1863.] 
11 
The costal vein is simple; often there is a narrow intercostal cell be¬ 
tween the costal and subcostal veins at the base of the wing. Most 
frequently the subcostal vein is bifid about its apical third, rarely the 
subcostal vein is simple. The median vein is 3-branched and nearly 
always the two upper or superior branches arise from a common stalk, 
or from one point. The discal cell is sometimes closed, when it gives 
rise to a single nervule; sometimes unclosed, when there is a single 
free discal nervule or none. When the subcostal vein is simple, there 
are two discal nervides. 
Fore wings oblong or elongate, pointed or obscurely pointed. The 
apical nervule of the subcostal vein is usually furcate and terminates 
in the costa before the apex and below it are five veins from the pos¬ 
terior end of the discal cell. Sometimes the apical vein is trifid. 
Head smooth. With or without ocelli. Antennae with joints thick¬ 
ly set. Labial palpi moderately long, or long, refiexed; the second 
joint beneath slightly broader than the basal joint, with appressed 
scales, hardly resembling a brush, sometimes quite smooth; the termi¬ 
nal joint slender, almost needle-like, smooth and pointed. Maxillary 
palpi very short. Tongue of moderate length, clothed with scales. 
This genus is of great extent and comprises a considerable diversity 
of species. The imago is extremely active. 
The habits of the larva3 are extremely varied, feeding upon leaves 
fiower-buds, young shoots, in the interior of grains and seeds. The 
species that feed in buds and shoots are mostly in the larva-state in 
spring and the beginning of summer; those that feed in and upon 
leaves are met with in summer and autumn and those that feed on 
seeds do so in the autumn and winter. 
Gr. nigratomella. —Fore v/ings shining white. The ai^ieal portion of the wing 
is pale brown and contains an oblique white streak margined internally, on the 
costa, with dark brown. Beneath the tip is a small black spot, towards which 
the oblique white streak is directed. Along the costa, between the tip and the 
costal end of the white streak, are two or three white spots and the cilia of the 
apex of the wing are touched with dark brown. On the middle of the costa is ' 
a short oblique, dark brown streak. Hind wings and cilia a little darker than 
the fore wings. 
Antennae pale yellowish. Head and face whitish.. Labial pal23i, second joint 
fuscous externally except at the extreme tip where it is white,- terminal joint 
white with a dark external fuscous line. 
G. medioiuscella.— Fore wings very pale yellowish, with a dark brown spot 
along the costa, extending from near the basal third of the wing to the fold, ob¬ 
lique on its internal edge. At its angle on the fold is a blackish-brown dot and 
/ 
