DRTMONIA CHAONIA. 157 



DRYMONIA CHAONIA. 



Plate XXXIV, fig. 3. 



Mr. Buckler figured this species June 19th, 1861 ; 

 June 18th and 23rd, 1863 ; July 3rd, 1871, and bred 

 the moth May 1st, 1872 ; the food of the larva in each 

 case was oak. 



I used occasionally to find the pupa, and oftener to 



beat one or two larvae from oak trees ; I find all my 



recorded dates of the emergence of the imago lie 



between April 11th aud 30th ; my dates of the capture 



of the larva vary from May 9th to June 25th. In 1886 



Mr. Bignell sent me a pupa July 14th ; and he sent 



me a small larva July 17th, which continued to feed 



for just a month, but died without changing. When 



first received it was 12 mm. long, and except that it 



was slender in figure, had much of the adult appearance ; 



it moulted July 23rd and ate the old skin ; it moulted 



again August 3rd, when about 20 mm. long ; it grew to 



be about 35 mm. long, of even bulk nearly throughout, 



but tapering a little behind ; the head sloped forward, 



somewhat rounded, the skin wrinkled with six folds in 



each segment, the front fold being the widest ; the 



colour of the back blue-green, through which ran two 



opaque yellow lines ; at the subdorsal level a row of 



irregular yellow spots (when smaller the subdorsal line 



was continuous, and the pulsating dorsal vessel could 



be seen). Above the spiracles a strong yellow line, on 



its lower edge the pinkish spiracles ringed with black, 



aud each followed by a white spot; in segments 2 — 4 



this supra- spiracular line has a little pink tinge, and 



in 13 it runs round the anal flap ; the head pale green, 



rather shining; the belly wrinkled, glaucous green. 



The cocoons I found were not distinguishable by me 



from those of D. dodoncea ; those taken from fine dry 



soil in the angles of the roots of oak trees were of 



regular outline, tough in fabric, covered evenly with 



bits of earth. Mr. W. H. Harwood tells me he knows 



