102 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



saflfron. Taft pale saffron, darker toward its sides. Antennse silvery- 

 white beneath, shining brown above. Thorax and fore wings deep red- 

 dish-saffron, with two silvery-white fascia on the wings, dark-margined 

 behind, each of which is nearly straight, one placed at about the basal 

 third, the other behind the middle: immediately before the cilia are a 

 costal and an opposite dorsal silvery-white streak, also dark-margined 

 behind ; apex densely dusted with brown, forming a large spot, which 

 has a few white scales before it and others intermixed; cilia saffron, 

 tipped with silvery-gray, and with a dark brown, hinder marginal line 

 before the tips. Hind wiugs and upper surface of the abdomen dark 

 fuscous. Under surface of the abdomen silvery- white, with a large yel- 

 low spot on each side of each segment, and one on the under surface of 

 each of the last three or four joints: anal tuft yellow, tipped with silvery. 



First (and second ?) pair of legs brown on their anterior, white on their 

 posterior surfaces: the tarsi annulate with white; hind legs white, the 

 tarsi annulate with fuscous, and a pale saffron spot on the outer surface 

 of the tibia. Alar expansion scant four lines. 



Described from a single ? bred from a long, rather wide, and irregular 

 mine on the upper surface of a leaf of the White Oak {Q. alba). The 

 pupa was concealed under a white, silken web over the midrib, and the 

 larva is unknown. 



It bears an evident, though not very close, relationship to L. obstrie- 

 tella Clem. ; but in the latter, instead of the costal and dorsal spots before 

 the cilia, there is a white fascia. But this alone would not be necessarily 

 of specific value. The streaks are, however, a little differently placed ; 

 and obstriotella has a whitish band near the tip of the antennae, which is 

 absent in this species ; and Dr. Clemens makes no mention of the brown 

 outer surface of the third joint of the antennae, nor of the yellow spots 

 on the abdomen. He simply says, "abdomen black", and makes no 

 mention of the palpi. But there is a more decided difference. The 

 larva of obstrictella belongs to the cylindrical group, and makes a tenti- 

 form mine on the under surface of leaves of " the Black Oak" {Q. tine- 

 toriaf). This mine is on the upper surface of White Oak leaves, and 

 though the larva is unknown, the character of the mine indicates that 

 it belongs to the '^flat" group. There are other differences, but these 

 here indicated are sufficient. 



As compared with L. tubiferella Clem., to whicli the mine and the 

 imago bear some resemblance, it is deeper reddish-saffron than tubiferella, 

 which also has the tuft white, has no dorsal and no costal streak behind 

 the fascia-, and the apex is not dusted. It is more like L. guttifinitella 

 Clem., or rather it is between obstrictella and guttifinitella; but the latter 

 always has the first fascia oblique toward the base of the costa, the 

 costal and dorsal spots in the apical part of the wing pointing obliquely 

 backward and smaller, and the dusting is scattered along the base of 

 the cilia, rather than, as in this species, forming a spot which is white- 

 margined before. By these characters, also, guttifinitella may be dis- 



