14 PROCEEDINGS OF THE NATIONAL JiWSEUM. vol. xxxii. 



ARGYRESTHIA OREASELLA Clemens. 

 Plate IV, fig. 9. 



ArgyrestJiia oreaseUa Clemens, Proc. Acad. Nat. Science, Phila., 1860, \i. 7; 



Stainton's ed. Tin. N. Am., 1872, pp. 39, 93.— Chambers, Can. Ent., VI, 



1874, p. 10.— BuscK, Proc. Wash. Ent. Soc, V, 1903, p. 193. 

 Argyresihia anderegrjieUa Zeller (not Duponchel) Ver. Zool. bot. Gesell. Wien, 



XXIII, 1873, p. 304.— Chambers, Can. Ent., VII, 1875, p. 145; Bull. U. S. 



Geol. Survey, IV, 1878, p. 130.— Dyar, Bull. 52, U. S. Nat. Mus., 1903, No. 



6455. 

 Argyri'stliid aiiduegieUa Chambers, Bull. U. S. Geol. Surv., Ill, 1877, iip. 131, 141. 



Labial palpi silvery white; face faintly tinged with golden; head 

 white; antennte white, with dark-brown annulations. Thorax white. 

 Forewings silvery white, with a pale golden streak from base of costa 

 diverging slightly from costal edge; from the middle of the dorsal 

 edge runs a broad golden fascia, somewhat outwardly oblique, across 

 the wing, tapering strongly toward costa, which it hardly reaches, 

 but where it is substituted by two minute golden- brown dots. From 

 costa, just beyond these dots, and nearly touching the tip of the iirst 

 fascia, runs a narrower, outwardly oblique golden fascia to tornus; 

 this fascia emits from its middle a broad branch toward apex, which 

 divides into three smaller branches, two of which reach the costal and 

 one the dorsal edge; all the golden markings except the basal streak 

 are edged with dark-brown scales; around apical edge is a narrow 

 brown line before the cilia, which is dark-golden fuscous. Hindwings 

 dark gray. Forewings with veins 7 and 8 separate. 



Alar empanse. — 13 mm. 



It is with some reluctance that 1 must disagree with all former 

 writers on this species, among whom are such careful workers as 

 Stainton and Zeller, who have made this species a synonymn of the 

 European anderegglella Duponchel. I was led to accept this s3"non- 

 omy in ,a former paper^ by trusting to the determination of several 

 American specimens in U. S. National jNIuseura, which were collected 

 and named b}^ Lord Walsingham; ])ut critical stud}" of a large series 

 of European specimens show^s definite and constant difi'erences in the 

 ornamentation between the European and the American forms, and 

 Clemens''s name therefore should l)e retained for the latter. 



In the U. S. National Museum are specimens of this species, collected 

 and determined by Lord Walsingham, from Mount Shasta, California; 

 also specimens from Cornwall, Idaho (Piper); New York, Beuten- 

 miiller; Missouri (Miss Murtfeldt), Ontario (Hanham), and Beulah, 

 New ]\Iexico(Cockerell). 



Chambers recorded the species from Colorado, where he took it 

 among oaks, and as Miss Murtfeldt's specimens also were captured 



« Proc. Wash. Entom. Soc, V, 1903, p. 196. 



