ANNETTE F. BRAUN 
179 
later. The mine (Fig. 37), which may l)est he regarded as a lower 
side mine, is at first much contorted, winding and twisting within 
a small area, causing a brownish discoloration of the surrounding 
leaf. This portion of the mine seems to be formed early in the 
season, and the leaf around it is always dead when further feeding 
is resumed in October, and the larva starts out to mine into the 
fresh green portion of the leaf where the mine is more distinct, due 
to partial eating of the leaf substance. The larva then becomes 
full fed in a week or ten days and leaves the mine to spin a dark 
brown cocoon. The mine is extremely long but measures only 
1 to 1.5 mm. in width at its end. Larva yellow, with a row of 
dark brown dashes along the mid-ventral line. 
This species may be separated from all other species by the 
fact that the wing is purple before the fascia and brown beyond, 
the reverse being true in all other cases where there is a difference 
in color before and Ijehind the fascia. 
23. Nepticula corylifoliella Clemens 
Nepiicula corylifoliella Clemens, Proc. Ent. Soc. Phila., i, 83, 1861; Tin. No. 
Am., 172, 1872: Braun, Journ. Cin. Soc. Nat. Hist., xxi, 91, 1912; Dyar’s 
No. 6193. 
S>m. virginiella Clemens, Proc. Ent. Soc. Phila., i, 83, 1861; Tin. No. Am., 
172, 1872; Braun, Journ. Cin. Soc. Nat. Hist., xxi, 90, 1912; Dyar’s No. 
6225; minimella Chambers, Can. Ent., v, 127, 1873; Dyar’s No. 6203. 
Tuft ocherous to orange-ochraceous. Eye-caps silvery white, sometimes 
shading to fuscous outwardly. Thorax and fore wings bronz}^ brown, with 
blue-purple reflections toward the costa and in the entire apical part of the 
wing beyond the fascia, where the color is then predominantly purple. Some- 
times the purple reflections are entirely lacking proximal to the fascia. The 
fascia is situated just beyond the middle of the wing, rather broad, narrowing 
toward the costa. Cilia silvery-tipped at the apex. Hind vdngs and cilia 
gray, with purple reflections. Legs purplish black, except middle pair and 
tarsi which are silver}'. Abdomen above purple, silvery iridescent beneath. 
Expanse. — 3.5 mm. 
Localities. — Pennsylvania (Clemens); Kentucky (Chambers); 
Ohio; Plummer’s Island, Maiyland (Busck). 
Food plants: hazel {Corylus americana) , hop hornbeam {Os- 
tnja virginiana), hornbeam {Carpinus carolimana) and black 
birch (Betida lenta). The mine (Fig. 40) is a long, very narrow 
winding tract scarceh" broader than the larva, with frass col- 
lected into a central line or dispersed across the mine. Larva 
TR.\XS. AM. ENT. SOC., XLIII. 
