1901.] - 189 



REVISION OF THE NOMENCLATURE OF MICRO-LEPIDOPTERA. 

 BY THE RIGHT HON. LORD WALSINGHAM, M.A., LL.D., F.R.S., &c., 



AND 



JOHN HARTLEY DURRANT, F.E.S., Memb. Soc. Ent. de France. 

 (Continued from Vol. XXXVI, p. 4). 



" HEUSIMENE, 8teph." ! 

 This nauie has long been used in British Lists for a genus con- 

 taining the single species Tortrix fimbriana, Hw. It was accepted 

 without question by the authors of " The Accentuated List of the 

 Tiritish Lepidoptcra," 70 (1858), who gave the derivation thus: — 

 " Ueusimene., Ste., . . eueii', to burn, /A^/i/r;, the moon : the fore- 

 wings having an ashy lunule on the inner margin." This ingenious 

 derivation however is as fictitious as Heusimene itself. There never 

 was a genus ^ro/josec/ under the name -£feMsme»e, it is a meve lapsus 

 calami ior Hemimene, Hb. ('>//At=half ; ixrjvrj^moow) . 



"Heusimene, Hiibner ? " Steph. Til. Br. Ent., Haust. IV, 96-7 

 (1834), typejimbriana, Hw. 



Stephens referred this genus to Hiibner with a " ?," not because 

 he doubted the generic name being Hiibner's, but because he was 

 uncertain whether Jlmbriana could be regarded as congeneric with the 

 types of Hemimene, Hb. In his abstract of the British Lepidoptera 

 contained in Hiibner's Verzeichniss, Stephens [111. Br. Ent., Haust. 

 IV, 418 (1835)] enumerated Heusimene 3627—3634, 3636. The 

 names cited are identical with those included in Hemimene by Hiibner, 

 3627—3637. 



It is, therefore, obvious that Stephens or the compositor (probably 

 the latter) read the first " ni^ " of HeM.imene as " us.'' 

 Thus originated " Heusimene, Stephens." ! 

 Heusimene, Steph., List Br. An. BM., X, Lp. 52 (1852). 

 Stephens in this publication attributes "iZ^f?^(^6•me7^p, Stephens," to 

 himself as a valid genus, ignoring its evolution as detailed above, 

 although he used its correct form " Hemimene, Hiibner," in a sub- 

 generic sense under more than one of his own generic titles. 



A name whose only claim to validity is based on a mere lapsus 

 calami (or error of P.D.) can have no right to recognition, and 

 ^Heusimene (Hb.), Steph., can only be treated as if it had been 

 printed correctly Hemimene, Hb. 



PAMMENE, Hb. 



= Hemimene, Hb. {\Heusimene, Stph.) ; = Fiiti/okoblastis, Ld. 

 Type 1, Tortrix trauniana, Schiff. (Hb., 1826). 



