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



lines as to give the wing an indistinct striated appearance. The extreme dorsal edge 

 is darker than the rest of the wing, blackish fuscous, and is limited above by a thin 

 wavy more or less interrupted white line. Above this line in the dorsal part of the 

 wing are several small tufts of erect black scales. Cilia dark fuscous. Termen of 

 forevving is hardly sinuate, but the cilia is cut out just below apex and is abruptly 

 longer at the anal angle, giving the wing a falcate appearance. Hindwings rather 

 dark shining fuscous ; cilia a shade lighter. Legs and underside of body whitish- 

 gray, mottled with black scales; tarsi blackish. Alar expanse, 20-25 mm. 



Habitat : AVilliams, Arizona (Schwarz and Barber), Mt. Shasta, 

 California (Walsingham). U. S. National Museum, type No. 6764. 



Part of the original series determined by Lord Walsingham as 

 Cerostoma iiisfabilella Mann is in U. S. National Museum, besides speci- 

 mens determined at later dates by hiin as Trachoma instabilella. There 

 are also two perfect, authentic European specimens of Cerostoma in- 

 stabilella Mann. I am unable to agree with Eord Walsingham in his 

 determination. His material consisted evidently of flown specimens 

 with most of the erect scales and the details of the ornamentation ob- 

 literated, which has affected a superficial resemblance to instabilella 

 Mann and the record of this southeast European species from America, 

 a priori highly improbable, is thus not well founded. 



It gives me pleasure to name the species in honor of Lord Wal- 

 singham. 



Trachoma senex IValsingham. 



Trachoma senex Walsingham, Insect Life, I, p. 288, 1889. 



Trachoma senex RiLEY, Smith's List Lep. Bor. Am., No. 5202, 1891. 



Trachoma senex Dyar, Bull. U. S. Nat. Mus., 52, No. 5492, 1903. 

 Cerostoma koebelella Dyar, Can. Ent., XXXII, p. 40, 1900. 

 Cerostoma koebelella Dyar, Bull. U. S. Nat. Mus., 52, No. 5499, 1903. 



Dr. Dyar's unique type of koebelella (type No. 4422) is a Tra- 

 choma and, though I have no specimens of senex determined by Lord 

 Walsingham, there is no doubt but that Dr. Dyar's species is identi- 

 cal with it. It agrees with Lord Walsingham's description, and bears 

 the same locality label as his type, which he received from the late 

 Dr. Riley. On the reverse of Dr. Dyar's label is written " Ceros- 

 toma, unnamed. Wlsm., 1886," which shows that Dr. Riley sent a 

 specimen to Lord Walsingham, who subsequently described the species. 



Habitat : California. 

 Theristis Hiibner. 



Forewings very long and narrow ; apex strongly produced, with erect scale tufts, 

 12 veins, 7 and 8 stalked, 7 to ternum, 2 and 3 connate. Tuft on second joint of 



