DEC. 4, 1921 CAUDELi^: the phaneropterae 487 



to emphasize the desirability, for archaeological as well as for petro- 

 logical reasons, of a better knowledge of the volcanic rocks of Central 

 Arnerica and Mexico. 



ENTOMOLOGY. — On the Orthopterous group Phaneropterae ( = 

 Scudderiae) , with descriptions oj a new genus and species.^ A. N. 

 CaudelIv, Bureau of Entomology. 



The genus Phaneroptera was erected by Serville in 1831,- with two 

 originally included species, Locusta lilifolia Fabr., and Locusta curvi- 

 cauda DeGeer. The only designation of genotype for this genus, so 

 far as now known to the writer, was by Kirby in 1906,^ when the 

 Gryllus falcatus of Poda was so indicated. In his treatment of this 

 matter Kirby followed Brunner in considering the Locusta lilifolia 

 included by Serville as being a misdetermination, the real species 

 being presumably the Gryllus falcatus of Poda. But, when an author 

 names a particular species as originally included in a genus that species 

 is presumed to be correctly determined, the sane and only rational 

 reasoning applying, it seems, as in the case of genera based wholly on 

 a misdetermined species, and covered by opinion No. 65 of the Inter- 

 national Code of Nomenclature and by paragraph No. 96 of the 

 Entomological Code. Thus the Fabrician lilifolia included by Serville 

 in his genus is not to be considered a misidentification, and is eligible 

 for genotype citation. The designation by Kirby of the non-included 

 species falcatus being invalid the genus Phaneroptera is therefore as 

 yet without a designated genotype, and one of the two originally 

 included species, lilifolia and curvicauda, must be selected as the type. 

 The first of these species, Locusta lilifolia Fabr., is the genotype of the 

 monobasic genus Tylopsis of Fieber, 1858. The second species, 

 Locusta curvicauda DeGeer, is the type of the genus Scudderia of Stal 

 1873, by original definite designation and by virtue of being the sole 

 species of that monobasic genus. Now paragraph 98a and 101 of 

 the Entomological Code and opinion 6 of the International Code re- 

 strict one to the selection of curvicauda as genotype, which I here- 

 by do by definitely designating Locusta curvicauda DeGeer as the 

 genotype of the genus Phaneroptera of Serville. This selection, 

 being in accord with both recent codes governing such matters, can 

 scarcely fail to meet with the approval of most nomenclatorialists. 



^ Received October 21, 1921. 



2 Ann. Sci. Nat. 22: 158. 



3 Syn. Cat. Orth. 2:'434. 



