L'tI Wal.sinpfliatn on Asintir Tintiici'hi*. H()9 



from tlie sniallor nvcn. of Japan may in some degree accou n 

 for an iin|)rrssittn wliicli tiirtlicr rcscareli may prove erroneou s 

 A curious instance of structural (.liver<;ence, scarcely amount- 

 in'^ to special (litfcrcnce, occurs in the familiar Olethreutes 

 arcueUa, Clerck. The late Dr. Clemens fouiuleJ the North- 

 American genus Exartema on the strength of ii lobe depending 

 from the limbus in the hind wings, a character not occur- 

 ring in the genus PeiUhina^'Vv. (Stgr. Cat.). The Japanese 

 specimens o\ arcue//a, althougli identical with British examples 

 in colour and markings, have a short lobe in the position 

 occupied by that of Exartema^ and a careful examination of 

 English specimens reveals the fact that the same excrescence 

 exists liere in an aborted (or undeveloped) form : thus the 

 Japanese Ohthreutes closely approaches Exartema and tends 

 to connect our arcuella with tlie s|)ccies of that genus existing 

 in the Western and Eastern States of America, some of 

 which occur also in Japan. 



In sending for publication a few descriptions of new 

 Asiatic Tortn'cida-, I renew the expression of my grateful 

 thanks to my numerous correspondents. 



In all cases where specimens have been purchased from 

 Dr. Standi nger, I have adopted his or Herr Bang Haas's MS. 

 names with a view to facilitate identitication, although I 

 had previously named the species differently in my own MS. 

 descriptions from specimens already in my collection. 



OXYGRAPIIA, Hb. 

 n. syn. = RnAC0DiA, lib 



§i'£i(0.vi:.l, Crt., =fOxirili.lI'Il.l, lib. |;OXYGRAPHA,Wilk., = RUACODIA, 



IIb.,= Teras, TT.,=*TEitAs, lleiu.,=*AcALLA, Meyr. 



In the European lists the emargination of the costa in the 

 fore wings is relied upon as a generic character for separating 

 Bhacodia, Hb. { = Teras, Tr.) from *Teras, Hein., &c. 

 Prof. Fernald in his Catalogue of North-American Tortri- 

 cida; (1882) included both forms in Teras, Tr., evidently 

 regarding the amount of excavation as only a special character. 

 If any doubt existed as to the correctness of Prof. Fernald's 

 action, full justification will be found among the species now 

 described, some of which arc intermediate between Rhacodia^ 

 Hb., and Teras, Hein., and might be referred to either. 



649 (1). O.vi/grapha quadridentanaj sp. n. 



Antcnnrr dull fawn-grey. [Palpi missing.] Jlead pale 

 fawn-colour. Thorax reddish fawn-colour, posteriorly paler. 

 Fore icings reddish green; the convexity on the costa adorned 

 with four conspicuous teeth or tufts of scales, the first and 



Ann. & Mag. N. Hist. Ser. 7. Vol. v. 24 



