LIFE-HISTORY OF EREBIA EPIPHRON. 211 



green line ; a grass-green spiracular band, bordered above by a 

 fine subcutaneous whitish line, and below by a broad and con- 

 spicuous wLite stripe, terminating in the anal point, which is 

 again bordered below by a grass-green band blending into the 

 pale green of the ventral surface. The head is pale ochreous 

 green, marked with brownish pink above the mouth, which is 

 brown. The body is sprinkled with extremely minute dark 

 brown warts, each emitting a tiny whitish spinous hair. The 

 legs and claspers are tinged with pinkish brown. 



Second moult end of third week of August. 



After second moult, forty-five days old, it is 9 mm. long. The 

 head is now light grass-green ; in other respects it is similar in 

 colour and markings to the previous stage. The stripes are 

 strongly defined and conspicuous. 



In this stage they enter into hybernation, gradually becoming 

 less active and feeding at longer intervals between each meal. 

 Hybernation commences during September, usually during the 

 last ten days, and is continued for about five months, i.e. lasting 

 until March. 



During the first week of March, one larva was observed 

 feeding on the tip of a blade of fescue-grass. During this 

 month the larva fed by day, when the sun sufficiently warmed 

 the temperature. 



On March 31st this particular larva, when two hundred and 

 forty days old, had attained a length of exactly 12 mm. All the 

 colours had become richer, and the markings clearly defined ; 

 the lateral stripe pale yellowish white, and the subdorsal stripe 

 white. In all its movements it is very slow and slug-like. 



On April 6th it spun itself up for the third moult, but owing 

 to the continuous cold, sunless weather of the first half of the 

 month, the average day temperature being only about 40°, the 

 larva remained undergoing the change for eight days, moulting 

 on April 14th. 



The following day it fed a little, and again once on the 16th. 

 The next day being warm with sunshine, shade temperature 

 52° to 54°, it fed two or three times. 



After the third and last moult, fully grown, it measures 

 19 mm. long. The head is globular and green, roughly granu- 

 lated, and sprinkled with minute whitish bristles ; mouth parts 

 and eye spots brown and ochreous. 



The body is fusiform, the anal extremity terminating in two 

 points similar to those of Ccenonympha pamphilus in structure, 

 but tinged with dull ochreous instead of pink. The ground colour 

 is grass-green, with a darker green medio-dorsal longitudinal 

 stripe bordered by a whitish green line. It is boldly marked 

 longitudinally with two conspicuous dull white stripes ; the first 

 is subdorsal, bordered on each side by a darker green line ; the 

 second is lateral, and stands out in strong contrast against the 



