THE LIFE-CYCLE OF LOBESIA PERMIXTANA, HUB. 27 



rear it had two very distinct lobes. The rear half of the pro- 

 thorax was the same colour as the head ; the front half was much 

 paler. Next the mesothorax are two half-crescents, dark brown 

 in colour, divided in the centre by a thin line of light colour. 

 The segments at the rear of the prothorax are light honey- 

 coloured and very transparent. There is an unusual arrange- 

 ment of colour in the dorsal regions ; this includes the whole of 

 those from and including the rear portion of the prothorax, and 

 all the segments at the rear of it with the exception of the last 

 four. This colour is dark brown, and it is continued to its anal 

 extremity of the same width. 



The tubercles are slightly lighter than the surroundings, but 

 are not prominent. The spiracles are slightly darker than the 

 adjoining area ; they are not conspicuous. The claspers and 

 prolegs are dark fuscous. The ahmentary canal shows as a 

 distinct dark line through the brown dorsal area, but is hardly 

 visible at the rear of it. The anal plate is not noticeable. 



On July 13th the larva was 9 mm. long, apparently still in 

 the third instar ; it was now very similar to when last described, 

 with the exception that the anterior segments were now almost 

 as dark as those in front of them. On this day I put in the cage 

 a dead beech leaf for it to pupate in. A few days afterwards I 

 found that it had neatly folded over a small portion of this leaf, 

 and spun a white silk cocoon in the pocket so formed. I fancy it 

 changed to a pupa a few days afterwards, but as I had only one 

 example, and until it actually emerged I was uncertain whether 

 it was L. ijermixtana or some other species that had deposited its 

 ova on the oak sprays over which I had confined the females, I 

 did not care to take the risk of opening the cocoon and killing 

 the inmate. 



I did open this cocoon on the following 4th of April, and 

 found in it a pale amber-coloured chrysalis. My doubts were set 

 at rest by a fine male L. jjermixtana emerging on May 15th last. 



The larva throughout was one of the most active I have ever 

 seen amongst the Tortricid^, jumping and wriggling about in a 

 most remarkable manner. 



In the last instar I introduced to it a leaf of Golden Kod; this 

 leaf was spun to the only oak-leaf then in the tin in which I kept 

 the larva, but it was not fed upon. It will thus be seen that I 

 have no evidence to offer in support of its feeding upon either 

 this plant, or upon birch, which Dr. Wood found the larvae upon, 

 but my experiments were hardly extensive enough to be con- 

 clusive. 



Youlgreave, South Croydon ; 

 December 9th, 1919. 



