324 PROCEEDINGS OF THE ACADEMY OP 



I have two or three other specimens which appear to unite the specific 

 characters of the present and succeeding species, and I therefore decline to 

 describe them until I have conducted more careful observations on their em- 

 bryonic histories than I have instituted at present. 



13. L. guttifinitella. Front silvery, with a reddish hue. Tuft and 

 thorax reddish orange. Antennae blackish brown. Fore wings 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 Dear the tip above the middle of 

 the wing. There are two hinder-marginal lines, one the margin of the dis- 

 persed scales, the other dark brownish in the cilia. 



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

 codendron (Poison Oak) mining the upper surface in a rather broad, 

 tortuous tract, and there are ordinarily several in the same leaf. The larva 

 belongs to the second larval group. The head is a fine pale brown ; the body 

 yellowish posteriorly, becoming brownish above, with dorsal and ventral dark 

 brown maculae. The cocoon is circular, formed within the mine as usual in 

 this group in a little circular depression. 



It is probably unnecessary to caution the collector to be careful in hand- 

 ling the leaves of the food-plant of this larva ; to many persons they are 

 poisonous, producing a very disagreeable and uncomfortable eruption. I was 

 affected by it when I first collected this species, and would advise all others to 

 handle the food-plant " with gloves." 



14. L. cratsegella . Antennae, front and tuft dark silvery gray. Fore 

 wings rather deep brownish golden, with a broad silvery basal streak, black- 

 margined toward the costa, extended to the tegulae in front and pointed be- 

 hind, with the point black-margined on both sides and with the costa black. 

 Four costal silvery streaks, the first oblique but rounded beneath and black- 

 margined on both sides, the others toward the base alone. Three silvery 

 dorsal streaks, the first rather broad, oblique, nearly touching the first costal, 

 and black-margined on both sides as also the second ; the third only toward 

 the base. A streak of black scales in the middle of the wing at the apex, 

 extended backwards between the streaks to the second dorsal and costal. 

 Hinder-marginal line blackish, with a violet metallic hue ; cilia dark fulvous. 



The larva mines the underside of black thorn during September and Octo- 

 ber. The mine is usually limited by two veins of the leaf. The larva is cy- 

 lindrical, with a very pale brown head ; the body yellowish, colored dark 

 green by the ingesta. The imago appears in April and May. 



15. L. hamadr y adella. Front, tuft and thorax white. Antenna; 

 white, annulated above with blackish. Fore wings white, with an angulated, 

 shining, ochreous saffron band, rather behind the basal third of the wing, 

 black-margined internally with dispersed scales ; a broad angulated band of 

 the same hue, behind the middle, black-margined internally with dispersed 

 black scales, produced in the middle, so as to divide it into two portions, with 

 the space between the bands somewhat suffused behind the second with ochre- 

 ous saffron, and an irregular line of blackish dispersed scales through the 

 middle of it. Near the tip is a costal and dorsal ochreous saffron spot, with the 

 white space between these and the second band dusted with blackish, with 

 the apical portion white, dusted with black scales, and connected with the 

 patch before it by a line separating the costal and dorsal spots. The basal 

 portion of the wing somewhat dusted with black, with a small blackish patch 

 on costa near the base and two small, faint saffron patches beyond it. The 

 hinder-marginal line blackish, cilia with a fulvous hue. Hind wings rather 

 dark silvery gray, cilia with a fulvous hue. 



[Nov. 



