Warr.—Leaf-mining Insects of New Zealand. 335 
importance of these cannot be — till other species of this and 
closely allied genera have been observ 
The Cocoon. (Plate 27, figs. 3, 4.) 
An oval structure of white silk constructed within blotch-mine. It is 
oa to both roof and floor of mine, over which surfaces the silk is 
not so thickly deposited as elsewhere. Circumference is usually thickly 
j granules. : 
final act of the larva prior to pupating is to prepare a small circular 
trap-door for the time of emergence; this is generally in in floor of cocoon, 
but may sometimes be in roof towards anterior end ; occasionally there 
are two trap-doors, one at either end. The trap-door is kept shut b 
several strands of silk, its average diameter being 1:5 mm. Construction 
of the cocoon occupies three to four days. 
The Pupa. (Plate 30, figs. 1—4.) 
Cylindrical in shape, slightly flattened laterad, extremities ; bluntly 
rounded. Head possesses no specialized structures and is devoid of 
sculpture; labrum well up between eyes; mandibular areas мал а. 
maxillary palpi apparently soa labial palpi either not shown or 
only a minute portion to be seen dire ctly caudad to labrum in a slight 
V between maxillae; maxillae broad above, but much constricted in 
caudal half, extending as far as mid-point of pupa slightly beyond ac 
legs ; have a slight transverse wrinkling; antennae narrow, mee 
mid-line at about their middle and extend to about lower level of seventh 
abdominal segment in female, and as long as forewings in male ; show n 
distinct segmentation. First legs PY all space between antenna тет 
maxillae below eye уез extend not quite so far caudad as maxillae, slight 
transverse wrinkling; second legs occupy short interval between antennae 
and set legs, they do not extend so far caudad as the latter; slight 
transverse wrinkling ; forewings firmly soldered down to ventral wall and 
porri ag Cl half md aspect of pupa, they meet in mid-line below 
antennae and extend as far as lower extremity of eighth gue in female 
and caudal extremity of pupa in male, are sculptured with ra 
transverse rugae; third legs not seen; only a very short iip ot hind- 
wings to be seen dorso-laterally as far as second s segment. Prothorax 
somewhat expanded against antennae but practically lost in mid-third ; 
it eder. two pairs of short setae— one orsal, one lateral. Mesothorax 
either side of caudal extension of mesothorax. Pupal- skin — with 
minute thickenings of cuticle as in larva. d aer minal segments possess 
rie ute setae, segments 4-8 inclusive having one dorsal to spiracle on 
either side and two closely approximated and дабай close against dorsal 
wing-m ; segments 1, 2, and 3 all possess dorsal setae, but wing 
covers ventral pair except in 3 where one of the setae is free; 9 and 10 
possess no setae. On dorsum of all abdominal segments excepting last 
two is slight transverse ridge caudad. Apparently no movement once 
pupal skin has hardened. Spiracles small, circular, dark brown, slightly 
elevated, those of segment 1 overlaid by the dorsal wing-margins. No 
cremaster. Colour of pupa golden brown. Average duration of pupal 
stage about thirty days. 
