84 DIOYCLA 00. 



I saw the larva feeding well as it lay quite openly 

 exposed to view, though afterwards it kept itself more 

 secluded, both by day and night, amongst the leaves 

 of the oak spray provided for it, but, so far as I could 

 see, without spinning them together, and it became 

 full-grown by the 27th, and went to earth on the 29th ; 

 and the imago, a male, appeared on the 8th of July. 



Very soon after the moult it was nearly an inch 

 long, and when full-grown and stretched out, one inch 

 and four and a half lines in length, very cylindrical, 

 the head being only a trifle less than the second 

 segment, and the thirteenth very little tapered; the 

 head full and rounded, jet-black and glossy ; the 

 ground-colouring of the body was also jet-black above 

 as far as the anal flap, which was brown, and dark 

 brown on the belly ; the plate on the second segment 

 quite as glossy as the head ; the rest of the smooth skin 

 had but a very slight gloss ; a pure white dorsal stripe 

 began rather narrow on the plate and thoracic seg- 

 ments, and from thence much broader on all the others, 

 but on each of them was contracted in the middle and 

 divided so as to form a series of long elliptical marks ; 

 the very thin subdorsal line of pure white began with 

 two isolated spots on the side margin of the neck 

 plate, and thence ran uninterrupted to the end of the 

 anal flap ; the broad spiracular stripe of rather 

 yellowish- white was on the third and fourth segments 

 interrupted deeply on its upper margin, and from them 

 passed along of uniform breadth as far as the anal 

 legs, and having a thin line of dark grey running 

 through the middle, on which were the spiracles of 

 red-brown finely outlined with black ; the very small 

 tubercular dots of pure white ranged in threes on 

 either side of the back, and singly above and below 

 the spiracular region on each segment; the anterior 

 legs were black ; the ventral and anal legs brownish- 

 green and semi-pellucid ; the thoracic wrinkles and 

 segmental divisions showed black upon the white stripes 

 and lines. 



