642 FAMILY VIII. GRYLLID^E. THE CRICKETS. 



d. Body subspherical, wingless; pronotum covering the occiput 

 and eyes, the latter very small; hind femora ovate, very 

 strongly swollen; hind tibiae armed above with only a few 

 movable spines. (Ant-loving crickets). 



III. MYRMECOPHILIN.E, p. 659. 



dd. Body more elongate, usually winged; occiput and eyes not cov- 

 ered by pronotum, the eyes well developed; hind femora more 

 elongate, not exceptionally swollen. 



e. Hind tibia? armed above on both margins with minute teeth, 

 but no spines; body covered with translucent scales; prono- 

 tum of males usually prolonged backward; species wingless 

 or males usually wih very short membranous tegmina. 

 (Wingless bush crickets.) IV. MOCOPLISTIX^E, p. 662. 



ee. Hind tibise armed above with two rows of spines; body not 

 covered with scales; pronotum not prolonged backward in 

 either sex; tegmina always present, sometimes much ab- 

 breviated. 



f. Head short, vertical or nearly so; hind tibiae rather stout, 

 armed with stout spines without teeth between them; 

 ocelli present; color black or brown. (Ground and field 

 crickets.) V. GRYLLIN.E, p. 670. 



ff. Head elongate, horizontal; hind tibiae slender, armed with 



delicate spines (except in the genus Neoxabea) with 



minute teeth between them; ocelli absent; color white or 



pale green. (White tree crickets.) VI. OECANTHIN.E. p. 709. 



a. Second tarsal joint distinct, depressed, heart-shaped. 



g. Hind tibiae armed above with two rows of spines without teeth be- 

 tween them and with only two apical spurs on inner side; ovi- 

 positor in our species compressed and distinctly upcurved. 

 (Small brown or black bush crickets.) Vll. TRIGOXIDIIXJE, p. 728. 

 gg. Hind tibia? armed above with two rows of spines with small 

 teeth between them, the apical spurs three on both outer and 

 inner sides; ovipositor in our species subcylindrical, but little 

 upcurved. (Larger brown bush crickets.) 



VIII. EXEOPTERIX.E, p. 737. 



Subfamily I. GRYLLOTALPINJE. 



THE MOLE CRICKETS. 



Crickets of large size, having, in addition to characters given 

 in key, the antenna? much shorter than body; eyes very small; 

 pronotum subcylindrical, arched, prolonged more or less back- 

 ward, its hind margin rounded; lateral lobes with lower margin 

 straight or concave, oblique ; tegmina somewhat triangular, usual- 

 ly abbreviated; wings often fully developed; fore femora dilated 

 and compressed; fore tibise with a tympanum on outer face, 

 strongly dilated, coarsely toothed ; middle and hind legs slender, 

 compressed; hind femora slender, scarcely saltatorial, divergent 

 from the body; abdomen cylindrical, its apex obtuse, 9-joiuted, 



