476 : Transactions. 
^ "From an examination of the mines it would appear that there isa _ 
distinet variety of this fly, for the following constant type has often been E. 
found. Mine a rapidly-widening pear-shaped gallery (see Plate 40, fig. 5), _ ; 
very dark coloured at apex and in central portion and pale along margins. an 
Frass deposited in central line only, except in very early part, where there — 
is tendency for it to be in two rows. “ Herring-boning ” occurs transversely 
across mine in close outwardly convex curves. Margin of mine slightly 
The Pupa. (Figs. 13, 14.) 
After emerging from the mine, larva pupates on or near ground ; in 
breeding-jars larvae never penetrated beneath surface of sand. Pupa 18 
pale amber in colour; dorsal outline well rounded ; segments moderately 
rounded, shiny, unsculptured, possessing microscopic spines cephalo-laterad, 
slightly produced cephalad in mid-dorsal line. Antero-lateral “ shoulder” 
not well developed. Anterior spiracles short, black, and relatively ck 
together; posterior stout, black, on strong tubercles, and relatively wide 
apart. Posterior ventro-lateral tubercles well marked. Anal aperture 0n 
a small elevation ventrad. D 
Average dimensions : Length, 2-41 mm. ; greatest ventro-dorsal diameter, 
"17 mm. ; greatest transverse diameter, 1:21 mm. Eon 
Duration of pupal stage: The following dates are from my field- 
book: Larvae pupated 6th January emerged 30th January = 24.days; — 
(17.) Agromyza umbrosa n. sp. (The Small Veronica Gallery-fly).. 
The Imago. a 
Male. Frons and genae green-yellowish, covered with a minute . 
pubescence ; eyes dark-reddish ; occiput, ocellar triangle, antennae, 
palpi black ; each orbit with four strong bristles, the lower two converg 
, across the face, the upper two erect; ocellar bristles as long аз OF x 
tergites greenish 5 sides yellowish-green ; under-surface dark 
yellowish-green intersegmental regions. 
Legs entirely black. 
