348 Annals of the Carnegie Museum. 



with three movable spines; the apex sometimes furnished with two claws 

 on the inner side. Female ovipositor short and curved ; speculum of the 

 tympanum ot the male tegmina undivided. Size of insects small. 



TrigoniJiida. 

 bb. Posterior tibiae usually, but not always, serrated, also spined on both sides, 

 the apex furnished with three spurs on each side. Ovipositor straight 

 or a very little curved; speculum of the tympanum of the male tegmina 

 divided bs' one (or sometimes two) veins. Size of insects medium to 

 large. 

 c. Claws of the posterior tibiae elongate, the intermediate one on each side 

 much longer than the upper. Metatarsi elongate. Pronotum an- 

 teriorly coarctate, the angles somewhat acute, lateral lobes oblique, in 

 front angulate. Head robust or large, eyes prominent at sides; 

 tegmina of moderate size and of the usual form, the lateral field bent 

 down at right angle; in the males with the tympanum provided with 

 two oblique parallel veins. Apex of the ovipositor furnished with 



lanceolate, acute, non-dentate valves Eneopteridce. 



cc. Claws of the posterior tibiae minute on the outer side, on the inner side 

 rather long, the upper one longest and the lower one shortest. 

 Metatarsi usually short, sparsely dentate basally. Ovipositor 

 variable, cylindrical, apical valves dentate, or flattened. 

 d. Posterior tibiae not at all serrulate, but armed on both edges with 

 two sizes of spines. Insects large, their body and legs robust. 

 Ovipositor heavy, its apical valves depressed and with its tip 



truncated StenogryllidcB, 



dd. Posterior tibiae both serrulate and spined. Insects variable in size, 

 the body generally rather slender, with the legs variable. Ovi- 

 positor graceful, the apical valves not flattened, acuminate, or 

 blunt, the margins dentate or crenulate Podoscirtida. 



Key for Separating the Families of the Suborder Gryllotalpoidea. 



A. Anterior tibiae greatly dilated and digitate. Antennae filiform, many-jointed. 

 Head without, or provided with but two, large ocelli. 

 b. Antennae setaceous, rather long. Elytra or tegmina membranous, in the 

 male provided with a tympanum or stridulating surface. Pronotum 

 elongate-oval. Tarsi three-jointed. Posterior legs small, saltatorial, 

 the tibiae somewhat dilated. Cerci long and seto-ceons,. .CurtilUda. 

 bb. Antennae very short. Body linear, cylindrical. Elytra or tegmina almost 

 absent. Posterior legs very short, non-saltatorial. Tarsi two-jointed. 

 Cerci not apparent. Ocelli absent and the eyes small, ocelliform. 



CylindrodidcB. 

 A A. Anterior tibi;c little dilated, three- to four-spincd at apex. Antennae short, 

 monililorm, composed of few joints. Posterior legs strongly saltatorial, 

 the femora dilated; tibiae slender, four-clawed at apex, tarsi single-jointed 

 or aborted. Elytra corneous, without a tympanum. Head furnished 

 with three ocelli Tridactylida. 



