60 JOHN B. SMITH. 



terminal line, cut by the white veins. Fringes cut with white beyond the veins. 

 A black line extends below the subcostal from the base to the orbicular. The 

 latter is small, irregular, almost round, and incompletely outlined. Eeniform 

 large, incompletely outlined, nearly concolorous. Claviform large, well defined, 

 extending nearly to the t. p. line, with distinct black outlines. Secondaries 

 soiled whitish, the veins dusky marked, a dusky submarginal band and a small 

 discal lunule. Beneath whitish, powdery, the primaries darker, both wings with 

 an outer line and a discal lunule. Expands 31 mm. : 1.25 inches. 



ifa6.— Boulder, Mont. 



Male and female are in the collection of Mr. A. Schoenborn, at 

 Washington, received from Mr. Titus Ulke. 



The antennae in the male are quite lengthily pectinated, resembling 

 thu!i popula7-is rather than cespitis. 



PLATYPERIGA n. gen. 



Head rather small, distinct; eyes large, naked, without lashes; 

 front flat, smooth ; palpi moderate, terminal joint either small or of 

 moderate size ; tongue long, corneous ; antennae in the male simple 

 or ciliated, in the female simple. Thorax small, rounded, vestiture 

 scaly, smooth, forming a small, inconspicuous basal tuft; legs rather 

 slender, unarmed, posterior much longer, with scaly clothing. Ab- 

 domen long, slender, untufted or v.'ith small scale tufts on the basal 

 segments. Wings large, primaries trigonate, costa somewhat arched, 

 apices rectangular or a little produced ; secondaries proportionate ; 

 venation normal, vein 5 of secondaries weak. 



This generic term is proposed for three species which, with the 

 essential characters of Perigia, combine a much slighter body and 

 proportionately large wings. 'J'hey have a scaly vestiture, different 

 in character from that of the Byrophilid series, and the habitus is 

 Hadeniform, rather than otherwise. 



The type of the genus is P. camma, in which the wings are broadest, 

 the costa arched, the male antennae quite densely ciliated, and the 

 terminal joint of the palpi is very short. In discistriga the wings 

 are narrower, the costa is not arched, the male antennae are simple, 

 and the terminal joint of the palpi is moderate in length. 



Plalyperigea cainina n. sp. (PI. vi, fig. 9)- -Head, thorax and primaries 

 immaculate; primaries with all the normal maculation obscure, the t. p, line 

 only barely traceable as a faint pale shade. In the median cell a black dash 

 lepresents the orbicular and a somewhat lunate, and entirely indefinite blaick 

 spot represents the reniform. There is a series of obscurely marked terminal 

 lunules, and the fringes have an obscurely pale interline. Secondaries soiled 

 white, outwardly powdery, the veins smoky; a series of well marked terminal 



