310 



AMERICAN MICRO- LEP1DOPTERA. 



Mine of L. celtisella. 



fascia in celtisella occupies nearly the same position as the second in 

 celtifoliella. 



This species has been made a synonym of celtifoliella, but an ex- 

 amination of specimens of each and a comparison of the early stages 

 shows that celtisella and celtifoliella are specifically distinct. 

 Food plant, Celtis occidentalis L. 



The larva, of the cylindrical type in the later stages, enters the 

 leaf on the lower surface, and makes a narrow linear mine, then 



cuts through the parenchyma 

 to the upper side, where the 

 mine broadens into an elon- 

 gate blotch, made tent-like by 

 a longitudinal ridge in each 

 epidermis. The larvse eat the 

 entire parenchyma, leaving 

 merely the dark discolored 

 cuticles of the leaf. 

 The mines and imagoes of this species are very abundant. Its 

 range is wide, and probably coincides with that of its food plant. 



Lithocolletis lucetiella Clemens. 



Plate. XXII, Fig. 19. 

 Lithocolletis lucetiella Clemens, Proc. Acad. Nat. Sci. Phil., 319, 322, 1859. Tin. 



No. Am., 65, 73, 1872. Chambers, Can. Ent., iii, 56, 1871. Walsing- 



ham, Ins. Life, ii, 52, 1889. Busck, Proc. Ent. Soc. Wash., 188, 1903. 



Dyar, Bull. 52, U. S. Nat. Mas., 1902, No. 6262. 

 Syn. senigmatella Frey and Boll, Stett. ent. Zeit., xxxiv, 219, 1873. Chambers, 



Cin. Quart. Jn. Sci., i, 210, 1874. 



Antennae, palpi, face and tuft shining white. Thorax and basal half of the 

 forewings shining white. Apical part of the forewings suffused with golden. A 

 golden costal streak from the base, not extending to the middle. At about the 

 middle is a silvery white fascia, broadly margined with golden on its inner side, 

 and with a black spot on the costa internally. This fascia is also sometimes mar- 

 gined internally towards the dorsal margin with a few black scales. In the 

 apical portion of the wing are two white costal streaks; the first margined inter- 

 nally by a black spot; the second near the tip and unmargined. Nearly oppo- 

 site the first costal streak is a large dorsal streak dark margined internally by 

 an oblique black line. Cilia golden around the apex, becoming silvery white 

 toward the tornus. Expanse 6-7 mm. 



The hindwings and cilia are silvery gray. Legs white, first pair shaded with 

 gray. Abdomen dark gray in the male, silvery in the female; anal tuft silvery. 



The mines of this very distinct species are common in the Atlan- 

 tic States on the underside of leaves of Tilia Americana L. The 



