342 AMERICAN MICRO-LEPIDOPTERA. 



liithocolletis guttifinitella Clemens. 

 Plate XXIV, Fig. 6. 



Lithocolletis guttifiniteUa Clemens, Proc. Acad. Nat. Sci. Phil., 324, 1859. — Tin. No. 



Am., 65. 76, 1872.— Chambers, Can. Ent., iii, 110, 1871.— Cin. Quart. 



Jn. Sci.,'i, 201, 1874.— Bull. Geol. Surv. Terr., iv, 102, 1878.— Jn. Cin. 



Soc. Nat. Hist., ii, 82, 1879.— Busck, Proc. Ent. Soc. Wash., v, 189, 



1903.— Dyar, Bull. 52, U. S. Nat. Mus., 1902, No. 6306. 

 Syn. toxicodendri Frey and Boll, Stett. ent. Zeit., xxxix, 273, 1878. — Dyar. Bull. 



52, U. S. Nat. Mus., 1902, No. 6304. 



"Front silvery, with a reddish hue. Tuft and thorax reddish orange. An- 

 tennse blackish brown. Forewings rather deep reddish orange, with two silvery 

 bands black margined behind, one in the middle of the wing and nearly straight, 

 the other midway between this and the base of the wing and obliquely placed. 

 Before the costo-apical cilia is a costal silvery spot, black margined on both sides, 

 with an opposite dorsal spot, black margined behind. The apical portion of the 

 wing is dusted with blackish, dispersed scales, with a white spot near the tip 

 above the middle of the wing. Thei'e are two hinder marginal lines, one the 

 margin of the dispersed scales, the other dark brownish in the cilia. 



"The larva may be taken in August and September in the leaf of Rhus toxico- 

 dendron (poison oak), njining the upper surface in a rather broad, tortuous tract, 

 and there are ordinarily several in the same leaf. The larva belongs to the sec- 

 ond larval group. The head is a fine pale brown ; the body yellowish posteriorly, 

 becoming brownish above, with dorsal and ventral dark maculai. The cocoon is 

 circular, formed within the mine as usual in this group in a little circular de- 

 pression." 



The above is Clemens' description of imago and larva. Mr. 

 August Busck (Proc. Ent. Soc. Wash., v, 189, 1903) has established 

 the synonomy of this species with Lithocolletis toxicodendri Frey 

 and Boll, and added important notes upon the variability of the 

 species. The expanse is 7 mm. 



liithocolletis obstrivtella Clemens. 

 Plate XXIV, Fig. 7. 



Lithocolletix ohstrictella Clemens, Proc. Acad. Nat. Sci. Phil., 322, 1859. — Tin. No. 



Am., 64, 73, 1872.— Chambers, Can. Ent., iii, 183, 1871.— Bull. Geol. 



Surv. Terr., iv, 102, 1878.— Dyar, Bull. 52, U. S. Nat. Mus., 1902. No. 



6307. 

 Syn. hifasciella Chambers, Bull. Geol. Surv. Terr., iv, 101, 119, 153, 1878.— Dyar, 



Bull. 52, U. S. Nat. Mus., 1902, No. 6329.— cen/er.-c Walsingham. Proc. 



U. S. Nat. Mus., xxxiii, 222, 1907. 



Face and palpi whitish, face tinged with reddish orange, deeper towards the 

 vertex. Antennae silvery gray beneath, dark gray above, with a lighter joint 

 near the apex. 



Thorax and forewings shining reddish brown. Forewings with silvery mark- 

 ings dark margined externally. At the basal fourth is a silvery fascia, nearer 



