PEEIXEEUS. 333 



PERIXERUS, Gerstaecker * 

 Perixcrus, Gerst. Stett. ent. Zeit. xxxiv. p. 192 (1873) ; Rehn, Trans. Am. Ent. Soc. xxvii. p. 98 

 (1900) ; Proc. Acad. Nat. Sci. Philad. 1904, p. 541. 



The members of the present genus are rather brightly coloured like the various 

 species of Dactylotum, and, like most of the representatives of that genus, are confined 

 to Mexican territory. The species may be separated as follows : — 



Synopsis of the Species of Perixerus. 



A 1 . Prothorax, tegmina, and legs densely pubescent. General colour of 



head, legs, and pronotum cinnamon or ferruginous 1. squamipennis, Gerst. 



A 2 . Prothorax, tegmina, and legs not densely pubescent. General colour 

 olivaceous or oil-green. 

 b\ Prevailing colour above deep olivaceous. Head and pronotum with 



a central line of crimson. Hind tibiae light olivaceous .... 2. leevis, Rehn. 

 b 2 . Prevailing colour oil-green and lemon-yellow varied with verditer- 



blue. Hind tibiae glaucous 3. variabilis, Rehn. 



* PCEPEDETES, Saussure. 



Pcepedetes, Sauss. Eev. et Mag. Zool. (2) xiii. p. 158 (1861) ; Thorn. Eep. U.S. Geol. Surv. Terr. v. p. 220 

 (1873). 



Evidently related to Dactylotum, Charp., and Perixerus, Gerst., the species of both these genera possessing 

 bright red and orange markings on a rather dark background. The type of Pcepedetes is from Mexico. 



l. Poepedetes corallinus, Sauss. 



Pcepedetes corallinus, Sauss. Eev. et Mag. Zool. (2) xiii. p. 158 (1861) 1 ; Thorn. Syn. Acrid. N. Am. p. 221 

 (1873) 2 . 



Hab. Mexico 1 2 . 



PEDIES, Saussure. 



Pedies, Sauss. Eev. et Mag. Zool. (2) xiii. p. 157 (1861); Thorn. Syn. Acrid. N. Am. p. 221 (1873). 



The description of the present genus is even less definite than that of the preceding. It may, however, be 

 related to Pcepedetes and to Dactylotum. Only a single species is mentioned. 



l. Pedies virescens, Sauss. 



Pedies virescens, Sauss. Eev. et Mag. Zool. (2) xiii. p. 157 (1861) 1 ; Thorn. Syn. Acrid. N. Am. p. 221 (1873) \ 

 Hab. Mexico 12 . 



CALACEIS, Walker. 

 Ctdacris, Walk. Cat. Dermapt. Salt. Brit. Mus. iv. p. 639 (1870); Thorn. Syn. Acrid. N. Am. p. 227 (1873). 



Walker included in this genus species of such diverse structure as are now placed in Diponthus, Zoniopoda, 

 Coscineuta, Osmilia, and Vilerna. The only representative of his genus recorded from " Biologia " territory is 

 C. pudica, Walk., which he compares with Acridium (Diponthus) permistum, Serville. So far as the present 

 writer is aware, no insect has since been recorded from Mexico that could possibly be referred to Walker's 



