Lepidoptera oe New York and Neighboring States 95 



and fore wings ocherous, the extreme edge of the costa near the base purplish fuscous, 

 and a broad, purplish fuscous band at the apex of the wing. The cilia, beyond 

 this band, pale ocherous, giving the appearance of an ocherous apex preceded 

 by a dark band. Cilia opposite the ends of the band concolorous with it. 3.5 to 

 4.5 mm. 



Pennsylvania ; Ohio ; Kentucky. 



The mines occur on several species of hawapple. The mine is comparatively 

 short, rapidly increasing in diameter and measuring about 2 mm. in width in 

 the later part of its course. 



There are two generations a year. Larvae may be collected in early July and 

 at the beginning of September. 



This species is distinguished from all others with yellowish ground color by 

 its entire absence of dusting. The much broader mine and bright green larva 

 distinguish it, in its early stages, from N. scintillans. 



42. Nepticula nigriverticella Chambers. Face ochraceous, tuft above dark brown; 

 collar and eye-caps pale ocherous, antennal stalk fuscous. Thorax and fore 

 wings pale ocherous, dusted with purplish black scales. At the base of the 

 dorsal margin a purplish black spot extending halfway across the wing, and 

 occasionally, as a narrow line, reaching the costa, which is often dark brown 

 near the base. At the beginning of the. cilia a broad, purplish-black fascia; 

 beyond it cilia pale ocherous. 5 mm. 



Kentucky; Ohio; Texas. 



43. Nepticula populetorum Frey and Boll. Tuft ocherous, becoming dark brown 

 behind. Collar and eye -caps pale creamy. Thorax and. fore wings buff or 

 pale ocherous, more or less densely dusted with purplish fuscous scales. These 

 scales form a purplish fuscous fascia at the beginning of the cilia. Cilia pale 

 gray, whitish around apex. 5 mm. 



Texas; Ohio; Kentucky; California. 



The larvae mine the leaves of several species of poplar, commonly the leaves 

 of cottonwood (Populus deltoides) . The mine is indiscriminately placed on the 

 upper or the lower side of the leaf. It is whitish, gradually broadening, linear 

 track, 2 to 2.5 mm. in width at its extremity. 



This species differs from the preceding in the absence of the dark spot at the 

 base of the dorsum. 



44. Nepticula saginella Clemens. Face ocherous or pale buff, head, above, dark 

 brown; collar and eye-caps pale ocherous. Thorax and fore wings pale ocherous, 

 huffish, or even whitish, and dusted with fuscous scales, often more densely 

 dusted toward the outer half of the wing, where the dark scales are either evenly 

 distributed or collected into spots, but never form a band. Cilia pale ocherous. 

 4 to 5.5 mm. 



The mine (fig. 60) is a whitish, linear tract on various species of oaks and on 

 chestnut; it varies in length and width, but is usually about 1.5 to 2 mm. wide 

 at its extremity. The larvae are found from June to October. 



45. Nepticula pallida Braun. Tuft ocherous; the scales on the vertex tipped 

 with orange; antennae pale ocherous, eye-caps whitish. Fore wings very pale buff, 

 evenly dusted with purplish gray, a little more densely toward the apex of the 

 wing. Cilia very pale buff. 4 mm. 



Cedar Point, Ohio. 



The food plant of N. pallida is willow, Salix sp. The mine (fig. 58) is made 

 on the lower side of the leaf and is extremely narrow at first, extending along 

 the midrib, later doubling on itself once or twice, and gradually and evenly 

 increasing in breadth to its end, where it measures a scant 1.5 mm. across. The 

 entire length of the mine is approximately 4.5 cm. 



The pale head distinguishes this species from N. saginella. 



In addition to the above species, there are several species, namely N. amelanchi- 

 erella, N. anguinella and N. platea, which are still known only in the larval 

 state. Their mines are described in the Synopsis of species by food plants. 



