474 Transactions. 
backwards, and are stouter and farther apart than anterior pair, but, 
like these latter, have black expanded tips; below and lateral to post- 
respiratory processes is a small prominence on either side, and between 
and below these is situated the posterior aperture. 
Average dimension: Length, 1-86 mm. ; greatest transverse diameter, 
1:04 mm ; greatest height, 0-89 mm. 
Duration of pupal period normally eighteen days. Dehiscence similar 
to that of other species already described. 
(16.) Agromyza flavocentralis n. sp. (The Veronica Gallery-fly). 
The Imago. ES 
Male. Eyes dark reddish-brown ; occiput and ocellar triangle black; 
irons lemon-yellow ; area at base of antennae, scape, pedicel, and arista _ 
black, terminal segment orange; clypeus black; proboscis and genae _ 
lemon-yellow, palpi darker; three strong bristles along each orbit (some _ 
specimens possess a fourth weak pair below); ocellar bristles as long аз 
post-verticals. б. 
Thorax black, shining; dorso-lateral margin in front of wing-base — 
yellow, pleura very narrowly yellow on sutures; setulae between dorso- 
centrals long and sparse, forming 3-4 irregular series; anterior two pairs 
of dorso-centrals weaker than the two posterior pairs; scutellum broadly 
yellow in centre from base to apex. | 
Abdomen black; intersegmental incisions showing pale-yellowish when — 
abdomen is distended ; ventro-lateral margin pale-yellowish. ` 
uus ack; apices of femora yellow, first three joints of tarsi darker 
ellow. 
.. Wings (fig. 24) pale-greyish, veins black ; penultimate section of fourth — .- 
vein as long as ultimate section of fifth, penultimate section of fifth venm — 
over one-half as long as ultimate. Halteres yellow. с 
Length, 2-75 mm. Female slightly larger than the male. B 
Type in author's collection ; reared from mines obtained in Botanical 
Gardens, Dunedin. = 
Distribution. E 
Appears to be widely distributed. First found on Mount Egmont, abe 
3, 4,000 ft. (common), January, 1917, and again in April of same pes о 
Has also been found since at Wanganui, Wellington, and Dunedin (common). 3 
Mr. Tapley has sent me mines from Governor’s Bay, and reports it common 
about Christchurch. Mr. C. C. Fenwick secured mines on Milford track ; 
in January, 1921. Imagines may be caught on food-plant throughout E 
summer months. de 
Y. Food-plants. : , ў 
` Veronica salicifolia (koromiko), У. j number of the 
larger-leaved ура о. iko), V. speciosa, and a large ae 
Egg-laying and Larva. р 
Ova laid singly in small pockets beneath under-cuticle of leaf, most 
usually in proximal half. Duration of egg stage possibly not longer de. 
a fortnight under favourable conditions. Egg-pockets soon become e. 
coloured, dark brown to black, and are then very conspicuous ОП both 
suriaces of leaves; they can easily be distinguished from similar spots V. 
caused by blight by the small transparent centre, They are often t0 ™ 
