us 



Julv, 



Supplementary Note. 

 After the above was in type, Mr. Fletcher kindly sent me, on 

 June 6th, some cases of C. Olitzella just received from Mr. W. 

 Salvage from Rannoch ; from these the moths emerged June 1 1th to 

 14th. Unfortunately, the larvae had already pupated before they 

 arrived, with the exception of one small one, barely 3 mm. in length ; 

 which was doubtless in its second year, and would not have fed up until 

 next spring. It agreed with the preserved specimens above described 

 except in its colour, which was reddish-orange, partially tinged on the 

 segments with purplish, with the reproductive organs showing through 

 as two dark purplish lozenge-shaped spots on the ninth segment. 

 Perhaps the larva only assumes quite at the last a strongly reddish 

 hue, which those examined by Hofmann had not yet acquired ; and it 

 may be that the preserved larvaa were more orange when alive. As 

 regards the position of the case as carried by the larva, my opinion 

 that the keels must be lateral, and the longer of the two surfaces, 

 which lie between the keels, dorsal, has proved quite correct. 



PUPA. 



On June 8th I extracted a living pupa a few days before emer- 

 gence, and made the following description: — 



Length to end of abdomen, 4'5 mm. Greatest breadth, 1 mm. 



SHn smooth, somewhat shining ; segmental divisions rather well-defined. 



Eyes large, black. AvtenncB cases dark grey, of almost exactly equal length 

 with, and lying next between, the margins of the wing-cases. Head dingy greyish- 

 orange. Thoracic segments dark orange olive-grey. Wing-cases ochreous olive-grey, 

 very long, reaching to within about 0.2 mm. of the extremity of the abdomen, 

 though from the end of the fourth segment df the latter they lie well away from it. 

 Abdomen dorsally greyish-orange, with a large dark greyish internal spot under the 

 posterior part of the third and the anterior part of the fourth abdominal segments, 

 and a similar one under the same parts of the fifth and sixth segments ; the two 

 latter are free. Posterior leg-cases lying with the wing- and antennse-cases, with 

 their extremities projecting between the latter to about 07 mm. beyond the end of 

 the abdomen. 



Dr. Chapman informs me that the way in which the first pair of 

 legs covers a portion of the maxillae, and also of the second pair, is 

 peculiar.— E. K. B. : June 19th, 1896. 



LEAF ROLLING AND THE DRAWING TOGETHER OF LEAVES. 

 BY H. GUARD KNAG&S, M.D., F.L.S. 



Many years have passed since any observations respecting the 

 rationale of this phenomenon have been recorded. The old idea was 



i 



