ANNETTE F. BRAUN 
1G9 
ami hazel {Corylus americana). The mine (Fig. 13) for the first 3 
or 4 cm. of its length is a very fine linear one, usually closely 
following the midrib or one of the lateral veins; later doubling on 
itself for a short distance before it expands into an irregular pale 
brownish blotch, which may occupy the entire s{)ace between two 
lateral veins. The blotch often olditerates the earlier linear mine. 
Cocoon brownish, usually with an olive green tinge. 
Two generations a year; mines in July and from late August to 
the middle of October, but never common. 
A very distinct species. The mine should not be confused with 
that of .V. ostryaefoUeUa Clemens on hop hornljeam and l)irch, 
which is linear, gradually increasing in breadth throughout. 
5. Nepticula trinotata Braun 
N cptimla trinotata Braun, Can. Ent., xlvi, 18, 1914. 
Palpi very pale ocherous. Tuft ocherous. Antennae fuscous, eye-caps 
whitish. Thorax with deep blue reflections. Fore wings with deep blue re- 
flections in the basal third, velvety black beyond and somewhat irrorated in 
the apical third, the scales here having pale bluish iridescent bases. At the 
basal third on the costa is a white spot of variable size, faintly tinted with 
lilac in some lights. At the apical third there is a costal and an opposite 
dorsal spot, each shining white and larger than the spot at the basal third. 
The costal spot is usually more oblique, its tip extending outwardly beyond 
the opposite dorsal spot. Cilia almost entirely pure white. Hind wings and 
cilia pale silvery gray. Legs pale grayish ocherous, tarsal joints dark tipped. 
Abdomen purplish fuscous above, paler and iridescent beneath in the female . 
Expanse. — 4. .5 to 5 mm. 
Localities. — Cincinnati, Ohio, and vicinity. 
The larvae form blotch mines on Carya cordiformis {Hickoria 
minima) and occasionally on C. ovata. The mine (Fig. 33) is at 
first an extremely narrow linear tract, later suddenly expanding 
into a broader tract, 1 mm. or more in width, which in turn be- 
comes a blotch, varying in width from 3 to 6 mm. The mine is 
almost transparent even in the early linear portion, which thus 
distinguishes it from that of N. juglandifoliella Clemens on 
hickory. This is the large Idotch mine to which Chambers refers®. 
® Psyche, hi, 66, 1880. 
The larva is of a dull grayish color. Cocoon reddish In-own. 
There aiu two generations a year, the mines of the first appear- 
ing during the early part of July and those of the second genera- 
tion at the lieginning of September. 
TR.\XS. .\M. ENT. .SOC., XLIII. 
