332 AMERICAN MICRO-LEPIDOPTERA. 



dorsal streak, whose external dark margin is continued into the dusted apex, 

 and which usually unites with a sickle-shaped costal streak lying above the 

 dusted apex, and concave toward the costa. The dark margin of the third costal 

 streak is sometimes continued along the costa to this last streak. Cilia ocherous, 

 with a dark brown hinder marginal line through their middle. Alar expanse 

 7.5-9 mm. 



Hindwings gray, with a bluish metallic lustre. Cilia fulvous. Abdomen dark 

 bluish metallic above in the male, pale yellowish beneath, with a median line 

 and diagonal marks on each segment dark. In the female with the last two or 

 three segments and tuft ocherous, pale ocherous beneath and marked as in the 

 male. Legs whitish, the first two pair annulate with black ; hind tibise shaded 

 with ocherous and black scales, tarsi tipped with black. 



Mills College, Alarneda County, California. 



Described from specimens bred from leaves of Quercus agrifolia 

 Nee. received from Mr. G. R. Pilate. The mine is a whitish, some- 

 what irregular blotch on the upperside of the leaf. The pupa is 

 formed under a flat nearly circular semi-transparent web, the upper 

 epidermis, as is usual, being thrown into a longitudinal fold. 



This species is very near to umbellularice Wlsm. The most 

 marked difference is the absence of the costal and dorsal basal white 

 patches characteristic of that species. 



Lithocolletis coiiglomeratella Zeller. 

 Plate XXIII, Fig. 16. 



Lithocolletis conglomeratdla Zeller, Verh. zool.-bot. Ges. Wien., xxv, 346, 1875. 

 Walsingham, Ins. Life, ii, 24, 1889. Dyar, Bull. 52, U. S. Nat. Mus., 

 1902, No. 6295. 



Syn. bicolorella Chambers, Bull. Geol. Surv. Terr., iv. 103, 1878. obtusilobte Frey 

 and Boll, Stett. ent. Zeit.. xxxix, 265, 1878. 



Thorax saffron yellow; head lighter, with whitish face and palpi. Autennse 

 closely annulate with brown, annulations obsolete toward the base. Fore and 

 middle tarsi white, spotted with black ; hind tarsi pure white. Of the size of an 

 average quercifoliella. Forewings dull saffron yellow. On the costa there are 

 two very short oblique streaks and a dot, at one-third, one-half and two-thirds 

 the wing length, all three of a lustreless white color. The two former are exter- 

 nally blackish margined, the second being the longer and dusted around its apex 

 with black scales. A narrow white line extends along the dorsal margin, becom- 

 ing less distinct opposite the first costal streak, beyond which it is almost obso- 

 lete, until it reaches a place between the second costal streak and the costal spot, 

 where it is broadened and deflexed,and extends as the inner margin of the black 

 apical dusting, nearly to the apex of the wing in an outwardly convex line be- 

 coming narrower. uch is the case in but one specimen ; in the second it stops 

 entirely after the broadening, which makes a short streak, and as an indication 

 of its continuation, there is an indistinct dot above the dusting, somewhat behind 

 the costal streak. Toward the dorsal cilia and partly on them is a broad trans- 



