280 HACHIRO YUASA 



The subgusta is slightly concave and is continuous with the 

 broad ventral wall of the postpharynx. The cephalic ends of 

 the paralinguae constrict the subgusta. There is a narrow, dis- 

 tinctly setiferous, moderately chitinized area cephalad of each 

 lingula corresponding to that in Blatta. The salivia is large and 

 chitinized. A nearly vertical arm extends dorsad from it into 

 the setiferous area above. This may correspond to the similar 

 arm in Gryllus. The cephalic part of each salivia is longitu- 

 dinally convex and forms a shelf along the lateroventral margin 

 of the hypopharynx. The ventral aspect of the hypopharynx is 

 membranous and longitudinally furrowed on the meson. The 

 caudolateral angles are strengthened by the chitinized part of 

 the saliviae. The oscula is narrow and the salivos is dorsad 

 and slightly cephalad of the middle of the mentum. 



The parapharynx in Stenopelmatus (fig. 159) is large, quad- 

 rate, and linguiform. The pharyngea is a long slender sclerite 

 along each side of the subgusta. Its expanded caudal part sup- 

 ports the lateroventral margin of the postpharynx. The cephalic 

 half is uniformly narrow and extends cephaloventrad. The dis- 

 tinct brownish sclerite located on each lateral aspect, cephalad 

 of the pharyngea, is the paralingua. A membranous linguacuta 

 is attached to the caudoventral angle of each paralingua. It 

 extends laterad toward the rectotendon of the mandible. The 

 lingula is the large triangular sclerite cephalad of each para- 

 lingua; its dorsocephalic angle is produced into a curved ental 

 arm which approaches the arm on the other side. The caudal 

 part of the^ subgusta is wide and flat, and the cephalic part 

 converges narrowly. The salivia is located along the ventro- 

 lateral margin of the hypopharynx. Its caudal part, ventrad 

 of each lingula, is a distinct bar which extends nearly hori- 

 zontally to the ventro-caudolateral angle of the hypopharynx 

 and then bends mesocaudad to the wide hooded salivos. The 

 distal part of the salivia is longitudinally convex so as to form a 

 shallow shelf on each ventrolateral margin of the hypopharynx. 

 The dorsal aspect of the hypopharynx is distinctly bent near its 

 middle. The oscula cephalad of the salivos is very much nar- 

 rowed by the chitinized area caudad of the mesarima of the 



