116 



Ti/iHS, $ 5, Miis. Whm. 



Far. B. — Another variety has brownish-gray fore-wings, the whitish-ucherous stripe 

 being entirely, or almost entirely, obliterated, a unmber of scattered dull whitish- 

 ocherous scales giving a mottled appearance to the almost uuicolorous fore-wings. 

 Some specimens of this variety are very small, their expanse reaching only 9™'". 

 Habitat, Shasta County and Siskiyou County, Cal. 

 T!U)€S, S 9 , Mu8. Wlsm. 



Described from nine males and five females taken in July and August, 1871. 



I should certainly have regarded these three forms as specifically distinct had it not 

 been for a careful examination of the genital appendages, which appear to be pre- 

 cisely similar. Moreover, my specimens of all the forms were taken at approximately 

 the same time and place. 



Butalis albiliueata sp. n. 



Antennce, brownish-fuscous. 



Palpi, white, dusted with brownish-fuscous, especially on the outer side. 



Head, brownish-fuscous, with some whitish scales on the face and about the eyes. 



Thorax, brownish-fuscous, touched with white on the patagia. 



jFore-idH(/s, brownish-fuscous, with a strong white line of even width running from 



the middle of the base to the apical margin below the apex; the extreme costa 



very narrowly whitish beyond the middle ; cilia brownish-fuscous with a few 



white scales along the costa and beneath the apex. 

 Bind- win f/s and cilia, $ dark purplish-fuscous ; $ brownish-fuscous. 

 Abdomen, brownish-fuscous above, white beneath. 

 Legs, brownish-fuscous, with a good deal of white about the tarsi and on the uuder- 



side. 

 Exp. al., 10"^". 

 Habitat, Arizona. 

 Tjipes, $ 2 , Mus. Wlsm. 

 Oue male and two females received from the late H. K. Morrison. 

 This species approaches very closely the European B. schleichiella Z. 



Arotrura. gen. n. 



["aporpoj' = plow, ovfto! = tail.] 



Type Arotrura eburnea Wlsm. ^ 9 . 



Fig. 22.— Arotkura eburnea Wlsm. 



Neuration and uncus, 

 enlarged (original). 



a, Anterior wing; 6, posterior wing — 



Antenna; simple throughout ; basal joint flattened, elongate. 



Lahial 2>alpi, Yiorrect, slightly recurved; basal joint clothed with closely appressed. 

 scales ; apical joint two-thirds as long as the second, tapering, but somewhat stout. 



