Orthopteroid Insects of Philippine Islands i 5 



Families of Tettigonoidea (Locustodea) 



A. Tarsi of all three pairs of legs normally four-jointed. (In the Amer- 

 ican genus Daihina of the family Rhaphidophoridae the middle and 

 in some species of a related genus the front tarsi are only three- 

 jointed). 

 b. Tarsi more or less depressed. 



c. Anterior tibiae provided with auditory appratus or foramina. 

 d. Antennae inserted between the eyes, less remote from the 

 top of the occiput than from the clypeal suture. 

 e. First and second tarsal joints smooth, not sulcate laterally. 

 (Hind tibiae with an apical spine above on each side.) 



Phaneropteridae. 

 cc. First and second tarsal joints longitudinally sulcate lat- 

 erally. 

 /. Foramina or auditory apparatus typically wide open. 

 g. Posterior tibiae without apical spines above. (Phas- 



mid-like in appearance.) Phasmodidae. 



or Prochilidae. 

 gg. Posterior tibiae provided with an apical spine on 

 both sides above. 



h. Prosternum unarmed Meconimidae. 



hh. Prosternum armed with a pair of spines or 

 tubercles. 

 i. Pronotum hood-like, posteriorly strongly and 

 acuminately produced ; lateral carinse of the 

 pronotum cremulate or dentate. 



Phyllophoridae. 

 it. Pronotum not hood-like nor posteriorly much 



produced Mecopodidae, 



//. Foramina or auditory apparatus either linear or shell- 

 like in its opening. 

 g. Anterior tibiae without terminal spines above, 



h. Antennal scrobes or pits with the margins pro- 

 duced Pseudophyllidae. 



hh. Antennal scrobes with their margins hardly pro- 

 duced. 

 i. Posterior tibiae without apical spines above. 



Sagidae. 

 ii. Posterior tibiae provided with an apical spine 

 above on one or both sides. 

 y. Posterior tibiae with an apical spine only 

 on the outer side above. 



Tympanophoridae. 

 jj. Posterior tibiae with an apical spine on 



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