Oi'thopteroid Insects of Philippine Islands 19 



//. Prosternum not narrowed. 



g. Metasternum rounded posteriorly Psalinae, 



gg. Metasternum truncate posteriorly. 



h. Antennae with from twenty-five to thirty-five 

 segments ; elytra always, wings usually, well 



developed Labidurinae. 



hh. Antennae with from ten to fifteen segments; 

 apterous. 

 i. Last dorsal segment truncate. .Parisolabinae. 



ii. Last dorsal segment bifid Brachylabinae. 



dd. Body very strongly flattened ; forceps strongly flattened and 



sickle-shaped Platylabiinae. 



bb. Squamopygidium always developed ; ninth vein of wings four- 

 shaped ; body very much flattened ; forceps sickle-shaped. 



P ARADERM APTERA. 



Elytra weak at axillary angle, exposing ample scutellum. 



Apachyidae. 

 AA. Metapygidium and telson degenerate ; pygidium well developed, often 



with complex processes; male genitalia single Eudermaptera. 



b. Second tarsal joint simple, not lobed nor dilated Labiidae. 



d. Elytra keeled or carinated. 



c. Tarsi long and very slender ; elytra granulose, the keel formed 



by a row of minute tubercles Pericominae. 



ee. Tarsi short and relatively robust ; elytra smooth, with sharp 

 keels. 

 /. Antennae with cylindrical segments. 



g. Abdomen of male parallel sided ; elytra perfect ; an- 

 tennae with from sixteen to twenty segments 



[African group] Vandicinae. 



gg. Abdomen of male more or less dilated ; antennae with 

 from twelve to fifteen segments ; elytra abbreviated 



[South American group] Strongylopsalinae, 



//. Antennae with segments subconical or clavate [Oriental 



and Australian group] Nesogastrinae. 



dd. Elytra not keeled or carinated. 

 c. Body not very strongly flattened. 



/. Head transverse, the sutures very distinct; eyes promi- 

 nent, longer than, or as long as, the first joint of the 



antennae Spongiphorinae, 



//. Head narrow, the sutures subobsolete ; eyes smaller, 

 scarcely as long as the first antennal segment. 



Labiinae. 



cc. Body strongly flattened Sparattinae. 



bb. Second tarsal segment lobed or dilated. 



21 



