4:58 Transactions. 



pupated about the middle of November) ; 2/12/17, many pupae found 

 (these all emerged during January). 



This little moth is attacked a great deal by a hymenopterous parasite 

 at present unidentified. 



Food-plant. 



Nothopanax arhoreum (whauwhaupaku). 



Egg-laying. 



The eggs are laid singly on the bark of the young stems of the food- 

 plant. There appears to be no especially favoured position, except that it 

 has been noticed that the region about the expanded bases of the leaves 

 is rarely chosen, some more or less exposed position on the internode 

 being utilized. A description of the ovum must wait until fresh unhatched 

 ova can be obtained. They should be looked for during the months of 

 January and February. 



The Mine. | 



The mine is a simple gallery throughout. At first about 0'5 mm. in 

 width, it increases gradually to about 3 mm. The general direction is 

 along the young stem in the internodes in its long axis. • On reaching 

 a node where the large expanded base of the leaf-stalk closely embraces 

 the greater part of the stem the mine follows the obstruction a varying 

 distance, eventually turning down into the next internode or retracing 

 its way back in its old internode, turning again in a similar manner on 

 reaching the other extremity. In this way the internodes become more or 

 less occupied by long galleries, while at the nodes the mine may enlarge 

 and quite envelop the stem. Blind branches are rarely found. The 



Fig. 20. — Mine of P. panacicorticis in stem of Nothopanax arhoreum. 

 (Two-thirds natural size.) 



mine may at times become somewhat tortuous, and in places more or less 

 expanded oMang to several parts intercommunicating. As a general rule 

 but one internode will be occupied by any one mine, though sometimes a 

 mine may extend -into two. Where two mines are occupying the rather 

 small area offered by a single internode, their galleries may intermingle 

 indiscriminately without any attempt at mutual avoidance. Such crowding 

 is rarely found. The colour of the mine at first is white, and later 

 white or a very pale brown ; it is most conspicuous. The frass is scanty, 

 and in the earlier portions of the mine occupies a narrow central line in the 

 gallery. Details of the larva are reserved for a future monograph. 



The Cocoon. 



This structure is built in the terminal portion of the mine somewhere 

 in the internode, very rarely against the base of the leaf -stalk. It is 

 constructed of white silk, but is very thin, almost transparent, and is 



