MARCH, 1863. 221 



entire under surface of the leaf, winding over it so as to detach 

 nearly all the under epidermis. This is extremely delicate 

 and of a bluish-white colour, and often the greater portion of 

 it is detached by abrasions. 



The larva may be taken from the beginning to the latter 

 part of July. My own specimens were found on the 22nd 

 of July, at which time they were nearly full fed. Taken in 

 the latter part of the month it is very easy to rear the larva 

 and obtain the most perfect images. 



TISCHERIA, Zeller.* 



T. quercitella. Fore-wings orange-yellow, apical portion 

 of the wing reddish-brown, dusted with dark brown. Hind- 

 wings pale yellowish, towards the apex reddish-brown and 

 the apical cilia dark brownish. Antennae, head, labial palpi 

 dark orange-yellow. 



The larva makes a white, blotch mine on the upper surface 

 of the leaves of the oak in September and October. About 

 the middle of the mine is a spot whiter than any other part, 

 circular and more opaque. On this spot, when full fed, the 

 larva spins a circular whitish cocoon. The head of the larva 

 is circular; body flattened, tapering posteriorly. Head dark 

 brown ; second segment with a dorsal dark-brown spot divided 

 by a paler vascular line ; body pale yellowish-green immacu- 

 late. 



I have before me a single specimen whose wings are not 

 fully grown. 



See ante, p. 79. H. T. S. 



