348 Professor E. B. Poulton on colovr-rclation 



larva unchanged. The other had now also darkened, 

 becoming blackish-grey with paler marks. The larvie 

 were re-fed on May 17th, 21st, and 25th, without further 

 change in appearance. It was noted that they were at rest 

 on the sticks on the 17th and 21st. On May 31st both 

 larvoe were sent to Lord Walsingham. 



Y. The tn:o larger darker quercifolia larvm separated from 

 I on April IGth. 



AjJril 16th. One larva was now blackish-brown with 

 white marks, the other very dark grey with white and 

 brown marks. 



Ajrril 21st. Re-fed. One larva on sticks, 1 on twigs 

 of hawthorn. Appearance unchanged, as also on April 

 23rd and 2Gth, when they were re-fed and both found on 

 sticks. 



May 1st. The dark grey larva had changed skin and 

 become blackish-brown with pale and brown spots. On 

 May 3rd they were re-fed and found unchanged in appear- 

 ance on the sticks. 



May 11th. The larva with pale and brown spots was 

 sent to Lord Walsingham. The remaining larva was at 

 rest on stick, and blackish with two pale marks. It was 

 re-fed on May 17th (on stick) and 25th. On the 31st it 

 was sent to Lord Walsingham. There was no further 

 change in its appearance. 



J. Two uniform quercifolia larvie on hlach ticigs dAtring 

 and after hyher nation. 



April 7th. Re-fed. One larva purplish-brown and black, 

 the other had changed skin and was black with small 

 white patches and minute brown points. Both were resting 

 on twigs and unchanged in appearance when re-fed on 

 the 10th. 



Ap)ril IQtli. Re-fed. Both on twigs. The purplish-brown 

 and black larva appeared to be even darker, the other 

 unchansjed. Both Avere on twiofs and unaltered when 

 re-fed on 21st and 23rd. 



April 26th. The black larva with small white jDatches 

 and minute brown points was dying. 



April 27th. The last-mentioned larva was dead. The 

 other purplish-black larva was at rest on a twig. 



3Iay 1st. The larva bad changed skin, and was black with 



