334 OETHOPTERA. 



1. Perixerus squamipennis, Gerstaecker. 



Perixerus squamipennis, Gerst. Stett. ent. Zeit. xxxiv. p. 192 (1873) a ; Rehn, Proc. Acad. Nat. Sci. 

 Philad. 1904, p. 541 2 . 



Hab. Mexico 12 . 



The present species is not represented among the material studied. 



2. Perixerus laevis, Rehn. (Tab. ill. %g. 20, 20 a, s .) 



Perixerus lavis, Rehn, Trans. Am. Ent. Soc. xxvii. p. 98 (1900) ' ; Proc. Acad. Nat. Sci. Philad. 

 1904, p. 541 \ 

 Ilab. Mexico, Jalisco {Schumann : 1 6 , 2 $ ), Eslava, Distrito Federal \ 



The male agrees well with the female in colour and in having the surface generally 

 glabrous. Its dimensions are as follows : — Length of body 17*5 ; of pronotum 4, of 

 tegmina 4*1, of hind femora 10*5 miliim. 



species. Jt is quite probable, therefore, that the locality assigned to the insect as a habitat is an error 

 (see also the remarks concerning the possible affinities of this insect, anted, p. 222). 



PEGASIDION, Saussure. 

 Pegasidion, Sauss. Rev. et Mag. Zool. (2) xiii. p. 319 (1861) ; Orthopt. Nova Amer. ii. p. 21 (1861). 



The present genus is placed under " (Edipodiformes " by Saussure, but, as stated in the footnote on p. 222, 

 anted, the " prosternum cornu cylindrico armatum " in the generic description as given by him inclines one 

 to think that his specimen belonged either to the Pyrgomorphinae or the Acridiinse. Nothing among the 

 material studied seems to come anywhere near it. It calls to mind the members of the genus Paropomala as 

 characterized on pages 39-41, with P. pallida as a bare possibility of being the insect described by Saussure. 



1. Pegasidion volitans, Sauss. 

 Pegasidion volitans, Sauss. Eev. et Mag. Zool. (2) xiii. p. 319 (1861) 1 ; Orthopt. Nova Amer. ii. p. 21 (1861) 2 ; 



Thorn. Syn. Acrid. N. Am. p. 198~(1873) 3 . 

 Hab. Mexico 1 " 3 . 

 No specimen has been found among the material studied which could be placed here. 



HE1U1ISTEIA, Stal. 

 Hermistria, Stal, Recens. Orthopt. i. pp. 33, 52 (1873). 



According to Stal the present genus is related to, or at least reminds one of, Dactylotum. His description 

 is so meagre that it has been impossible to place Hermistria definitely in the series of genera, and for this 

 reason it was omitted from the Table, anted, pp. 209-222. 



1. Hermistria pulchripes, stal. 



Hermistria pulchripes, Stal, Eecens. Orthopt. i. p. 52 (1873) ' ; Scudd. Ind. K. Am. Orthopt. p. 138 (190.1) 2 . 



Hab. Mexico 12 . 



This insect is unknown to the present writer. The colour " olivacea ; pedibus nigris " does not belong to 

 any group thus far recognized among the large amount of material studied. 



