GLUPHISIA CEENATA. 81 



the cuticle of the leaves of poplar, which had then been 

 changed from P. nigra bo fastig lata. 



On the 30th they had moulted the second time and 

 measured 8 mm. in length ; a black dot then became 

 conspicuous on the crown of each lobe of the greenish- 

 white head ; the back was bright green, the subdorsal 

 stripe pale yellow, the rest was as before. 



By the 2nd of September they had grown to be 14 

 mm. long, with the subdorsal stripe primrose-yellow, 

 the back very bright yellow-green, with a very faint, 

 slightly darker dorsal line, the side as far as the trachea 

 (which showed faintly as a rather paler fine thread) was 

 rather bluer-green than the back, and the belly and all 

 the legs were similar, the head rather paler with the 

 black dot on the crown of each lobe very distinct. 



At this time they ate pieces from the edge of the 

 leaves. The skin of the larva was rather glistening, 

 and they seemed to be tender and delicate. 



By the morning of the 5th both had moulted the 

 third time, their colouring being relatively the same as 

 before, but stronger and brighter. On the 11th one 

 measured 19^ mm. and was laid up to moult, the other 

 still feeding ; whenever disturbed in the least it was 

 continually turning the fore part of its body round 

 first on one side and then on the other, bringing itself 

 into the usual position of Acronyda alni when at rest. 



The one laid up to moult moulted the fourth time 

 on the 12th and ate up its cast skin by next morning ; 

 the second moulted the fourth time on the night of the 

 16th or early morning of the 17th and a few hours 

 later ate up its cast skin except the head piece. After 

 moulting the black dots on the crown were not visible 

 until a few hours after the operation, the body remain- 

 ing just the same in colouring as before, but with 

 feeding and consequent growth in four days' time it 

 became 26 mm. long and had dorsal bright rust-red 

 marks on the third and fourth segments and also on the 

 seventh, eighth, ninth, tenth, eleventh, and thirteenth 

 segments ; on all these last-named the mark was that 



VOL. II. 6 



