266 HACHIRO YUASA 



the dorsal aspect with the maxacoria (wc). The palpifer {pf) is 

 the small sclerite on the dorsal aspect, near the cephalolateral 

 part of the stipes and is separated from it by a subchitinized 

 area. The galea (gl) is two-segmented. It is attached to the 

 laterodistal margin of the stipes without any indication of a 

 suture. The proxagalea (pg) is short, subcylindrical, and its 

 distal margin on the dorsal aspect is marked by a transverse 

 chitinous band and on the ventral by a distinct fold. The 

 distagalea (dg) is much longer and slightly narrower than the 

 proxagalea. It is hood-shaped and overlaps the distal portion 

 of the lacinia. The distom^sal margin is flaring and spinulate. 

 The lacinia (la) is the flattened, chitinous, distal appendage 

 mesad of the galea which fits into the mesal concavity of the 

 latter. The lacinia is separated from the stipes by the distinct 

 suture already mentioned, but its caudolateral portion is ex- 

 panded into a subquadrate area which encroaches upon the 

 stipes, and the suture is obliterated for a short distance. The 

 suture is obsolete on the dorsal aspect. The maxadentes (ms) 

 are sharp, curved, strongly chitinized, and two in number. The 

 hamadens (h) is located near the maxadentes and is minutely 

 tridentate. The mesal margin of the lacinia is convex, sharply 

 flattened, and bears prominent lacinarastra (rs). The maxil- 

 lary palpus (mp) is five-segmented and the mesocephalic margin 

 of the distal segment is membranous and covered with setae 

 and spinules. 



The cardo is two-segmented in all species studied. The sub- 

 cardo is irregular in outline, its entoparartis is always promi- 

 nent and bears the premaxatendon, and its exparartis is often 

 bifurcate and combines the function of a condyle and an ace- 

 tabulum. The alacardo is convex, triangular or semitriangular, 

 and obliquely attached to the subcardo. The ental surface of 

 the suture between the two segments bears a parademe. The 

 alacardo articulates with the stipes at its laterodistal angle, and 

 the subcardo with the caudomesal angle of the stipes on the 

 ventral aspect. In Mantis (figs. 96 and 104) and Ahisolabis 

 (figs. 93, 94, and 95), the alacardo is triangular, smaller than 

 the subcardo. In Mantis, Diapheromera (figs. 110, 115, and 



