Orthopteroid Insects of Philippine Islands 1 3 



Ocelli disposed in a triangle. Hind femora shorter 

 than the combined length of the tibiae and tarsi. 



Achetidae. 



//. Head deformed, face sloping, front tumid or swollen, 



the upper portion produced into a variously modified 



process Platyblemmidae, 



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

 of the apical portion spined. Tegmina either abbreviated 



or wanting Gryllomorphidae. 



cc. Posterior tibiae usually biseriately serrulate. Without spines on 

 their lateral margins, but sometimes having them present in 

 their middle towards the apex. 

 d. Scutellum of the face about square, projecting forward be- 

 tween the antennal pits, below them not prominent. Body 

 frequently apterous. Median vein of the elytra, when 

 present, simple, not divided or branched. 

 e. Body subspherical, apterous. Antennae heavy, subfiliform. 

 Hind femora enormous, dilated, oval. Eyes subobso- 

 lete, minute. Anterior tibiae without auditory apparatus. 

 Hind tibiae without serration and provided above near 

 their middle with several movable spines ; apex with 



only three or four claws Myrmecophillidae. 



ee. Body subelongate. Antennae slender, setaceous. Eyes 



distinct. Posterior femora more slender, clavate ; hind 



tibiae slender, provided at apex with six claws. 



/. Scutellum of the face tumid and prominent between the 



antennae. Body covered with scales. In the females 



apterous, in male with membranous elytra. Anterior 



tibiae sometimes provided with auditory apparatus. 



Hind tibiae serrulate, not spinose, provided with 



elongate claws Mogisoplistidae. 



//. Scutellum of the face plain. Body subpubescent, winged. 

 Anterior tibiae always provided with auditory foram- 

 ina. Hind tibiae serrulated or spined. 



Acanthoplistidae. 



dd. Scutellum of the face transverse. Body winged. Eh'tra 



with the median vein branched ; the male speculum divided 



by two veins Cachoplistidae. 



bb. Posterior tibiae slender, armed on tlie 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 Pentacentridae. 



207 



