ANNETTE F. BRAUN 
191 
Its paler color, with absence of j^urple, narrow wings and 
smaller size separate this species from Xepticula pomivorella. It 
is apparentl}^ confined to pear as a food plant, as ap])le trees, 
adjacent to pear trees covered with the mines, are entirely free 
from them. 
44. Nepticula flavipedella Braun 
Xepticula flavipedella Braun, Can. Ent., xlvi, 19, 1914. 
Pali)i whiti.sh. Tuft u.sually dark brown, collar creann’ white; rarely the 
tuft i.s reddish ocherous on the face, broun on the verte.x. Antennae fu.scou.s, 
eye-caps creamy \\hite. Thorax dark puridish brown. Fore wings dark 
brown, with dark blue and f)urple reflections; cilia with silvery tips. Hind 
wings and cilia gray. Fore legs, except the femora, dark brown; middle legs 
pale silvery, tarsi pale ocherous; hind legs silvery, tibiae dark brown, tarsi 
pale ocherous. Abdomen dark purplish above, paler beneath in the female. 
Expanse. — 3.5 to 4.5 mm. 
Locahties. — Ohio; Kentucky. 
The mine (Fig. 48) is a very characteristic linear tract, occurring 
most commonly on pin and swamp white oak, but occasionally 
on other species of oak. The egg is placed on the upper side of 
the leaf and the larva for the first few millimeters mines near 
the upper surface, making a very narrow indistinct mine. Then 
the mine abruptly enlarges slightly and for a length of 8 or 9 mm., 
the leaf substance is entirely consumed and the mine rendered 
transparent. Then follows another enlargement, and the mine, 
often much contorted, increases very graduall.y in breadth to the 
end where it measures 2 mm. across. This latter portion of the 
mine is not trans]3arent, but the mine is distinctly visible. The 
frass is sprinkled in separate grains across the breadth of the mine. 
The figure shows the appearance of the mine when held toward 
the light. 
There are three generations a year; mines can be collected 
during early June, the latter half of July, and the early part of 
September. The larva is usually green, occasionally purplish, 
and escapes from the mine through the lower surface of the leaf. 
The cocoon is almost white. 
Though very distinct in larval work, this species in the imag- 
inal state is almost indistinguishable from N. castaneaefoliella. 
The yellowish middle and hind tarsi and the deeper purple 
suffusion of the fore wings are, however, constant differences. 
TR.4NS. A.M. ENT. SOC., XLIII. 
