
AND THEIR TRANSFORMATIONS. 7 
The species of this genus are few in number, and of moderate size. They appear to be subject in a remark- 
able degree to gynandromorphism, a considerable number of instances of this kind having been recorded by 
different authors, which I have collected in a memoir read before the Entomological Society of London ; in which 
I have also described and figured some very interesting individuals reared by Mr. House, being hybrids between 
S. ocellatus and S. populi, which are the only instances hitherto recorded of a similar result produced by the 
forced union of the sexes of distinct species. One of these is represented in our Plate I, fig. 10, partially 
exhibiting the dentated margin of the wing, and the reddened base of the hind wings of the latter species, and an 
incipient eye-like spot, as in S. ocellatus. 
SPECIES 1—SMERINTHUS OCELLATUS. THE EYED HAWK-MOTH. 
Plate i. fig. 1—3. 
Synonymes.—Sphing ocellatus, Linneus, Donovan, Brit. Ins, vol. | Smerinthus ocellatus, Latreille. Curtis, Brit. Ent. pl. 462. 
8, pl. 269. Albin, pl. 8. Harris, Aurelian, pl. 5, f.a—i. Wilkes, | Wood, Ind. Ent. pl. 4, fig. 7. Duncan, Brit. Moths, pl. 3, fig. 1. 
pl. 24. Sphinx salicis, Hiibner, pl. 15, fig. 23. 
Paonias salicis, Hiibn. (Verz. bek. Schm.) 
This handsome insect varies in the expanse of its wings from 23 to nearly 33 inches. The fore wings are of 
a pale rosy ash colour, variegated with chocolate brown, a large patch internally angulated being placed in the 
middle, and extending to the hind margin; between this and the extremity of the wings are several undulated 
brown bars, and the extremity is also brown, the apex itself being pale. The hind wings are of a fine rose-pink 
colour, gradually shaded off to grey along the margin, and marked near the anal angle with a large black spot, 
in which is a pale blue ocellus, the middle being of a slaty black hue. The fore wings have the posterior margin 
almost entire, with the exception of a rather deep sinus near the hinder angle, giving the wings an angulated 
appearance ; the hind wings are also almost entire, with the anal angle slightly produced. The thorax is marked 
above with a large patch of chocolate brown. 
The caterpillar is very pale green, with the minute tubercles and eight oblique white bars on each side, while 
the spiracles are of a rosy brown colour, and the head is bordered with yellow. It chiefly feeds upon the willow 
and sallow, but is occasionally found on the apple, sloe, peach, and almond. It appears in the autumn, and 
changes to a chrysalis in September, and the moth bursts forth to life at the end of the following May. It is 
widely distributed throughout England, and is by no means rare ; although in Scotland itis very seldom met with. 
SPECIES 2.—SMERINTHUS POPULI. THE POPLAR HAWK-MOTH. 
Plate i. fig. 4—6. 
Synonymes.— Sphinx Populi, Linneus, Haworth, Donovan, /, pl. Smerinthus Populi, Latreille ; Stephens; Wood, Ind. Ent. t. 4, 
241. Albin, pl. 57. Wilkes, pl. 25. Harris, Aurelian, pl. 33, fig. | f. 9. Duncan, Brit. Butt. pl. 3, fig. 2. 
Lavthoé Populi, Fabricius, Leach. 
Polyptychus Populi, Hiibuer ( Verz. bek., Schmet.) 
a—f. | 
The expansion of the wings varies from three to nearly four and one-third inches. They are of a pale lilac-grey, 
with a broad central bar succeeded by several undulated stripes, and the extremity of a greenish-brown, the first 
being much darker towards the hind margin of the wings ; the veins, and especially the oblique vein closing the 
discoidal cell, pale whitish ; the base of the hind wings is broadly ferruginous. All the wings have the apical 
margin almost regularly scolloped, and the anal angle of the hind wings is scarcely produced: the thorax and 
abdomen are entirely of a pale lilacy-grey. The males have the markings of the fore wings generally darker 

