62 GUIDE TO ORTHOPTERA 



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 faima, 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 ^. Fore legs fossorial ; 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 ^. Hind tibiae biseriately serratulate but not spined, or, if 

 spined (Myrmecophila), then the body is subspherical and 

 the hind femora exceptionally gibbous. Myrmecophilinae. 

 c2. Hind tibiae biseriately spined, the body always sub- 

 elongate, with relatively slender hind femora. 



f?i. Hind tibiae rather stout, armed with stout spines, not 

 serrulate between them. .... Gryllinae. 

 d^. Hind tibiae slender, armed with delicate spines, and 

 serrulate between them. . . . Oecanthinae. 



A ^. Second joint distinct, depressed, cordiform. 



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

 spurs two in number on the inner side. Trigonidiinae. 



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

 spurs three in number on both sides. . Eneopterinae. 



Gryllotalpinae. 

 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. 



