THE CANADIAN ENTOMOLOGIST. Ill 



In 1872, I described Colias Astrcea from a male taken by ihe Hayden 

 Expedition in Montana. The upper surface was of a delicate buff. In 

 1883, Mr. Wm. M. Courtis, M. E., at Judith Mtn., Montana, took four 

 males of the typical form ; and, in 1890. Mr. W. G. Wright, at same 

 place, took both Astrcea and orange Christina in both sexes. 



In Can. Ent., XV., p. 221, 1883, Captain Gamble Geddes gave a list 

 of butterflies taken by him, and among these was Astrcea, and also 

 Christina., both from Red Deer River. I saw these examples, and they 

 embraced not only typical individuals but others of varying shades of 

 colour, connecting the two supposed species ; and with these lemon- 

 yellow examples that seemed to belong to the same species with the others. 



Within the last two years, Mr. Burrison and Prof. Owen have collected 

 at Banff, and found all these forms— the orange, the buff and the yellow, 

 with intermediate grades in great variety. Mr. Bean, at Laggan, has not 

 only taken numbers of the same forms, but has carefully bred from the 

 egg, and established the unity of the species Christina with Astrcea, and 

 the yellow form ; and in due time we may look for a full account of his 

 observations. From a small lot of larvae of Christina just out of hiber- 

 nation, sent by Mr. Bean, and received 28th May, 189 1, I got four 

 pup^. On 19th June, emerged a green-yellow male ; on 21st, another 

 male, same form; on 22nd a green-yellow female; on 24th a yellow 

 female with orange on the disks of the forewings. At the fourth (and 

 last) moult the larva was .8 inch long; colour dark yellow green ; along 

 base a white stripe, within which, a few hours after the moult, a yellow 

 stain began to show itself; no subdorsal white stripe ; the under side 

 light yellow-green ; whole upper surface thickly covered with fine tuber- 

 cles and short hairs of light colour ; head yellow-green. At maturity the 

 length was 1.4 inch ; the yellow had become red in the band, but it was 

 not in a continuous line as in many species of Colias, there being only a 

 short red dash behind each spiracle. 



The pupa was similar in shape and appearance to that of Philodice. 

 Length, .78 to .8 inch; breadth, both across mesonotum and abdomen, 

 .2 inch; the greatest depth, .24 inch; colour yellow-green, the ventral 

 side of abdomen less green, more yellow ; a broad yellow stripe from 13 

 to wing cases on mid-side, and continued, but in diminished breadth 

 along the dorsal edge of wing to end of the beak ; on the side of the 

 abdomen below the yellow stripe a narrow stripe of red-brown crosses 

 three segments from the wing case. Duration of the pupa stage about 

 seven days. 



