COMPLETION OF LIFE-HISTORY OF MELANARGIA JAPYGIA. 277 



After first moult (forty-five days after) it is G'35 mm. long. The 

 head is green, roughly granular, and studded with whitish hairs, 

 each with a translucent bulbous base. The body is glaucous- 

 green, with olive-brown longitudinal lines ; the medio-dorsal 

 line is clearly defined and bordered by a fine whitish-green line ; 

 the super-spiracular stripe is broad and suffused, darkest along 

 the up})er edge and bordered below by a whitish lateral line ; 

 immediately above the black spiracles is a fine pale green line 

 intersecting the sufl'used band ; there is also a fine sub-dorsal 

 brown line ; above the claspers is a fine brown line. The anal 

 points are whitish. The body is rather densely sprinkled with 

 slightly carved simple brownish hairs with black bases above the 

 spiracles, while those covering the sub-spiracular and ventral 

 surface are whitish with pale bases. The legs and claspers 

 are green. 



Several of those which fed during the autumn survived 

 hibernation and started feeding at the beginning of March, 1913. 

 After feeding occasionally for a few days, the first one fixed 

 itself for the second moult on March 9th, and moulted March 15th. 

 This individual on March 31st (after second moult) measured 

 8*47 mm. long and somewhat stout in proportion, and very 

 similar in all details to the previous stage. The head pale 

 green, deeply pitted with darker green, which gives to the naked 

 eye a rather ochreous-greeu appearance. It rests in a straight 

 attitude, and feeds both by day and night. 



Other examples moulted a second time during latter part of 

 March. The same specimen moulted the third time on April 21st, 

 being thirty-seven days in the third stage. After third moult 

 (seven days after) it measures 15 mm. long. Excepting having 

 paler coloured spiracles, greenish legs, and less prominent points 

 on the head, it is exactly similar in all details to its subsequent 

 stage — i. e. after the fourth and last moult, previously described 

 in this Journal. 



The fourth moult occurred on May 16th, the fourth stage 

 lasting twenty-five days. It became fully grown at the end of 

 May, and pupated during the first week of June. The larval 

 existence extended between ten and eleven months. 



The imago, a fine male, emerged July 4th, the pupal stage 

 occupying a month. In Hungary the normal time of appearance 

 is about the middle of June. The climate of England is entirely 

 different from that of Hungary, the summer being moist and 

 cool instead of very dry and very hot, and the winter moist 

 and warm rather than dry and very cold. Our observations, 

 carried out in this country in 1912 and 1913 on the larvte of 

 siiwarovius, show that the majority of the young larvae hibernate 

 without feeding directly after emergence from the egg, but a few 

 of them after remaining motionless for four or five weeks 

 commenced to feed, moult, and hibernate after the first moult. 



