139 



Co., Calif., at an altitude of about 8000 ft. ; these meadows are situ- 

 ated on the Eastern side of the Sierras, south of Mt. Whitney near 

 the headwaters of the south branch of the Kern River and proved to 

 be an excellent collecting ground. 



Superficially all the specimens appeared very similar but an exam- 

 ination of the structure of the S antennae and uncus showed clearly 

 that three species were represented, all belonging to the short-palpi 

 group. Apparently they are races of species described from more 

 northern localities to judge by the similarity of the structural details 

 but as they present quite a distinct appearance we believe that racial 

 names are warranted. The three species with which we associate 

 our new forms are hcnsliawi Swett, sha^ta B. & McD. and irata Swett ; 

 the first named may be separated by the thin $ antennae which are 

 scarcely thicker than in the 9 sex ; shasta has very thick $ antennae, 

 strongly laterally compressed and with the segmental incisions rather 

 deeply cut so that the lower surface is distinctly serrate in appearance ; 

 in irata the antennae are rather thinner than in shasta but still more 

 serrate ; the differences in the shape of the Uncus have been already 

 illustrated by us in our Revision of the genus. We describe the new 

 races as follows. 



Hydriomena henshawi expurgata var. nov. (PI. XXI, Fig. 6). 



Typical henshawi is more or less entirely suffused with dull gray pre- 

 senting quite a unicolorous appearance; the present race is much more con- 

 trastingly and brightly marked ; the basal and median areas are pale with a 

 slight ochreous tinge and the antemedian and subterminal blue-gray bands 

 stand out sharply and brightly ; the pale median area is bordered on both 

 sides by distinct ruddy shades, especially toward the inner margin, and there 

 is a certain amount of ruddy shading terminally and beyond the pale basal 

 area, these shades serving to accentuate the blue-gray bands already mentioned. 



Habitat: Monachee Meadows, Tulare Co., Calif. (8000 ft.). 3 ^,6 2. 

 Types, Coll. Barnes. 



Hydriomena shasta borussata var. nov. (PI. XXI, Fig. 5). 



Larger and much paler than our unique type of shasta; primaries whitish, 

 lightly sprinkled with smoky atoms with the dark cross lines and bands rather 

 contrasted ; subbasal line outwardly oblique with prominent outward angle in 

 cell and inward angle in submedian fold ; antemedian band prominent, dark, 

 dentate; the border lines of the broad pale median area improminent, edged 

 faintly with a ruddy suffusion ; subterminal band broad except at inner angle, 



