Vol. XXVlii] ENTOMOLOGICAL NEWS. IO7 



Some Critical Notes on the Giant Katydids Forming 



the Group Steirodontia (Orthoptera, 



Tettigoniidae, Phaneropterinae). 



By JAMES A. G. REHN, Academy of Natural Sciences, Phila- 

 delphia, Pa. 



(Plate X.) 



The notes gathered together in this paper have accumulated 

 while studying the material of this group contained in certain 

 large South and Central American and West Indian series of 

 Orthoptera, now in our hands for determination. The remarks 

 are grouped under the genera considered, but, aside from the 

 revision of the forms of the Stilpnochlora marginclla group, 

 they are not presented as exhaustive or final, instead being 

 intended merely as suggestions, to help the future student who 

 has before him more material of this group of most interesting 

 and striking species. 



STILPNOCHLORA Stal. 

 1873. Stilpnochlora Stal, Ofvers. K. Vetensk.-Akad. Forhandl., 1873, 



No. 4, p. 40. 

 1906. Microccntrum Kirby (not of Scudder, 1862, as restricted), 



Synon. Catal. Orth., II, p. 455. 



Genotype : Phylloptcra marginclla Serville (by original des- 

 ignation). 



Kirby is quite in error in considering Microcentrum the 

 proper name for this genus. It is in part Microcentrum of 

 Scudder, but the genotype of the latter genus was properly 

 selected by us as affiliatum Scudder (=rhoinbi 'folium Saus- 

 sure). 1 As shown at the time of our selection of the geno- 

 type, Kirby selected as genotype of Scudder's genus a species 

 not included in the genus by Scudder, so his fixation is er- 

 roneous. The action taken by us retains the names in their 

 time-honored positions and is in accord with Article 30 of the 

 Revised International Code of Zoological Nomenclature. 



The known species of the genus Stilpnochlora are all before 

 us at present, with the exception of Saussure and Zehntner's 

 ovalifolia, which was described from Brazil, 2 and concerning 



'Proc. Acad. Nat. Sci. Phila., 1908, p. 398 (1908). 

 "Biol. Cent.-Amer., Orth., I., p. 369 (1898). 



