XOVITATES ZOOLOGICAE XXIV. 1917. 399 



adopt for haroldi the generic term TympanopJiora of Laboulbene. Now, Mr. 

 Oberthiir in Fasc. VI. of his Etudes Comparees, on pp. 149-151, tells us most 

 precisely that in 1864 Rambur and Laboulbene quite independently of one 

 another erected for the species pndica Esper the genera Cymbalophora and 

 Tympanophora, both having reference to the peculiar stridulating organ of the 

 (J. Rambur's name of Cymbalophora has several months' priority. The Inter- 

 national Rules of Nomenclature, however, declare that " generic " as well as 

 " specific " names which apply to one and the same species or group of species 

 are synonyms and cannot be used for anything else at a future time. There- 

 fore Mr. Oberthiir's use of Tympanophora for haroldi, now that he considers it 

 different generically from pudica, is absolutely inadmissible, as Tympanophora 

 is an absolute synonym by " Iffonotypy " of Cymbalophora, the latter having 

 priority by several months. The erection of a new generic name for haroldi 

 does not, however, in my opinion, arise ; for Sir George Hampson, to whom I 

 submitted my haroldi, says that it decidedly belongs to Cymbalophora and stands 

 nearest to rivularis, with which it shares the phenomenon of abortive wings in 

 the $. 



1 (J Guvlt-es-St«l, September 1913, Faroult. 



2 SS, 1 9 Aflou, September 1911, H. Powell ex coll. Oborthiir. 



The specimen from Guelt-es-Stel is identical with Mr. Oberthiir's fig. 1046, 

 pi. c.Kix. Etud. Lipid. Comp. VI. ; one of the 2 (J (J from Aflou i.s like fig. 1045 

 of the same plate, wliile the second is intermediate both in size and colour ; the 

 ? is intermediate in shape between the 2 $? £f. 1048 and 1049 on above plate, 

 but has more black on the forewings than either. While at Aflou this insect is 

 so abundant as to be a perfect pest and scourge, devouring all the barley, on the 

 Hants Plateaux of the Provinces of Alger and Constantine it appears very rare, 

 the only specimens recorded being my single Guelt-es-Stel ^ and 2 cJcJ taken by 

 Harold Powell at Lambcssa. (In addition to my above remarks on Tympano- 

 phora it is quite precluded from use in Mr. Oberthiir's sense, as it was applied to 

 a genus of Orthoptera by White in 1841.) 



127a. Euprepia libyssa libyssa Piingl. 



Euprcpid libi/ssa Piingler, Societ. Eiiiom. xxii. p. 25 (1907) (Magenta). 



On p. 162 of Fasc. VI. of his Etudes Comparees, Mr. Oberthiir records the 

 fact that Count Turati had already discovered that the names caligans Turati 

 and powelli Oberthiir were antedated by libyssa Piing. ; but that he, Mr. 

 Oberthiir, declined to accept libyssa as valid because it was unaccompanied by 

 any figure. Count Turati described his caligans from Sicily, and Mr. Oberthiir 

 tells us that on comparison with his series it proves to be a somewhat different 

 local race, therefore the two forms must stand as follows : 



Euprepia libyssa libyssa, Piingl., Mauretania, and Euprepia libyssa caligans, 

 Trti., Sicily. 



1 <J Sebdou, October 1907, H. Powell ex coll. Oberthiir. 

 20 <JcJ 2 ?? Guelt^es-Stel, September and October 1913, Faroult. 



