48 Journal New York Entomological Society. [Voi. xi. 



Cerostoma Latreille. 



Forewings narrow elongate, more'than 314 times longer than broad, smooth, 12 

 veins, 7 and 8 stalked or separate, 7 to termen, 2 and 3 separate. Tuft on second 

 joint of labial palpi broad and blunt, shorter than terminal joint. Ocelli present. 



Type : vittella LiNN. 



Hereto belong presumably all of the European species listed by- 

 Rebel (Staudinger and Rebel, Cat. Lep. Eur., 11, p. 138, 1901J, 

 between vittella Linne and leuconotella Snellen, inclusive. A few of 

 these species are unknown to me except from description. 



The American species, known at present, may be separated thus : 



Forewings with distinct blackish second discal dot I 



Forewings without such dot 2 



1. With blackish streak above the fold aleutianella .i5^«</.' 



Without such streak unicipunctella, sp. nov. 



2. With longitudinal black streaks 3 



Without longitudinal black streaks 6 



3. With continuous broad black streak from base to apex schwarziella, sp. nov. 



Without such streak 4 



4. Ground color pure white Striatella, sp. nov. 



Ground color not white 5 



5 . Head ochreous manella, sp. nov. 



Head black and white barberella, sp. nov. 



6. Head pure white angelicella, sp. nov. 



Head not white 7 



7. Alar expanse less than 19 mm 8 



Alar expanse more than 21 mm 9 



8. Membrane between veins li and 12 in forewing sthickened radiatella Don.y 



Membrane not thickened rubrella Dyar 



9. Forewings light olive brown olivella, sp. nov. 



Forewings dark purplish-brown arizonella, sp. nov. 



Cerostoma unicipunctella, sp. nov. 



Antennae white, dotted with dark brown. Labial palpi on the outside dark fus. 

 cous, striated transversely with white, underside and inside of second joint silvery 

 white ; brush small ; terminal joint thickened in front with rough scales. Maxillary 

 palpi small, porrected, dark fuscous. Face, head, thorax and anterior wings unicol. 

 ored, pale olive buff with golden reflections ; at the end of the cell is a conspicuous 

 black round dot and a few scattered black scales are found especially in the apical 

 part of the wing. Cilia concolorous with wing except the extreme dorsal part, which 

 is white. Hindwings light silvery gray, deepening toward the edges ; cilia whitish 

 fuscous. Legs fuscous, tarsi blackish. Alar expanse, 23 mm. 



Habitat : Williams, Arizona (Schwarz and Barber). 

 U. S. National Museum, type No. 6751. 



