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



Habitat : Williams, Arizona (Schwarz and Barber). 



Food-piant : Qiiercus. 



U. S. National Museum, type No. 6762. 



Described from a bred specimen. x\ series of less perfect, evi- 

 dently somewhat rubbed specimens collected by the same gentlemen 

 at the same, locality are before me. They are much lighter, more 

 violaceous and white, suffused with light canary yellow ; but they 

 have the same peculiar "W" marking and are probably at most a 

 variety of this species. 

 Harpipteryx HUbiicr. 



Forewings rather broad with apex greatly produced and bent backwards, sickle- 

 shaped ; no erect scales ; 12 veins, 7 and 8 stalked, 7 to tennen, 2 and 3 connate or 

 stalked. Labial palpi with strongly developed porrected tuft which is more than 

 twice as long as terminal joint. Maxillary palpi moderate. Ocelli probably present 

 in all the species though obscured by the scales and difficult to discern in some. 

 Heinemann and Wallengren state that they are absent. 



Type: xylostclla Linne.. The European species belonging to this 

 genus are nemorella Linne, bhuidella Christoph, falcclla Hiibner, 

 xylostella Linne and affiiiitella Staudinger. 



The known American species may be separated thus : 



Apical half of costal edge of forewings dark purplish -brown I 



Entire costal edge canary yellow canariella IVals. 



I. Light dorsal area of forewings with strong upward projection into dark part of 



forewing dentiferella //'' Is. 



Light dorsal area without such projection frustella Wals. 



Harpipteryx canariella Wahingham. 



Ceroslotita canariella W.-vlsingham, Proc. Zool. Soc. London, p. 309, pi. 

 XXXV, fig. II, 1881. 



Periclymenobius canarielhis RiLEY, Smith's List Bor. Am., No. 5240, jSgi. 

 Periclymenobius canarielhis Dyar, Bull. U. S. Nat. Mus., 52, No. 548S, 1903. 



Cotype received from' Lord Walsingham is in the U. S. National 

 Museum ; also other specimens from California. 

 Harpipteryx dentiferella Walsingham. 



Cerostoiiia dentiferella Walsingh.\m, Proc. Zool. Soc. London, p. 308, pi. 

 XXXV, fig. 10, iSSi. 



Periclymenobius drntiferellus'Kw.YX , Smith's List Lep. Bor. Am., No. 5205, 1S91. 

 Pertclymtnohiits dentiprellus Dyar, Bull.. U. S. Nat. Mus., 52, No. 5489, 1903 



Cotype of this species received from Lord Walsingham is in the U. 

 S. National Museum. 

 Habitat: California. 



