8 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxii. 



mens, in some eases the types, on which this paper is based. They 

 will prove a valuable aid in the identification of tiio species under 

 consideration. 



Meyrick has grouped " the European species of Ar<j[/rextJ(la, accord- 

 ing- to whether they have veins 7 and 8 in the forewings stalked or 

 separate. I am unable to class the American species by this character 

 in any natural secjuence, and believe the character quite unimportant 

 as indicating natural groups; the stalked veins are generall}' found in 

 the small species and the separate veins in the broader winged species 

 irrespective of other affinities. Thus I can not recognize the pro- 

 prietj'^ of the generic name Blastottre Katzeburg, 1840, recently 

 reintroduced and advocated by Lord Walsingham'' for the species 

 with veins 7 and 8 stalked, Meyrick's section A. The character, 

 however, is constant within the species and may thus with advantage 

 be an aid in determining the species. I have therefore noted the 

 condition under the description of each species. 



It is hoped that no American reference of anv consequence has been 

 omitted, but of European references only the original description 

 and Standinger and RevePs Catalogue of European Lepidoptera are 

 included. 



ANALYTICAL KEY TO ARGYRESTHIA. 



Forewings with metallic golden or bronzy markings 1 



Forewings with nonmetallic brown or fuscous markings 13 



1. With four straight transverse fasciae quadrixtri ella p. 9 



Without such fascite 2 



2. Thorax golden , 3 



Thorax white 6 



3. With golden fasciae 4 



Without fasci;e 5 



4. With forked central fascia gicildrirlki p. 1 2 



Without such fascia " tliomceJbt p. 9 



5. Forewings with dai'k transvei-se striation deletella p. 16 



Forewings without such cnprefn^rlla \k 10 



6. Head pure white 7 



Head golden ocherous white j)i/(/v);rc//a j). 1 3 



7. Markings dark browniish, at least at th(> edges 8 



Markings light yellowish 9 



8. With complete central fascia - im^cfiptella p. 15 



Without such nreasdla p. 14 



9. With black apical spot - 10 



Without such spot 12 



10. Golden color diffused and jirevailing frri/i'Jla \). 1 1 



White color prevailing markings sliari) 11 



1 1 . AVith forked central fascia annettella p. 1 2 



Without such , ajtk'hiiacnlella p. 15 



12. Entire dorsal edge white suhrelirulata p. Ifi 



Golden markings extending to dorsal edge querricnlella p. 1 1 



« Handbook of British Lepidoptera. 



&Ent. ]\Io. Mag., XVII, p. 169, August, 1906. 



