412 Transactions. 
Legs dark with knee-joints and bases of tarsi paler, yellowish. 
Wings (fig. 23) greyish, veins fuscous ; calyptrae grev, fringes fuscous; —— 
costa to apex of fourth vein, the latter ending in tip of wing; penultimate _ 
section of the fourth vein about one-tenth as long as ultimate.  Halteres 
pale yellow. 
Length, 2mm. Female slightly larger than male, but otherwise similar, 
Type in author's collection; reared from mines obtained in Botanical 
Gardens, Wellington. 
Distribution. TE 
„First discovered in Botanical Gardens, Wellington, 22nd June, 1919. — 
Fairy plentiful in Wellington, and has also been found in Wanganui dis- — 
trict. Not yet found in South Island. Imagines appear in October and _ 
November. 
Food-plant. 3 : 
Melicytus ramiflorus (mahoe, whiteywood). ee 
Egg-laying and Larva. e 
Ova laid singly in minute pockets beneath under-cuticle of leaf, E 
_ generally in vicinity of midrib, in distal half of leaf. Ev 
_ Full-grown larva—length, 3 m .; pale green, shiny, darker posteriorly _ 
with touch of yellow ; cylindrical, bluntly rounded caudad, slightly attenu-- 
ated cephalad ; respiratory processes black. Larva undergoes three sta: 
duration of which are not known, but situations of moults in mine are - 
* 
dishes arvae always pupated under cover of leaves, and pupation occurred — : 
e 
The Mine, (Plate 41, figs. 3, 4, 5.) x 
Mine a conspicuous white or pale-green gallery on upper side of leaf. 
Entire mine is close under upper cuticle, first 3cm. or 4 сш. being much | 
mine is about З em. long, colour of fresh mine is pale green, owing to larva — 
mining deeper and thin layer of leaf-substance intervening between mie — 
and cuticle. No discoloration of leaf external to mine. Gallery widens | 
evenly from about 0-5 mm. at start to 3-4 mm. at termination; margins 
are shallowly scalloped ; direction more or less erratic and angulated owing 
m gallery happen to cross first 2 cm. or З cm. they do not anastomose 
ater portion passing beneath earlier. General trend of mine is in long pu 
of leaf, and midrib is rarely crossed except by later portion of mine, an 
from start ; positions of moults easily found by holding leaf up Ec : n 
these casts are found it will be noticed in 1 j icinity there Ì8 
that in immediate vicinity ue 
. less frass than elsewhere, and mine at this point may be slightly enlarged. is 
