REHN AND HEBARD 157 



the species becomes type of the genus Conocephalus. This 

 unfortunate condition has been remarked by certain authors in 

 recent years, and requires the abandonment of the name Cono- 

 cephalus for the large cone-headed katydids to -which it has 

 generally been applied, and its use for the present genus, which 

 appears in most literature under Xiphidion or Xiphidium. 



The name Anisoptera of Latreille, 1829, was based on two 

 species, dorsalis and brachypterus; the former has been selected 

 as the type of Anisoptera ])y Kirby,*^ the latter is a member of 

 the Decticinae. Karny "^ takes exception to the use of Anisoptera 

 for the present genus by Kirby; the latter 's non-use of Cono- 

 cephalus is apparently incomprehensible to him, but is probably 

 due to Kirby's personal objection to the use of tautonymic names, 

 which objection has been shared by numerous workers. 



Walker's genus Palotta, 1869, includes the single species 

 inornata, which has been synonymized by Kirby under Xiphi- 

 dium iris of Stal. 



Classification. — Karny has recently divided the present genus 

 into five subgenera.^ His new Xeoxipkidion includes thirtj-'-two 

 species and in the absence of a designated genotype we select 

 C. {X .) fasciatus (DeGeer). The subgenus XtpAid^'on Serville has 

 the type fixed by Kirby ^ as fuscum (Fabricius). Karny 's new 

 Thecoxiphidion includes six species and, in the absence of a desig- 

 nated genotype, we select C. (T.) strictus (Scudder). The subgenus 

 Palotta F. Walker has inornata {iris Serville) type by monotypy, 

 while the tj'pe of the subgenus Conocephalus is C. (C.) conocephalus 

 by tautonymy, as discussed above. Of these subgenera we find 

 Xiphidion, Palotta and Conocephalus possessing sufficient and 

 distinguishable characters, but under Xiphidion we must place 

 Xeoxiphidion and Thecoxiphidion. The first of these is separated 

 by Karny by the male cerci being heavy, depressed and short 

 distad, the majority of species American, in contrast to Xiphidion 

 having the male cerci slender, acuminate, not or but little de- 

 pressed distad, the majority of species from the Eastern Hemi- 

 sphere. Study of the genotypes and the numerous species of the 



« Syn. Cat. Orth., ii, p. 274, (1906). 



' Verb. k.-k. zool.-botan. Gesell. Wien, lix, p. 27, (1909). 

 * Gen. Ins., Orth., Subf. Conoccphalinae, p. 8, (1912). 

 'Syn. Cat. Orth., ii, p. 274, (190()). 



TRANS. AM. ENT. SOC, XLI. 



