Insects Injurious to the Ajiyle. 



103 



IIeferences. 



(1) Stainton, H. T. 'Natural History of the Tineina,' vol. I., pp. 20«~214. 



PI. v., Fig 3 (1855). 



(2) Theobald, F. V. Report on Economic Zoology for the year ending 



April 1st, 1907, p. 28 (1907). 



THE APPLE LEAF-BLISTER MOTH. 



{Ornix pciiolella. Sta.) 



Amongst several specimens of apple leaves sent dnring the year 

 1907 damaged by mining larva?, some were found to be attacked 

 by the little Tineid known as O^mix petiolcUa. The mine formed by 

 this species is a rough blotch, like that of the nut species (Fig. 201), 



Horace Kni<jht. 



petiolella. 



and is on the upper surface of the leaf. The larva found in these 

 blisters is greyish-green to olive green in colour, the third to tenth 

 segments have six pale spots, four in a row in front and two behind ; 

 from these arise short stiff hairs. In length, the larvte may reach 

 7 ' 5 mm. They are found in June and again in September. When 

 mature the larva leaves the blister and spins the two sides of the 

 leaf together, which forms a nest over h inch in length (Stainton 

 (2) says an inch) ; within this the larva, which finally assumes an 

 orange-yellow hue, spins a dull yellowish cocoon. 



The moth first appears in May. Its wing expanse is from 10 

 to 12 mm. The front wings are deep brownish-grey ; on the costa 

 are seven or eight white patches, and on the inner edge also are 

 some whitish markings ; the fringe has two external thin black lines 

 from the costa to the anal angle. Posterior wings grey with long 



