NORTH AMERICAN EUCOSMINAE. 217 



side of costa spotted with cream white. Hind wing dark smoky 

 fuscous; cilia slightly paler with a dark basal band. 



Male genitalia of type figured. 



Alar expanse. — 12-15 mm. 



Type.— C?it. No. 24847, U.S.N.M. 



Paratypes. — In National Collection, American Museum, and collec- 

 tion Barnes. 



Type locality. — Ruidosa Canyon, Lincoln National Forest, New 

 Mexico. 



Food plant. — Heuchera wootoni. 



Described from male type and three female paratypes reared 

 under Hopk. U. S. no. 13972, Apr. 24 to May 8, 1917, from larvae 

 mining the leaves of the "Alum root." The larvae spend the entire 

 feeding period within the leaf, making a large white blotch mine 

 similar to that of the oak Micropterygid {Mnemonica auricyanea 

 Walsingham). When they have finished feeding they leave the 

 mines and enter the ground for pupation. I took the larvae in 

 early October of 1916 in Ruidosa Canyon. From these, moths were 

 reared the following spring. The Heuchera grows in isolated 

 patches in the damp, shady spots along the lower slopes of the 

 Canyon. Most of the leaves show the work of the insect; but it is 

 none too common even in favorable localities. 



In addition to the reared material I have before me two collected 

 specimens from Eureka, Utah (Tom Spalding, " V-14-10," " V-20- 

 10"), which are also referable to ruidosana. They are considerably 

 larger than the types (18-19 mm.) and probably represent a local 

 race but except for the size the differences are not sufficient to 

 justify even varietal designation, especially on such limited material. 



36. EPINOTIA HEUCHEKANA, new species. 

 (Fig. 379.) 



Like ruidosana but smaller and darker, the white on fore wing 

 limited to vertical streaking on the dark basal patch, a moderately 

 broad angulate fascia bordering the basal patch and some white 

 streaks on outer half of costa; the black dusting on outer third of 

 fore wing is more intense and diffused than in ruidosan-a, the cilia 

 are also more blackish below apex and the entire termen is margined 

 by a strong black line. Palpi white shading to blackish fuscous 

 toward the tips. Hind wing very dark brown; cilia pale smoke 

 color with a dark brown basal band. The genitalia differ chiefly in 

 the shape of the uncus. In heucherana this organ is broad and heavy, 

 while in ruidosana it is attentuated in the middle. The differences 

 are well shown in the figures. 



Male genitalia of type figured. 



