ANNETTE F. BRAUN 
183 
Larvae in serpentine mines on the upper side of leaves of bass- 
wood {Tilia americano) ; the mine (Fig. 41) is characterized by 
the tendency toward a spiral form, with either the early or later 
portion inside; and the frequency of angular turns. Cocoon 
brownish red. 
Two generations; full grown larvae in early July and late 
August. 
The pure white fascia and the white cilia against which the 
outermost row of black scales is sharply defined, distinguish this 
species. 
30. Nepticula rubifoliella Clemens 
Nepticula rubifoliella Clemens, Proc. Acad. Xat. Sci. Phila., 1860, 214; Tin. 
No. Am., 152, 1872; Busck, Proc. Ent. Soc. Wash., v, 208, 1903; Dyar’s 
No. 6219. 
Head ocherous; eye-caps silvery white. Thora.x and fore wings almost 
black, with a shining silvery or faintly golden fascia at the middle of the wing; 
the fascia is convex outwardly and somewhat narrowed in its middle, some- 
times almost interrupted. Cilia whitish, so that the marginal line of scales is 
defined. Hind wings and cilia graj'. Legs silvery as is also the underside of 
the abdomen. 
Expanse . — 4 mm. 
Localities . — Pennsylvania (Clemens) ; Ohio ; Kentucky. 
The larvae mine leaves of blackberry, forming at first very 
narrow^ linear mines, which closely follow a vein or the margin of 
the leaf before enlarging into an irregular blotch (Fig. 23). 
Alines containing larvae may be collected in July and Septem- 
ber. Larva pale green; cocoon dark brown. 
31. Nepticula nyssaefoliella Chambers 
Nepticula nyssaefoliella Chambers, Psyche, iii, 66, 1880; Braun, Ent. News, 
XX, 429, 1909; Dyar’s No. 6206. 
Tuft ochraceous; eye-caps shining white. Thorax and fore wings black 
with very faint purple reflections. In the middle of the wing is a shining 
silvery or pale golden fascia, slightly convex outwardly. Cilia around the 
apex white, with marginal line of scales defined. Hind wings pale gray, with 
an oval patch of androconia in the male. Legs silvery gray. Abdomen pur- 
plish, silvery beneath in the male. 
Expanse. — 4.5 to 6 mm. 
Localities . — Kentucky (Chambers) ; Ohio; North Carolina. 
The larvae mine leaves of sour gum (Xijssa sylvatica), forming 
narrow linear mines which abruptl}' enlarge into blotches (Fig. 
24), measuring 2 cm. or more in length, with an average width of 
TR.\NS. .\M. ENT. SOC., XLIII. 
