FAMILY VII. TETTIGO.XIIILK. THE KATYDIDS. 



forms, under the International nomenclature rules, type designa- 

 tion by tautonoiny and in consequence the species becomes the type 

 of the genus Conocephalus" 6 * 



Kirby (190G, 274) did not adopt this ruling but included the 

 species formerly known as Xipliidion Serv. (1831) and Xiphicliuni 

 Burmeister (1838) under the name Anisoptera Latreille (1820) 

 which has priority over both. While I personally believe that 

 the International ruling in this case is technical, arbitrary and 

 nonsensical, I have followed it for two reasons, (a) It has been 

 adopted by R. & H. in their synopsis of the genus and by other 

 recent American writers, and not to adopt it would cause more 

 confusion than even now exists. (//) If not adopted the name 

 Anisoptera would have priority over Xipliidion and Xiphidiuin 

 and a change of name would anvhow be necessarv. 



/ .' 



The genus Conocephalus as here recognized comprises a large 

 number of species and is represented in all parts of the world. 

 Kirby included 1)1 species under Anisoptera, 14 of which were 

 from the United States, but of these several are known synonyms. 

 Since his catalogue appeared seven additional species have been 

 described by Caudell, R. & H. and Fox. In their synopsis of the 

 North American forms R. & H. recognized 10 species and one 

 variety. Of these 13 occur in the territory covered by this work. 

 The portions of the following key pertaining to the male cerci 

 and other characters of that sex are based largely on the key of 

 R. & H. in their synopsis which was for the males only. 



Fig. 188. Outlines of subgenital plates of males of Conocephalus. a, allardi; b, fas- 

 ciatus, X 5-5- Extremities of hind tibiae of Conocephalus, X -'- c - fasciattis; d, sal- 

 tans, e m, Outlines of male cerci of Conocephalus. X I0 - e > allardi', f, fasciatus', g, 

 gracillitnus; li, brevipennis; i, nemoralis; j, strictns; k, stictomcrus ; 1, aigiaius; m, 

 nigropleunis. (After R. & H.) 



KEY TO EASTERN SPECIES OF COXOCEPHAH S. 



a. Hind tibiae armed at apical extremity with three pairs of spurs (Fig. 



69 Caudell (Ms.) also states that the properly designated type of Xipliidion has been 

 proven to be congeneric with the (jrvllns (Tettif/oiiia) coiioccphahis of Linnaeus, of 

 which Conocephalus hemipterns Thunberg, the type of the genus Conocephalus is a 



Enonym. As we cannot change the type of Xiphidion and its type is in the older genus 

 inoccphalus, it falls in synonymy under that genus. 



