23 



23) amongst the Museum material which is apparently referable here 

 and another rubbed 9 in the Barnes Coll. from Redington, Ariz, may 

 also possibly be found to represent a form of this species. 



The species seems best placed near perfracta Swett ; its narrow 

 pointed wings and peculiar mottled appearance should render it easily 

 recognizable. 



We have before us several specimens from the Sierra Nevadas, 

 Calif, which seem to represent a new species; the general appearance 

 is strikingly close to a \Vestern race of niberata to which we will refer 

 later but tlie palpi are distinctly shorter and the average size somewhat 

 smaller. The species is related in shape of Uncus to the perfracta 

 group but the Uncus has a very narrow neck and the bifurcations are 

 short and not widely separated, resembling considerably the Uncus 

 of tiioliimne; we describe the species as follows: 



HVDRIOMENA SIERRAE sp. ttov. (PI. IV, Figs. 4, 5; PI. VIII, Fig. 8). 



Primaries dull gray, sprinkled with smoky; space between lines 1 (subbasal) 

 and 3 (antemedian) filled with dull reddish-brown through which runs a faint 

 irregular smoky band shaded with black at inner margin ; similar reddish sliading 

 beyond line 4 (postmedian) ; basal and median areas whitish-gray, very slightly 

 tinged with ruddy, latter with small discal dash; line 1 (subbasal) black, thick, 

 slightly rounded below costa and bent in somewhat in fold ; line 3 rather evenly 

 oblique, slightly waved ; line 4 thick and outwardly oblique below costa, bent in 

 opposite cell and then strongly bulging outwardly, bent backward between veins 

 4 and 2, forming two scallops, and parallel to line 3 from vein 2 to inner margin ; 

 subterminal band broad, smoky, slightly scalloped on both sides and bordered 

 by a white line ; apical black streak and two parallel black subapical black dashes, 

 the lower one longer and extending across subterminal band to line 4 ; fringes 

 checkered with blackish at ends of veins. Secondaries rather pale smoky with 

 distinct discal dot and two darker lines, the one postmedian, rather sharply bent 

 before vein 3, the other submarginal, broader and more diffuse ; fringes distinctly 

 checkered. Beneath pale smoky with distinct discal dots and postmedian and 

 submarginal lines on both wings. E.xpanse 26 mm. 



Types, 1 ^,1 9. Shasta Retreat, Siskiyou Co., Calif, (June 24-30) (July 

 1-7) (McDunnough). Paratypes, 4 $,2 9- Cisco, Placer Co., Calif. (June), 

 3 $ and 1 9 being in the Collection of the American Museum, 



With the above species we end the members of the moderate palpi 

 group in which the Uncus is shortly bifurcate with a rather long narrow 

 neck, the remaining members of this group form a subsection in which 

 the bifurcations are very deep and U-shaped, thus eliminating more or 



