270 HACHIRO YUASA 



higher level and overlaps this portion of the mentum. The 

 stipulae are distinct, quadrate, and bear a palpiger on each lateral 

 aspect. The suture between each stipula and palpiger is dis- 

 tinct for a short distance on the ventral aspect and obsolete 

 on the dorsal. The stipulae, except the fundarima, are mem- 

 branous on the dorsal aspect. The fundarima (fr) is chitinized 

 and distinct for some distance on the ventral aspect. The small, 

 elongated, triangular appendage which is obliquely attached to 

 the mesocephalic margin of each stipula is a glossa. Its distal 

 end is covered with fine setae. The cephalic lobe, laterad of 

 and separated by a distinct latarima (Ir) from each glossa, is a 

 paraglossa. The suture between the stipula and paraglossa is 

 distinct. On the dorsal aspect the glossa and paraglossa are 

 fused to the cephalic margin of the stipula without the indication 

 of a suture. The proximal part of the mesal margin of each 

 paraglossa is concave and the mesodistal portion is dilated and 

 covered with minute setae. The lateroproximal portions of the 

 glossae fit into the concavities of the paraglossae. The labial 

 palpi are three-segmented and geniculate. The distal portion of 

 the third segment is hemispherical and covered with minute 

 setae. According to the interpretation of Crampton ('17), the 

 labium articulates with the maxillariae. If so, this articula- 

 tion is only slightly or not at all differentiated. The caudal 

 angles of the submentum ordinarily are continuous with the 

 microcoria. 



The submentum in Mantis (figs. 121 and 129) is elongated, and 

 narrowed toward the cephalic margin. In Diapheromera (figs. 

 127 and 134) it is considerably elongated and is deeply emargin- 

 ate on the caudal margin. The condition in Gryllus (figs. 122 

 and 130) is similar to that in Blatta. It is wider than long in 

 Orchelimum (figs. 125 and 133) and Stenopelmatus (figs. 123 

 and 131) and its caudal margin in the former is roundly emargin- 

 ate. In Melanoplus (figs. 124 and 135) and Tettix (figs. 126 

 and 132) it is crescentic, and its caudal margin is deeply emar- 

 ginate. The submentum of Anisolabis (figs. 136 and 137) is 

 large, strongly chitinized, and subquadrate, with the cephalic 

 and caudal margins only slightly emarginate. There is a nar- 



