62 GUIDE TO ORTHOPTEKA 



GRYLLIDAE. 



All six of the subfamilies of Gryllidae occur in the United 

 States, since all are cosmopolitan ; no similar case occurs among 

 the Orthoptera, Here also, more than in the other groups, may 

 be seen a nearer correspondence to the European fauna, many 

 more of the genera being identical than is usual in Orthoptera. 

 The following table distinguishes the subfamilies. 



Subfamilies of Gryllidae. 



A. 1 . Tarsi compressed, the second joint minute, compressed. 

 b 1 . Fore legs f ossorial ; female without ovipositor ; tympanum 

 of male tegmina (when present) without speculum. 



Gryllotalpinae. 



b 2 . Fore legs gressorial ; female with ovipositor, though it is 

 sometimes rudimentary ; tympanum of male tegmina (when 

 present) furnished with a speculum. 



c 1 . Hind tibiae biseriately serratulate but not spined, or, if 

 spined (Myrmecophila), then the body is subspherical and 

 the hind femora exceptionally gibbous. Myrmecophilinae. 

 c 2 . Hind tibiae biseriately spined, the body always sub- 

 elongate, with relatively slender hind femora. 



d 1 . Hind tibiae rather stout, armed with stout spines, not 



serrulate between them Gryllinae. 



d" 2 . Hind tibiae slender, armed with delicate spines, and 

 serrulate between them. . . . Oecanthinae. 

 A 2 . Second joint distinct, depressed, cordif orm. 



b 1 . Hind tibiae biseriately spinose, not serrate, the apical 

 spurs two in number on the inner side. Trigonidiinae. 



# 2 . Hind tibiae biseriately spinose and also serrate, the apical 

 spurs three in number on both sides. . Eneopterinae. 



GKYLLOTALPINAE. 



Two of the three tribes of this subfamily are represented with 

 us, the third being an Australian type ; both these they share 

 with the Old World, as well as with tropical America. 



