Bruner: South American Crickets. 347 



c. Posterior tibiae biseriately spinose. 



d. The hind tibiae armed with spines on both sides, the carinae not at 

 all serrated. 

 e. Hind tibiae armed with long, movable, hairy spines. The posterior 

 metatarsi unarmed above, or provided with but a single row of 



serrulations N emobiida . 



ee. Hind tibiae armed with heavy fixed spines, or in some instances 

 spines partly movable. Head globose, or very gently depressed ; 

 the face vertical. The front between the antennae neither 

 swollen nor produced. The superior or upper claw of the hind 

 tibiae shorter than the middle one, or of equal length. Ocelli 

 disposed in a triangle. Hind femora shorter than the combined 



length of the tibiae and tarsi AchetidcE. 



dd. Posterior tibiae on both sides of the basal portion serrated, of the 

 apical portion spined. Tegmina either abbreviated or wanting. 



Gryllomorphidce . 

 cc. Posterior tibiae usually biseriately serrulate. Without spines on their 

 lateral margins, but sometimes having them present in their middle 

 towards the apex. 

 d. Body subspherical, apterous. Antennae heavy, subfiliform. Hind 

 femora enormous, dilated, oval. Eyes subobsolete, minute. An- 

 terior tibiae without auditory apparatus. Hind tibiae without 

 serration and provided above near their middle with several mov- 

 able spines; apex with only three or four claws. . . Myrmecophilida. 

 dd. Body subelongate. Antennae slender, setaceous. Eyes distinct 

 Posterior femora more slender, clavate; hind tibiae slender, pro- 

 vided at apex with six claws. Body covered with scales. In the 

 females apterous, in the males provided with membranous tegmina. 

 Anterior tibiae sometimes provided with auditory apparatus. 

 Hind tibiae serrulate, not spinose, provided with elongate claws. 



Mogoplislida. 



bb. Posterior tibiae slender, armed on the lateral edges with slender spines, 



between which the canthi are serrulate. Male tegmina with the 



speculum divided by one, two, or more, veins. 



c. Apex of the posterior tibiae provided with five claws; on the inside two, 



on the outside three PentacentridcB. 



cc. Apex of the posterior tibiae provided with six claws; three inside, three 

 outside. 

 d. Head vertical, vertex short, mouth inferior or below. All the tibiae 

 armed with movable spurs. The male speculum of the tegmina 



(when developed) divided by two veins PhalangopsitidcE. 



dd. Head elongate, horizontal, mouth directed to the front. Pronotum 

 slender, longer than wide, the lateral lobes narrowed anteriorly. 

 Anterior and middle tibiae without spurs. The speculum of the 



male tegmina divided by a single vein CEcanthidce. 



A A. Tarsi with the second joint depressed, heart-shaped. 



b. Posterior tibiae not serrated, biseriately spinose, and provided on each side 



