28 Lloyd's natural history. 



Hesperia sylvaiius^ Latreille, Enc. Method, ix. p. 770, no. 117 



(1823); Newman, Brit. Butterflies, p. 172 (1881); Lang, 



Butterflies Eur. p. 352, pi. 82, fig. i (1884); Barrett, 



Lepid. Brit. Isl. i. p. 294, pi. 39, figs, i, 1^-^(1893). 



Pamphila sylva?iHS, Stephens, 111. Brit. Ent. Haust. i. p. loi 



(1828); Kirby, Eur. Butterflies and Moths, p. 65, pi. 15, 



fig. 13 (1879); Buckler, Larvae of Brit. Lepid. i. pp. 141, 



196, pi. 17, fig. 4 (1886). 



This species, which is of about the same size as Erymiis 



comma, is greenish-brown, with large fulvous markings. On 



the fore-wings this colour is much extended, the greater part 



of the cell, and the portion of the wing above and below 



being fulvous, clouded with brown at the base, and (in the 



male) separated by an oblique black streak of raised scales 



running up to the outer part of the cell from an oblique band 



on the disc. This, beyond the cell, turns inwards along the 



costa, where it is cut by the nervures. In the female the black 



bar is absent, but the fulvous band on the disc is continued 



upwards, being separated from the costa by a broad brown 



curved band running from the costa round the end of the cell, 



but not continued further. On the hind-wings the centre is 



fulvous, clouded with brown at the end of the cell, and all the 



borders are broadly brown. The under side is greenish ; the 



hind-wings are tinged with tawny at the anal angle, and there 



are several indistinct pale yellowish spots scattered over the 



wings. 



The larva is dull green, with a dark dorsal line, and dotted 

 with black. There are snow-white transverse spots on the 

 tenth and eleventh segments beneath. The head is brown. It 

 feeds on various grasses, especially Holcus lanatus and Triii 

 cum repeats in April, the Butterfly, which is double-brooded, ap- 

 pearing from May to August. The pupa is long, and pale brown, 

 formed among grass-blades folded together, and lined with silk. 



