20-l! r Februury, 



the young stage of some Tceniocampa, which he had forgotten, and in 

 this, without closely examining more than the first two segments pro- 

 truding from some leases and portending a moult, I acquiesced ; 

 however, an examination of the larva after the completion of its moult, 

 and further correspondence, soon convinced me it was no Tceniocampa, 

 and reference to a copy which I had by me of Hiibner's figure of 

 D. 00, showed me at once that I had at last obtained an example of 

 that desideratum. 



The moult took place during night or early in the morning of 

 May 22nd, and in course of that morning 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 

 .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 1 inch 4| 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 segments, and from 

 thence much broader on all the others, but on each of them was con- 

 tracted in the middle and divided so as to form a series of long elliptical 

 marks, the very thin sub-dorsal 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 spii'acular stripe 

 of rather yellowish-white was on the third and fourth segments 

 interrupted deeply on its upper margin, aiid 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. 



Just before the larva was allowed to enter the earth it had lost 



