18 



THE CANADIAN ENTOMOLOGIST 



eye-caps are yellowish white and the wings expand 4.5 mm. In 

 all other respects it agrees with the bred specimen. 



A distinct and very easily recognized species. 



Nepticula latifasciella Chambers. 



Nepticula latifasciella Chambers, Bull. Geol. Surv. Terr., IV,. 

 106, 1878; Dyar, List N. A. Lep., No. 6200, 1902. 



In the description of this species, Chambers notes that it was 

 taken resting on the trunks of chestnut trees, the leaves of which 

 were full of empty Nepticula mines. 



I have bred a number of specimens on red and scarlet oaks. 

 The mine is a narrow linear tract gradually broadening to its end, 



where it measures scarcely 1.5 

 mm. in width. At first the frass- 

 is deposited in a broad line through 

 the centre, later scattered across 

 almost the entire breadth and 

 toward the end of the mine col- 

 lected in a broad band. On red 

 oak, the mine measures approxi- 

 mately 5 cm. in length; on scarlet 

 oak, it is much shorter, often not 

 exceeding 3 cm. The larva is 

 bright green and escapes" from the mine through the lower surface 

 of the leaf. Cocoon rough, ovoid and whitish in color. There are 

 at least two (probably four) generations a year. The mines are 

 abundant toward the end of July and at the beginning of Septem- 

 ber. 



Nepticula trinotata n. sp. 



Palpi very pale ocherous. Tuft ocherous. Antennae fuscous. 

 eye-caps whitish. Thorax with deep blue reflections. 



Fore wings velvety black, with deep blue reflections in the 

 basal third and somewhat irrorated in the apical third, the scales- 

 here having pale bluish iridescent bases. At the basal third on the 

 costa is a white spot of variable size, faintly tinted with violet in 

 some lights. At the apical third there is a costal and an opposite 

 dorsal spot, each larger and of a purer lustrous white colour than the 

 spot at the basal third. The costal spot is usually more oblique 



Fiu. 



-Mine of V. latifasciella. 



