172 
NORTH AMERICAN NEPTICULIDAE 
yellowish color. The mines from which the type series was 
reared were collected in jNIarch and produced imagoes in May. 
10. Nepticula rhamnicola Braun 
Xepiicula rhamnicola Braun, Ent. News, xxvii, 56, 1916. 
Syn. rhamnella H Braun (not Herr.-Sch.), Journ. Cin. Soc. Nat. Hist., xxi, 96, 
1912. 
Tuft ocherous in the summer generation, black in the overwintering genera- 
tion. Antennae black narrowly ringed with pale gray, eye-caps creamy buff. 
Thorax creamy buff, patagia dark brown. Fore w’ings browm, the tips of the 
scales blackish. At the basal third of the wing is a cream colored fascia with 
its edges often indented by dark scales. At two-thirds of the wing length is a 
more shining silver}^ fascia. Cilia pale graj", whitish around the apex. Hind 
wdngs and cilia gray. Fore and middle pair of legs ocherous, somewhat shaded 
wuth gray, hind pair predominantly gray. Abdomen browm above, paler 
beneath. 
Expanse. — 4.5 to 5.5 mm. 
Localitij. — Ohio, along little hliami River. 
The mines (Fig. 35) are very common in leaves of Rhamnus 
lanceolata growing along the banks of the little Aliaini River in 
Hamilton and Clermont Counties, Ohio. The egg is deposited 
on the underside of the leaf, and the larva upon hatching makes 
a short contorted mine within a small area, so that its presence is 
indicated from above by a blackish discolored spot on the leaf; 
the mine then extends as a fine line nearl}^ straight for a distance 
of about 1.5 cm.; during this time it is not visible on the upper 
surface of the leaf. The larva then crosses to the upper surface, 
continuing the linear mine for a distance of about 1. 5 cm. further. 
The mine now suddenly expands into a broader tract or blotch, 
and from thence to its end has a width of from 2 to 3 mm. The 
length of the broad tract is about 2 cm. and in it nearly the entire 
leaf substance is consumed. The formation of the blotch occupies 
approximately the last two days of the larval period within the 
mine. Larva bright green; cocoon tawny. 
There are three generations a year; mines are most abundant in 
October. 
This species may be distinguished from its nearest ally, N. 
(Hffasciae, by its whitish thorax. 
1 1 . Nepticula cerea new' species 
Head buff; eye-caps a little paler. Thorax and base of fore wings to just 
beyond one-third, creamy buff. .From the base a few fuscous scales extend 
along the costa to the middle of the pale area, where the,y join a small triangular 
