76 PAPERS BY DR. B. CLEMENS. 



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 embryonic 

 histories than I have instituted at present. 



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

 Tuft and thorax reddish-orange. Antennas 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 near the tip above the middle of the 

 wing. There 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 toxicodendron (Poison Oak), mining the upper 

 surface in a rather broad, tortuous tract, and there are ordi- 

 narily 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 maculae. The cocoon is circular, 

 formed within the mine as usual in this group in a little cir- 

 cular depression. 



It is probably unnecessary to caution the collector to be 

 careful in handling the leaves of the food-plant of this larva; 

 to many persons they are poisonous, producing a very dis- 

 agreeable 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. crat&gella. Antennae, front and tuft dark silvery- 

 gray. Fore-wings rather deep brownish-golden, with a broad 

 silvery basal streak, black-margined toward the costa, ex- 



