13 



the species from British CoUinibia but there is a specimen in the Gross- 

 beck Collection taken in the Santa Cruz Mts. Calif, in March. Appar- 

 ently it only flies in early spring. 



With this species we end those members of the short palpi group 

 in which the Uncus is simple and more or less broad at the apex ; the 

 remaining species in the group show a bifurcate Uncus and lead over 

 into the moderate palpi group in which the bifurcation of the Uncus is 

 carried to a still greater degree. In this present subdivision are several 

 apparently undescribed forms with long narrow neck to the Uncus and 

 with each fork narrow and straight, forming together a broad Y shaped 

 opening ; we commence with the description of these species. 



Hydriomena TUOLUMNE sp. nov. (PI. II, Figs. 13, 14; PI. VIII, 



Fig. 2). 



Palpi very short; primaries light gray sprinkled with smoky and shaded 

 with ruddy brown ; basal space rather clear gray bordered outwardly by a dark, 

 very oblique subbasal line extending from costa near base to jnst before middle 

 of inner margin, either rigidly oblique or with a very slight incurve below cell; 

 between this subbasal line and the antemedian line is a broad space shaded 

 strongly with ruddy brown and crossed centrally by an oblique, broad, dark band 

 forming slight outward angles in cell and submedian fold; the inner margin of 

 this antemedian space is shaded with black ; antemedian line narrow, wavy, dark, 

 slightly less oblique than subbasal line, angled in the submedian fold; median 

 space pale whitish with a slight ruddy tinge and narrow discal streak, edged 

 outwardly by a dark postmedian line which is strongly angled inwardly in cell, 

 bent backward between vein 4 and subtnedian fold narrowing the median space 

 considerably and tending to connect with antemedian line at this point, then 

 parallel to same to inner margin at outer angle ; subterminal space shaded with 

 ruddy brown and bordered outwardly with a broad curved purplish-black s. t. 

 band, narrowing toward inner margin with straight outer edge; a dark apical 

 dash below which are two parallel dark streaks, the lower extending from outer 

 edge of s. t. band to postmedian line ; terminal area pale with veins bordered on 

 each side by short dark streaks. Secondaries pale smoky with traces of a discal 

 dot and curved postmedian line showing through from under side. Beneath pale 

 smoky, secondaries with discal dot and line better defined. Expanse 28-30 mm. 



Habitat: Tuolumne Meadows, Tuolumne Co., Calif. (Aug. 8-15) (6000 

 ft.); So. Fork, S. Bernardino Mts., CaHf. (Grinnell). 3 <J , 6 9. Types, 

 Coll. Barnes. 



This species is apparently confined to liigh altitudes of the Sierras ; 

 besides the type series we have a single 9 from the Lake Tahoe dis- 



