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. 



C/'/Jtiu^lS, L. guttiftnitclla. Front silvery, with a reddish hue. 

 Tuft and thorax reddish-orange. Antennas blackish-brown. 

 Fore-wings rather deep reddish-orange, with favo 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 macula). 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. cratcegella. Antenna), front and tuft dark silvery- 

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

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



