THE LIFE-HISTORY OF C(ENONYMPH.V TIPHON. 



147 



line than the ground colour ; the spiracular stripe is bordered 

 below by a conspicuous and comparatively broad white stripe. 

 The head is pale yellow-green, granulated, and beset with minute 

 black points ; eye-spots black. The body is sprinkled with black 

 claw-like points similar to the last stage. 



Several moulted second time during first week of September, 

 and entered into hybernation during the latter half of the month, 

 resting on the basal stems of grass. 



After second moult (after hybernation) about one hundred 

 and ninety days old, it is f in. long, which is only a trifle longer 

 than the previous stage, but a good deal stouter. Excepting the 

 stripes, which are bolder, the colouring and pattern are the same 

 as before moulting ; the hook-like points are more developed. 



On March 6th I examined plants upon which the larvse 

 hybernated, and found eighteen had survived the winter ; a few 

 of these were moving slowly about. The following day, being 

 warm and sunny, I noticed three had crawled up the fine Festuca 

 blades, and were eating the extreme tips in the sunshine. They 

 continued feeding through March, usually during the morning 

 when the sun had sufficiently warmed the temperature. 



Most of the larvae moulted third time during March. After 

 third moult, nine months old, it measures ^ in. long. The 

 whole colouring and markings are clearly defined ; the head is 

 clear green, granular, and sprinkled with minute white points ; 

 the body is likewise granular and studded with whitish warts, 

 each bearing a thorn-like point. 



In captivity they feed on various grasses, especially Festuca, 

 which they always eat at the tip, gradually eating it down. In 

 movements they are most sluggish, gliding along in a very slow, 

 slug-like motion. Upon the slightest disturbance they fall from 

 the plant. 



On April 1st the first one fixed itself for the fourth and last 

 moult. 



After fourth and last moult, fully grown, it measures 1 in. 

 long. It is rather slender and slightly attenuated anteriorly, 

 and more so posteriorly. The head is globular, granulated, and 

 covered with extremely minute hair-like points, which develop 

 into whitish hairs in front. The segmental divisions of the 

 body are ill-defined, and each with six subdivisions forming 

 transverse wrinkles. The surface, like the head, is granular, 

 and sprinkled all over with minute whitish warts, each bearing 

 a very minute claw-like point. 



The ground colour is grass-green, striped longitudinally with 

 a very dark velvety green medio-dorsal band, palfist at each end; 

 this is bordered with a fine whitish line ; a subdorsal white 

 stripe tinged with lemon-yellow which terminates in the anal 

 point ; a subspiracular stripe rather whiter ; all the stripes are 

 equidistant. Between the subdorsal and subspiracular stripes 



m2 



