ISC.l.] 85 



and it is (juite possible that they are tlie work of dipterous hirvao. The 

 mines are reddish-brown after the hirvas leave them. 



11. X. an^uiuclla. May be found in the leaves of oaks early in Octo- 

 ber and in the latter part of June. The mine is a very narrow serpentine 

 tract, irhlcli is jilled Of dhcoloi-cd tliroiKjIioat Its lerifftlt hi/ hidcklsli excrf- 

 mnif. The larva fits the mine closely, in color lemon-yellow, with ten 

 square dark brown or blackish spots on the ventral surface. 



Other mines in thesame leaves have, sometimes, a broad frass line, sprink- 

 led along the middle and often it begins as a slender line and these doubt- 

 less all belong to the same species. 



12. N. platea. Mines oaks early in October. The mine is a moder- 

 ately broad, winding, tract, with a broad line of dispersed grains of excre- 

 ment. The larva is purplish, with a pale green vascular line and a row of 

 reddish-brown dorsal dashes. The mine is much broader than that of the 

 preceding miner. 



lo. N. saginella. Mines oaks early in October. 1 have found the 

 larva abundant in the leaves nf chestnut early in August. The larva 

 makes a transparent, moderately broad, serpentine tract, gradually increas- 

 ing in breadth from the beginning to the end where it is very slightly en- 

 larged, with a central black frass line. It is about a line wide towards the 

 larger end and from twelve to fifteen lines long. In the leaves of Chest- 

 nut the mine is often made along the edge of one of the coarse pointed 

 teeth, running up to the point, whence the enlarged portion is turned in- 

 wards. In this leaf the mines are only twelve lines long. 



The larva is dark bright green, with a darker vascular line; head brown- 

 ish. The body is rather thick, and of nearly uniform diameter. The 

 summer brood leave their mines towards the latter part of August, and in 

 Oaks, I think in July. 



There may be found in Oaks a mine very similar to the above, that is 

 about a line wide towards its larger end, but which is about tiro and a 

 hrdf inches /on;/. And another much narrower than either, which is not 

 much contorted, but nearly straight, running along the veins and midrib 

 and measuring at least font- inches in (em/th. 



14. N. Rostefoliella . In the leaves of Dwarf Wild Hose, Jioso. la- 

 cida, early in September. The mine is very serpentine, frequently running 

 around the edge of the leaf including its teeth, moderately broad, nearly 

 filled with a broad blackish-brown frass line, the grains of which are dis- 

 persed or have a wavy arrangement, in the later part of the mine. In 

 the early ))(ntioii. the tract is filled witli the excrement of the larva. 



