337 



dull form, as was the case with one other of his species. Our Montana 

 specimen is more doubtful. 



The early stages are unknown. 



21. Platyptilia maea n. sp. PI. XLIII, fig. 8. 



Head and body grayish white with some brown scales. Abdomen witli 

 dark subdorsal lines just beyond middle and similar lines below. Antennae 

 brown dotted above : frontal tuft very slight ; palpi moderate, slender. Fore and 

 mid tibiae whitish with dark lines. Legs otherwise whitish with gray-brown 

 shading which usually predominates. 



Primaries with a dark dot before cleft and a costal shade above which 

 indicate the outer limits of the usual triangle, but in this case they are vaguely 

 connected by a brownish gray shade which nins back along the costa. On 

 the costa it is always followed by a whitish dash which may extend further 

 across the wing as a pale shade. Lobes brownish gray crossed by the usual 

 outer pale line, incomplete on the second. Inner margin paler, especially just 

 inside of the cleft, where it is sometimes whitish buff. Spot in cell and those 

 near inner margin present or absent. Dark areas more or less irrorate with 

 white, but never plentifully. Fringes gray with white bases containing the 

 usual dark basal scales on the outer margin and two clusters on inner; dark at 

 angles. Secondaries more brownish with concolorous fringes; third lobe paler, 

 with a few dark scales in fringes of inner margin. Expanse 19-25 mm. 



Male genitalia as in the preceding species. (See plate L, f. ISu.) 



Described from nine specimens taken in the Tuolumne Meadows, Tuolumne 

 Co., Cal., in July and August, and disposed as follows: 



Holotype S , allotype and 4 paratypes 5 , coll. Barnes. 



Paratype S and paratype 9 , U. S. N. M. No. 23462. 



Paratype S coll. Meyrick. 



We associate with these a number of specimens from Wash., 

 Ore., Alta., Utah. Colo, and Cal. which are in general much lighter in 

 color. All agree in lacking a well defined triangular spot before the 

 cleft, and in having the position of the anal angle of this spot marked 

 by a blackish dot, conspicuous in all but the darkest specimens. The 

 form may belong to the albida series, but is very readily separated. 

 It is intermediate between those species and cooleyi in the development 

 of its pattern. 



In a few specimens there is a trace of a subterminal cluster of 

 slender dark scales in the fringes of the third feather of the second- 

 aries which indicates relationship with albidorsclla as well. 



