282 HACHIRO YUASA 



The parapharynx in Tettix (fig. 160), somewhat similar to 

 that of Melanoplus, is well developed and linguiform. The 

 pharyngea is the short distinct sclerite located at each caudo- 

 lateral angle of the subgusta. Its main part is on the ventral 

 side of the lateral wall of the postpharynx. Fused to the end of 

 each pharynx is the long curved paralingual sclerite. The con- 

 nection between these is weaker and less distinct on the right 

 side than on the left. The ventral arm of the paralingua curves 

 ventrad and merges into the linguacuta. The strongly chitinized 

 crescentic sclerite fused to each paralingua is the lingula. The 

 greater part of it is on the ental surface and extends mesad. 

 The subgusta is longitudinally concave and is constricted be- 

 tween the paralinguae. The position of the well-defined sub- 

 triangular chitinized area cephalad of each liiigula suggests that 

 it is homologous with the long oblique part of the salivia of 

 Melanoplus. The larger chitinized sclerite on the ventrolateral 

 aspect of the hypopharynx is the salivia and is separated from 

 the triangular area on the dorsal side by an oblique suture. 

 An oblique thickening near its caudodorsal part has its ventral 

 end produced into a prominent blunt extension, probably homol- 

 ogous with that in Stenopelmatus. The mesal extension of the 

 salivia is heavily chitinized and nearly transverse. The oscula is 

 more or less flat cephalad of the salivos. The salivary duct 

 bifurcates immediately caudad of the salivos, the latter being 

 dorsad c f the caudal margin of the mentum. There is an asym- 

 metry in that the right mesal arm of the lingula is slightly 

 caudad of the left one and the adjacent large patch of spinulae is 

 much more extensive on the right side than on the left. 



The parapharynx in Anisolabis (fig. 138) has its own charac- 

 teristics, but in the main conforms to the orthopteran type. It is 

 well developed, broad, and trilobed at the distal end. A long 

 pharyngea lies each side of the subgusta. Its caudal half is 

 expanded and extends obliquely dorsad into the lateral wall. of 

 the postpharynx. Its cephalic half is narrow and strongly 

 chitinized. The oblique L-shaped sclerite fused to the cephalic 

 end of each pharyngea is the paralingua. The linguatendon is 

 fused to the ventral, wider, less chitinized arm of the paralingua 



