486 Transactions. 
the same fly as has been quoted from time to time by T. W. Kirk in 
N.Z. Journal of Agriculture. Owing to several inaccuracies in the 
paper, it has been found necessary to review it and bring it into line w 
the present series. The following account entirely supersedes the. 
article. 
. albiceps is attacked by several small hymenopterous parasites, fi 
90 per cent. of the larvae perishing from this cause. All the parasites t 
have emerged in the breeding-jars from this and other leaf-mining 
are being carefully preserved, with notes on their life-histories, and 
dealt with in à separate paper. 
serles of fine hairs uses the whole length of the front; : 
post-vertical bristles about equal, and much weaker than inner 
verticals. 
Thorax dark grey ; four pairs of dorso-centrals with rarely 
between them, two anterior pairs are weaker than the posterior, ғ 
setulae that may be present are situated between the former. . 
dark grey, with four strong les 
_ Abdomen dorsally dark grey with narrow pale-green inte 
me ; Sides pale green ; under-surface dark grey with green inte 
es. 
Legs dark grey to black; femero-tibial joints yellowis sh. 
Wings (fig. 29) colourless, bases yellowish, veins dark grey 
pale lemon-yellow. 
L 2 mm. ; wing, 25mm, Male similar to female but si 
smaller—length, 1:5 mm. ; wing, 1-75 mm 
Food-plants. 
The common sow-thistle (Sonchus asper) also on 8. o 
S. arvensis ; Scotch thistle ; dandelion ; nettle; Cape weed (С 
calendu lacea) ; common groundsel (Senecio aris) ; 
and E. praenanthoides ; dahlia; large cultivated daisy ; andi 2881 
т cineraria, chrysanthemum, marguerite, Melilotus, Noogoora ‘pur 
Distribution. 
— common throughout New Zealand; has been 1 
marina, Wanganui, Wellington, Christchurch, 
Ovum, Egg-laying, and Larva. 
lindrical, pearly-white, gl ends rounded 
deliéate, тв г devoid of any kind of pu The micro 
slightly broader than its its nadir. 
Length, 0-32 mm ; greatest diameter, 0-1 T 
The female fly appears to deposit her ova = both surfaces ag 
of the food-plant. Close observations show that the ч" 
