272 ENTOMOLOGICAL NEWS. [JunC, '15 



Twelve specimens, Loma Linda, California. The larva is a 

 miner on Prunus Uicifolia, a shrub with small, thick, spiny- 

 edged leaves. The mine is visible on the upper side of the leaf 

 as a short elongate ridge, the loosened epidermis being raised 

 slightly above the general surface of the leaf. The entire 

 length of the mine is not greater than i cm., its breadth 2 or 3 

 mm. At emergence the pupa is thrust through the lower epi- 

 dermis. Mines received from Mr. G. R. Pilate in April ; 

 imagos at the end of the same month. 



Types in my collection. 



In addition to the well known Tischeria ceanothi Wlsm., 

 there are at least two species of Tischeria mining on other 

 species of Ceanothus in California. One of these resembles 

 T. ceanothi very closely, but seems to be entitled to specific 

 rank. The other approaches more closely to the type of the 

 oak-feeding species in coloration and markings, 



Tischeria ambigua n. sp. 



Entire head, palpi and antennae dark gray, scales tipped with white. 

 Tuft on basal segment of antennae unusually long. 



Fore wings gray, scales white-tipped ; base of wing darkened espe- 

 cially on the costa; a darker transverse tornal spot, sometimes reach- 

 ing half-way across the wing. In general, there is a paler area extend- 

 ing along the middle of the wing from base to two-thirds. Hind wings 

 and cilia gray, faintly tinged with ocherous. 



Fore and middle legs dark gray; hind legs yellowish, with the tarsal 

 segments dark-tipped. Abdomen becoming yellowish posteriorly. 



Expanse: 10.5-11 mm. 



Three specimens, Fredalba, San Bernardino County, Cali- 

 fornia. The larva is a miner on a small, thick-leaved species of 

 Ceanothus. The mine begins as a short linear tract perpen- 

 dicular to the midrib, soon bending sharolv on itself, and 

 broadening into a short, elongate blotch, which is deep yellow 

 in color. The oupa is thrust through the lower epidermis at 

 emergence. Mines and imagos in the latter part of August. 



Types in my collection. 



In addition to the slight differences in color and markings, 

 viz., the darker head and absence of brown in the ground color, 

 individuals of this species are of considerably larger size than 

 those of T. ceanothi, of which the larger specimens do not 

 exceed 9 mm. in expanse. 



