172 The Ohio Journal of Science [Vol. XX, No. 5, 



to that of E. leucofrons, but with sHght differences in the 

 mesothoracic tubercles. 



The dark head and palpi, lusterless white markings, and 

 dark apex and cilia separate this species from other similarly 

 marked species. 



Elachista cana n. sp. 



Head white; palpi white, shaded with fuscous beneath; antennae 

 whitish at base, becoming dark fuscous toward tip. Thorax arid fore 

 wings dull whitish. Base of costa fuscous; wing slightly dusted with 

 pale ocherous fuscous-tipped scales, which, when not too sparse, are 

 seen to be arranged in three lines, one below costa from basal third and 

 running into the cilia at apical third, a second along middle of fold and 

 passing upward and outward nearly to apex, a third below the fold and 

 running into it near the margin. Apex of the wing sometimes faintly 

 ocherous tinged and with a few microscopic black specks in the extreme 

 apex. Hind wings pale gray, cilia darker. Legs white, tarsi fuscous. 

 Abdomen fuscous above, white beneath. Expanse: 8.5-9.5 mm. 



Type (cf) and two paratypes, males, Tolland, Colorado, 

 9,000 feet, August 10 (E. Lucy Braun, collector). 



Elachista orestella Busck. 



The larva of this species mines the basal overwintering 

 leaves of Hystrix patiila, from October or November to May of 

 the following spring. The mine at first lies near the upper epi- 

 dermis (in Hystrix facing downward), which is drawn together, 

 bending the leaf into a fold. Along this fold, 3 or 4 cm. in length, 

 the parenchyma is not consumed, except when the larva nears 

 maturity. Later the mine broadens out, and becomes several 

 inches long. The larva occasionally makes a new mine, entering 

 the leaf at the tip and mining downward. Larva pale yellowish, 

 first thoracic segment with two rather broad dorsal stripes, 

 becoming darker posteriorly and each ending in a black spot; 

 mid-dorsal line of body whitish. Pupa suspended in a very 

 slight cocoon, of the stout ovate type, four mesothoracic 

 tubercles rather prominent. 



Cincinnati, Ohio. 



Date of Publication, March 10, 1920. 



