78 ENTOMOLOGICAL NEWS [March, '20 



The type series was reared from larvae feeding on Aster 

 shortii at Cincinnati, Ohio. The larva makes a long, trans- 

 parent, linear, contorted and sometimes spiral mine in the 

 leaves in the autumn. In early November, in a slight en- 

 largment at the end of the mine, the larva spins a flat, yellow, 

 circular, wintering cocoon, similar in appearance to the moult- 

 ing cocoon, but of denser texture, within which it lies curled 

 during the winter. In March of the following year, it leaves 

 this cocoon by a circular opening, and bores into a growing 

 shoot just below the growing tip, hollowing out the stem, so 

 that the tip of the shoot dies. It feeds downward, usually 

 eating out the whole contents of the stem for about an inch; 

 when full grown it escapes by a circular hole near the lowest 

 part of the burrow. Lar-va yellowish white, with two black 

 spots on dorsum of first thoracic segment; head yellowish. 

 The white or pale yellowish cocoon, which is of the usual 

 Bucculatrix type, with a series of slightly raised longitudinal 

 ridges, is spun on dead stems or twigs lying near the food 

 plant, but apparently never on the food plant. Imagoes in 

 the latter part of May. 



Although the mines are present in immense numbers on the 

 leaves in the fall, probably not more than one per cent of the 

 larvae reach maturity. 



Tischeria nubila n. sp. 



Face and head whitish straw-colored with a few fuscous scales on the 

 sides behind; antennae whitish, in male fuscous beneath. 



Thorax darker, on the sides more ocherous than the head; fore wings 

 with the ground color sulphur yellow, the color deepening on the margins 

 and in the apical fourth to reddish or brownish ocherous; on these dark- 

 ened areas there is scattered dark dusting, which usually forms a distinct 

 dark line at the base of the cilia around the apex and a rather large dark 

 spot at the tornus, and follows the dorsal margin to the base; under side 

 of base of costa of male fuscous. Hind wings pale ocherous, slighth 

 deeper at apex. 



Legs ocherous dusted with fuscous outwardly. Expanse: 7.5 mm. 



Type (d^), and seven paratypes reared from larvae mining 

 leaves of white oak, Querciis alba, at Winnfield, Louisiana, 

 (collected by G. R. Pilate). The mine is variously placed on 

 the leaf, always elongate, with epidermis wrinkled and torn 



