172 LEPIDOPTERA. 



1. P. corylana, Fah. — Expanse of male 4, of female 

 I iuch (18-21 m.m.). Fore wings ochreous yellow ; nervures, 

 edges of the bands, and the hind margin, slenderly dark red. 



Antennaj of the male brownish-white ; palpi white above, 

 pale yellow-brown below ; face roughly white ; head and 

 thorax pale yellow-brown ; abdomen pale brown. Fore wings 

 broad, strongly arched near the base, not folded, truncate 

 behind and the apex pointed ; colour pale ochreous-yellow, 

 with all the nervures slenderly red-brown and the whole 

 surface reticulated by similar cross lines ; basal blotch large, 

 only indicated by its margin — a slender, oblique and nearly 

 straight, dark red line — central band almost parallel, in- 

 dicated by two lines equally slender, dark red ; beyond this 

 is a streak of the same colour from the costa, often continued 

 among the reticulations to the anal angle ; cilia dark red. 

 Hind wings smoky white, with similar cilia. Female a little 

 larger, the face yellow-brown and the colour of the fore wings 

 usually rather deeper. Hind wings smoke colour with the 

 apical portion whiter. 



Usually extremely constant in colour and markings, but 

 in western districts a varietj' sometimes occurs having hardly 

 a trace of the usual markings, but the margins edged with 

 darker red-brown. 



On the wing in July and August. 



Larva grass-green with a darker dorsal vessel ; head spot- 

 less, pale green with an olive tinge above ; dorsal plate grass- 

 green with two small V-like marks in front, two others cres- 

 cent-shaped near the sides, two dots in front of the centre and 

 six more behind ; anal segment opaque, grass-green, coarsely 

 dotted and terminated by a coronet of eight rays. (Wilk.) 



June and July, on oak, hazel, birch, beech, sloe, elm, lime, 

 mountain ash, wild cherrj-, peach, dogwood, and bramble, 

 folding a leaf longitudinally. 



PCPA pale brown clouded on the thorax with chestnut. 

 In the larval habitation. 



