TRIFID.E. 177 



the markings, except the subterminal line, greatly obscured ; 

 this peculiar variation ranges almost from red to grey, and 

 these ground-colours are also found in the same localities 

 associated with great distinctness and intensity of the usual 

 markings. The Eev. W. W. Fleming has obtained extremely 

 dark purple-brown specimens near Waterford, the subterminal 

 line being rich yellow, but the other markings scarcely 

 visible. A curious aberration reared by Mr. W. H. B. 

 Fletcher has the fore wings quite abnormally broad and the 

 transverse lines and stigmata extraordinarily conspicuous. 



On the wing in June and July, and in forward seasons 

 sometimes at the end of May ; occasional specimens of a 

 second generation have been taken in August and September. 



Larva cylindrical, tapering a little toward the head, which 

 is brownish ; on the second segment is a dull brownish plate ; 

 general colour green or yellowish-green, most minutely 

 irrorated with yellowish atoms ; dorsal line indistinct and 

 slightly darker than the ground colour ; subdorsal line some- 

 times absent ; where present it appears as a fine black, 

 rather oblique streak on each segment ; usual raised dots 

 black and arranged in the usual trapezoid form ; spiracular 

 line composed of black fusiform markings, one on each seg- 

 ment, with the white spiracles at their lower edges, brilliantly 

 contrasted by a lateral stripe of bright yellow below j under- 

 surface and feet green. 



There is a variety in which the ground colour is brown 

 or olive-brown, the dorsal line strongly marked as a double 

 dark-brown line vanishing at the hind part of each segment 

 in some, in others running continuously through a dark- 

 brown triangle or diamond on each segment, individuals 

 occurring with either form. The subdorsal line appears as a 

 series of oblique dark brown streaks, each streak commencing 

 a little on one side of the segment in advance, and abruptly 

 terminating on the next; dots black and placed on small 

 yellowish specks ; along the side of each segment is a dark- 



VOL. IV. M 



