Watt. — Leaf-mining Insects of 'New Zealand. 



457 



Chief Measurements of Pupa. 



■ Dehiscence. 



The pupa pierces the prepared window at the head of the cocoon on the 

 upper surface of the leaf. All details as to splitting are identical with 

 those of P. panacitorsens, and so need not be repeated. 



(5.) Parectopa panacicorticis n. sp. (The Panax Bark Moth). (Plate XXX, 



fig. 5.) 



The Imago. 



?. 7.-8 mm. Head and thorax dark grey irrorated with white ; palpi 

 white with apex of second joint and subapical ring of terminal joint black ; 

 antennae grey-blackish, whitish towards apex ; abdomen dark grey above, 

 white beneath ; legs white with black rings. Forewings dark grey to black, 

 densely irrorated with white ; a series of short, outwardly-oblique white 

 marks on costa, three before | ; at |, f , and f a larger wedge-shaped spot 

 of white with a smaller one on its outer side ; a narrow line of black 

 separates the white apical spot from an indistinct band of white on its 

 inner side : a small conspicuous white triangular area on dorsum at |, 

 a small white spot at f and another at | ; cilia white at apex, elsewhere 

 grey. Hindwings and cilia dark grey. 



In male the wing-expanse is shorter, about 6 mm. ; the white markings 

 are more conspicuous, those on costa at | and f especially so ; the ventral 

 surface of the abdomen is whitish tinged with grey. 



This species approaches P. aethalota Meyr. very closely. I have never 

 seen it on the wing, all my specimens being reared from pupae. 



Distribution. 



It is quite common on Mount Egmont at an altitude of 3,000 ft., and 

 is plentiful in the vicinity of the Mountain House and down the mountain 

 track. I have also found it at Dunedin in the bush behind the Botanical 

 Gardens, and more plentifully in the Bush Reserve on Flagstaff Hill. 

 Several old mines have been found at Aberfeldy, in the Wanganui district. 

 The following dates give some idea as to the time of its appearance, &c. : 

 Egmont— 10/1/17, pupae found ; 21/4/17, young larva ; 23/12/17, many 

 pupae obtained. Dunedin — 20/17/19, a few young larvae found (these 



