16 BRITISH BUTTERFLIES 
SPECIES 2.—COLIAS HYALE. THE PALE-CLOUDED YELLOW BUTTERFLY. 
Plate ii. fig. 5—7. 
Synonymrs.— Papilio (Danai Candidi) Hyale, Linn, Syst. Nat. ii. Le Soufre, Ernst. Pap. d'Europe. 
p. 764. Lewin Brit. Butt. pl. 33. Donovan Brit. Ins. 7 pl. 238, 
fig. 1 (male). 
Colias Hyale, Ochsenheimer, Leach, Stephens, Curtis, Brit. Ent. pl. 
242 ; Duncan Brit. Butt. pl. 6, fig. 1. 
Papilio Paleno, Esper. 1, pl. 4, fig. 2. Fischer Entomol. de la 
Russ. Lepid. pl. 11, fig. 1, 2. (Colias P.) 
This species is from two inches to nearly two inches and a quarter in expanse. Its upper surface is of a 
sulphur colour in the males, or of a cream colour in the females ; in other respects the sexes are nearly alike, 
having a black discoidal spot and an irregular, broad, black, apical margin, in which is an interrupted series of 
spots of the same colour as the ground of the wings; the hind wings are darker on the disc, with an orange- 
coloured discoidal spot, and the margin is very slightly and irregularly marked with black. The fore wings are 
beneath whitish yellow, with the apex orange yellow, having a row of transverse blackish marks parallel with, 
but at some distance from, the apical margin ; the discoidal spot is black, with a yellowish middle ; the hind 
wings beneath are orange yellow, with a large silvery spot, accompanied by a minute eye-like dot surrounded with 
reddish, and between these and the apex of the wings is a row of small blackish spots. 
The caterpillar, which feeds on Medicago, various species of Trifolium, and other leguminose plants, is of a 
velvety green colour, with two lateral yellow stripes, and with black dots on the segments ; the chrysalis is green, 
with a yellow lateral line. 
Although very abundant on the Continent (where it appears to be double-brooded, May and August, or 
September, being the times of its appearance), and extending to the north of Africa, Siberia, Cachemere, and 
Nepaul, this butterfly is much rarer in England than the preceding ; the coasts of Kent, Sussex, and Suffolk, 
having furnished the greatest number of specimens. Others have been found in Epping Forest, and near 
Halvergate in Norfolk. 
DESCRIPTION OF PLATE III. 
Insects.—Fig. 1. Colias Chrysotheme ? (small clouded-yellow Butterfly), the male. 2. The female. 3. The underside. 
ss Fig. 4. Colias Europome ? (the clouded sulphur B.) 5, Female. 6. The underside. 
Prants.—Fig. 7. Lotus corniculatus (common bird’s-foot trefoil). 8. Lotus major (great bird’s-foot trefoil). 
In this plate I have figured Colias Europome ? and Colias Chrysotheme? C. Europome is evidently a distinct species, but is by many denied 
to be British ; as, however, it is found in many English collections, this work would not be complete without it. It is from the Haworth 
specimens in the collection of Mr. Stephens. The caterpillar is unknown.  C. Chrysotheme ? is occasionally found, but is by many deemed a 
small variety of C. Edusa; and in Mr. Stephens’s cabinet a small true Edusa is placed next to it, in which there is scarcely any perceptible 
difference. The discovery of the caterpillar, which is unknown, would solve the question. It should be sought for near the coast, where the 
trefoils are abundant, which are its probable food. I have placed it in the same plate with Europome to show the completely distinct colour of 
the latter species, Europome being of a decided citron, whilst Chrysotheme and Edusa are of a rich full orange. The colour of Kuropome is 
exactly midway between the pale sulphur of Hyale and the orange of Edusa, and perfectly distinct from both. I would therefore propose as 
English names, clouded orange for Edusa, clouded sulphur for Hyale, and clouded citron for Europome, as being more descriptive of the 
insects than those which, from being now in use, I have adopted above. H. N. H. 
