AND THEIR TRANSFORJIATIONS. 259 



slightly curved upwards, with the terminal joint as long as, but slenderer than, the preceding. Mr. Stephens 



divides the species into the following sections : — 



A. Posterior wings without a scaly lobe on the abdominal ray. 

 a. Fore wings broad, deeply cleft, and pale-coloured. 



Species 1. — Pterophorus pentadactylus — (Linnaeus; Harris, Aurelian, pi. 1, fig. o — q ; Donovan, 4, pi. 

 110; Wood, fig. 1626; and our Plate CXXIII., Fig. 2) — Expands 12 to 15 lines; all the wings snow- 

 white, and satiny. The caterpillar is greenish-white, with dusky dots, with a white line on the back, and an 

 ochreous lateral one ; it feeds on nettles, and the moth appears in June and July. 



Species 2. — Pterophorus spilodactylos — (Curtis, Brit. Ent., pi. 161 ; Wood, fig. 1627) — Expands 11 

 lines ; fore wings obtuse at the tips, with the base and costa pale brown, with an oblique interrupted brown 

 streak in the middle of the wing, and each plume of the fore wings with several paler spots near the tip ; hind 

 wings pale brown, varied with white. Taken, in Jul)', on the Coast of Dorsetshire, and in Suffolk, near 

 Mildenball. 



Species 3. — Pterophorus galactgdactylu.s'^ — (Hiibner, &c. ; Wood, fig. 1628; and our Plate CXXIII., 

 Fig. 4) — Expands 11 to Hi lines ; fore wings sub-acute at the tips, whitish, with a geminated brown spot at 

 the origin of the cleft, a larger one beyond on the costa, with an opposite one on the inner margin, and two minute 

 darker sub-apical ones ; hind wings whitish, with a faint dot at the tip of each lobe. The caterpillar is light 

 green and hairy, and feeds on the burdock. (H. Doubleday, in Entomologist, p. 356.) Rare, but widely 

 dispersed ; appearing about the beginning of June. 



b Synonyme. — Alucita albodactyla, Fabricius ? 

 b Fore wings narrow, deeply cleft, and acute, generally without any distinct markings. 



Species 4.- — Pterophorus biptjnctidactyltjs — (Villers, &c. ; Wood, fig. 1629 ; and our Plate CXXIII., 

 Fig. 5) — Expands 11 to 12 lines ; fore wings ashy, with a black dot at the base, and two at the origin of the 

 cleft, and a dusky streak on the costa and inner margin ; hind wings and fringe rusty-brown. In woods, in June 

 and July. 



Species 5. — Pterophorus fuscodactyltis — (Villers, &c. ; Wood, fig. 1630 ; and our Plate CXXIII., 

 Fig. 6) — Expands 10 to 11^ lines; fore vsdngs darker or lighter testaceous brown, with a faintly darker dot at 

 the origin of the cleft ; hind wings brown. Common in woods and gardens, in June and July. 



Species 6. — Pterophorus pterodactylus <^ — (Linnajus, &c. ; Harris, Aurelian, pi. 30, fig. i-1. ; Wood, 

 fig. 1631 ; and our Plate CXXIII., Figs. 7, 8, 9) — Expands II to I3| lines ; fore wings varying in colour 

 from whitish, hoary, reddish, or testaceous red, and slightly atomose, with a brown dot near the base of the 

 cleft ; hind wings brown. Common in woods, gardens, &c., towards the end of the summer. The caterpillar 

 feeds on the thistle, and when full fed, fixes the extremity of its body to a piece of stick, with the head 

 upwards, jerking itself backwards, so as entirely to reverse its position for a short time when disturbed. 



' Synonvme. — PhalcEJia didactyla, Berkenhout ; Stewart. 



Species 7- — Pterophorus monodactylus — (Linnaeus, &c. ; Wood, fig. 1632 ; and our Plate CXXIII., 

 Fig. 10) — Expands 9^ lines ; fore wings hoary, retuse, with the cleft not very conspicuous ; hind wings brown, 

 three-cleft. Taken in the Kent and Surrey Woods, in June. 



L l2 



