Orthopteroid Insects of Philippine Islands 3 



rapid movements. Ootheca chitinized, usualb^ carried 



by parent Order Dictyoptera or Blattaria. 



ce. Body elongate, generally narrow, even when depressed or 

 expanded but little broader than deep at the posterior 

 extremity of the prothorax. Head free, often separated 

 from the prothorax bj' a deep constriction ; ocelli three 

 or wanting. Pronotum never transverse, except occa- 

 sionally by laminate expansions. Legs rarely depressed, 

 the front pair constructed for grasping. Insects of 

 deliberate movements. Ootheca membranous, not car- 

 ried by parent, but attached to twigs, bark or other 



objects Order Mantaria. 



dd. Eggs not contained in a capsule or ootheca. Insects social. 

 Frequently constructing large and complicated nests. Spe- 

 cies represented by males, females, workers and warriors. 



Order Isoptera. 

 bb. Cerci not segmented or jointed. Bod}^ generall}^ elongate, narrow. 

 Head subhorizontal, generally quadrate or gibbous ; mouth 

 antero-inferior ; ocelli often wanting; antennae usually longer 

 than the body and coarse. Pronotum very short. Legs all con- 

 structed for walking. Eggs dropped singly and indiscriminately. 



Order Gressoria. 

 A A. Tarsi normally four- or three-jointed, very rarely two-jointed. 

 Stridulating organs and auditory apparatus often present. 

 b. Posterior legs constructed for jumping, much more robust and 

 longer than the others. Organs of flight in a reversed position 

 when immature. Head vertical. Ovipositor, with a few excep- 

 tions, free or exserted Order Saltatoria. 



c. Antennae generally much shorter than the body, filiform, clubbed 

 or ensiform, the joints distinct, often depressed. Ocelli two 

 or three. Tarsi three-jointed. 

 d. Anterior legs constructed for walking or clinging to vegeta- 

 tation, not fitted for burrowing. Tarsi similar in structure 

 on all the legs. Stridulating organs located on the hind 

 femora and costal field of the front wings. Auditory ap- 

 paratus situated on the sides of the basal abdominal seg- 

 ment. Ovipositor composed of four homy plates vertically 



divergent at tip Suborder Locustoidea. 



dd. Anterior legs greatly modified for burrowing in the earth. 

 Tarsi of the front pair of legs dififering from those of the 

 other pairs. Stridulating organs located on the tegmina 

 or front wings. Auditory apparatus, when present, con- 

 fined to the anterior tibiae. Ovipositor not exserted. Body 



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