Watt. — Leaf -mining Insects of New Zealand. 



459 



covered externally by the thin outer cuticle of the stem. It is somewhat 

 cylindrical in shape, with roimded ends ; average size about 10 mm. by 

 2-5 mm. It forms quite a conspicuous little bulge on the side of the stem, 

 its long axis parallel to that of the stem. 



The Pupa. 

 Of the head-parts, the cephalic plate is about twice as long as broad 

 at its base ; the lateral cornua are represented by two extremely small 

 tubercles, only slightly elevated ; labrum slightly above lower margin of 

 the eyes. All the chief characteristics are the same as in P. panacitorsens. 

 Individual characteristics in the Panax moths are hard to find. The 

 forewings normally extend to the lower border of the fifth abdominal 

 segment, while the third legs reach to the lower border of the seventh, 

 and the antennae to that of the eighth or ninth. Regarding the setae, 



21 ' 22 



Fig. 21. — Head of pupa of P. panacicorticia, ventral view. 

 Fig. 22. — Lateral view. 



these are the same as P. panacitorsens, with the exception that the dorso- 

 lateral seta was present in the second segment ; all three pairs were found 

 in 8 and 9, and 10 bore a small dorsal pair and a larger dorso-lateral 

 seta at the base of each caudal appendage. The lateral ridges are very 

 rudimentary. The dorso-lateral setae in 2-6 inclusive are directed upwards 

 and outwards, that on segment 3 being the longest, and in length about 

 equal to two-thirds the width of the body at that point. Colour golden 

 brown, darker on dorsum of head and thorax and segments 3-6 inclusive. 



Chief Measurements of Pupa. 



