Vol. XXvi] ENTOMOLOGICAL NEWS. 273 



Tischeria bifurcata n. sp. 



Face, palpi and antennae very pale yellow, tuft on head usually 

 deeper yellow, occasionally with a few fuscous scales. 



Ground color of the fore wings variable ; sometimes the wing is very 

 pale yellow at the base, shading to deep yellow toward the apex ; at the 

 other extreme are specimens in which the deeper color extends to the 

 base of the wing; such specimens have the apex of the wing much 

 darkened, the color becoming almost orange. Base of the costa fuscous ; 

 sometimes merely the extreme edge of the costa is dark, sometimes 

 there is a streak of scattered fuscous scales along the costa from the 

 base to the middle of the wing. There are scattered darker-tipped 

 scales. These are more plentiful near the costa, where they form the 

 dark streak just referred to, and in the apex of the wing. Hind wings 

 and cilia pale yellow. 



Legs pale yellow, anterior pair shaded with fuscous externally. Ab- 

 domen yellow, shading to fuscous posteriorly. 



Expanse : 8 mm. 



Twelve specimens, Fredalba, San Bernardino County, Cali- 

 fornia. The larva is a miner in leaves of a species of Ceano- 

 thus. The work of the larva is very characteristic, differing 

 in appearance from that of the other species, though retaining 

 the general characters of the genus. The mine starts as a linear 

 tract, curving upwards and meeting the midrib in the upper 



Mine of Tischeria bifurcata. 



third of the leaf, whence it follows the course of the midrib 

 downwards to a point about one-third from the base of the 

 leaf, where it branches to either side. In these branches the 

 greater part of the parenchyma is consumed, so that the mine 

 is somewhat transparent and the epidermis is brownish dis- 

 colored in spots. From a to a', as shown in the figure, the 

 mine is lined with silk and the lower epidermis projects as a 

 ridge on the underside, forming a tube into which the larva 

 retreats when disturbed. Pupation takes place in the part of 

 this tube which lies over the midrib ; the pupa is thrust out at 

 the upper end on the underside of the leaf at emergence. 



The mines were collected by Mr. G. R. Pilate in the middle 

 of August; the images appeared August 31 to September 2. 



Types in my collection. 



