was 

 orange, and we find that color extending into California. But in each of 



