186 
NORTH AMERICAN NEPTICULIDAE 
white fascia crosses the middle of the wing. Cilia gray. Hind wings gray. 
Body and legs of the same dull blackish color. 
Expanse. — 5.5 mm. 
Locality . — Bear Creek, near Roger’s Pass, British Columbia 
(altitude about 6000 ft.). 
Holotype in writer’s collection. 
One specimen, bred from mines collected on leaves of alder 
(Alnus tenuifolia), August 19, 1915. A short serpentine mine 
abruptly enlarges into a blotch (Fig. 26), which often extends 
across the space between two lateral veins. Cocoon dark brown. 
The mines were observed only in a single locality, although 
common there, some leaves containing as many as a dozen mines. 
36. Nepticula ulmella Braun 
Nepticula ulmella Braun, Journ. Cin. Soc. Nat. Hist., xxi, 87, 1912. 
Palpi creamy white. Tuft ocherous on the face, tinged with red above, and 
sometimes with a few dark brown scales behind. Antennae creamy white, 
broadly banded above with dark brown, so that only a narrow line of the pale 
color appears between the annulations. Eye-caps creamy white. Thorax 
brownish, somewhat peppered. Scales of the fore wing creamy white, shading 
to dark brown at their tips, except where they form a creamy white oblique 
fascia at the middle of the wing. The general color of the fore wing is thus a 
somewhat mottled dark brown. The fascia, beginning at the middle of the 
wing on the costa, reaches the dorsum somewhat behind the middle, and is 
sometimes broken with a few dark-tipped scales. Cilia creamy white. Hind 
wings pale gray, with a pale bluish luster. Legs creamy white. Abdomen 
above gray, beneath pale straw-colored. 
Expanse . — 4 to 5 mm. 
Localities. — Ohio; Kentucky; Pittsburgh, Pennsylvania (Engel) . 
The larvae are miners in leaves of red elm and cork elm {Uhnus 
fulva and U. racemosa). The mine (Fig. 45) starts as a very fine 
brown, or rarely whitish line, not very winding in its early course, 
and at about half its length abruptly enlarging to a breadth of 
1 mm. From thence it continues to increase gradually in width, 
until it attains a breadth slightly in excess of two mm. The 
broad portion of the mine is usually so much contorted that it is 
not possible to trace the course of the mine, the whole having the 
appearance of an irregular blotch. The cocoon is reddish brown. 
Contrary to the usual habit among the American species that I 
have observed, a large proportion of the larvae spin cocoons 
within the mines, generally in the center of the blotch. This is 
