PAPILIONIDiE. — COLIAS. 13 



some specimens this is jet black, in others brownish, and in general the ner- 

 vures whicli pass through it are yellow : the posterior wings are sometimes 

 beautifully iridescent, and the ground colour of the anterior is occasionally of 

 a yellowish tint. 



Var. /?. Plate II.* f. 3. ? .—This variety (which is the Pa. Helice, Haworth) 

 differs from the female solely by having the ground-colour of the wings, as 

 well as the series of irregular dots in the marginal band, yellowish-white. 



Var. y. Very small : with the anterior wings subfalcate, but coloured as in 

 var. a. (Exp. alar. 1 unc. 8 lin.) 



The caterpillar feeds on grasses : it is deep green with a longitudinal white stripe 

 on each side, spotted with yellow and blue : the chrysalis is green, with a 

 yellow line on each side, and black spots on the wing-cases. 



Not uncommon during the autumn, in certain but indeterminate 

 years, in the south of England ; but apparently rare in Cambridge- 

 shire and Norfolk, the southern parts of which counties it appears 

 only to frequent. I have often taken it in Battersea-fields, and at 

 Dover and Brighton : near the last place it appears to occur in the 

 greatest plenty. 



Sp. 4. Hyale. Alis supra pallide stdphureis. Umbo communi 

 ii'igro, Jiavo-maculaio ; anticis utrinque pnncto medio nig-ro, 

 posticis suhtiis lutcis, puncto sesquialtero argentco. (Exp. alar. 

 2 unc. — 2 unc. 2 lin.) 



Papilio Hyale. Linne. — Don. vii. pi. 238, /. 1. S . — Co. Hyale. 

 StepJi. Catal. 



The upper surface of this interesting species is sulphur-yellow or whitish, 

 with a deep black spot in the middle of the anterior wings, and a pale 

 orange spot in the disc of the posterior : the anterior wings have a black 

 border, widest towards the costa, and with an interrupted row of yellowish 

 or whitish spots ; the posterior wings are also bordered in the female, but 

 in the male this border is replaced by one of yellow : the under surface of 

 the anterior wings is whitish-yellow, but not bordered with black ; the tip is 

 orange-yellow, with its outer edge pale red, and a transverse row of dusky 

 spots on its inner : in the centre is a round black spot : the posterior wings are 

 entirely orange-yellow, with a row of dusky reddish spots, towards the mar- 

 gin, and with two silvery spots in the centre, which correspond with the spot 

 in the upper surface, and are bordered with reddish : the wings are all ciliated 

 with yellowish red : the body is yellow : the head and the front of the thorax 

 and the legs are ferruginous : the back dusky : the antenntc reddish. 



The female differs in being whitish. A variety is described by Lewin, in which 

 the wings of the male are whitish, and of the female white. 



The cateqiillar is velvety-green, with two yellowish lateral lines, and black spots 

 on the annuli : it feeds on papilionaceous plants : the chrysalis is grecii, with 

 a yellow lateral line. 



