HuTTON. — On Neio Zealand Acrididae. 45 



Genus Sigaus. 



This genus resembles the iVfrican Apoboleiis in that the 

 frontal costa dies away a little below the eyes, as well as in 

 the rounded prosternal tubercle. Prom Tritropis, of Aus- 

 tralia, it differs in having only lobiform tegmina, as in Mesam- 

 hria, ixom. which it differs in the frontal costa not being 

 produced nor sinuated. 



Sigaus piliferus. 



Subgenital plate of the female elongated, the apex with a 

 truncated point and a shoulder on each side. 



Genus Trigoniza. 



Subgenital plate of the female with a long acute point, 

 springing from the lower surface a little behind the apex, 

 which is hidden between the bases of the lower pair of the 

 ovipositor. 



Trigoniza directa. Plate II., figs. 8a-8c. 



Apex of the subgenital plate in the female with two sharp 

 teeth. Subgenital plate in the male broader than the abdo- 

 men, much recurved, rounded at the apex. The supra-anal 

 plate triangular, apex acute, cerci long, projecting far in front 

 of the apex. Furcula of the tenth segment well developed. 



Trigoniza campestris. Plate II., fig. 9. 



Subgenital plate of the female with the apex truncated, 

 rugulose, but without any well-marked teeth. 



I have received a specimen from Mount Cook Hermitage 

 (collector, H. Suter). 



Trigoniza rugosa. Plate II., fig. 10. 



Subgenital plate of the female with the apex rounded and 

 smooth. 



Genus Phaulacridium. 



Probably I was wrong in giving Praxilla, of Stal, as a 

 synonym of this genus, as Praxilla is said to have the distal 

 spine on the outer mai'gin of the hind tibiae developed, and 

 therefore to belong to another group. If this is the case, 

 Praxilla does not occur in New Zealand. 



Phaulacridium marginale. Plate II., figs. 2a-2c. 



Subgenital plate of the female acuminate, the apex ending 

 in a sharp tooth with a smaller cusp on each side ; supra- 

 anal plate triangular. In the male the subgenital plate is not 

 broader than the abdomen, and is recurved, the recurved por- 

 tion with a concave sinuation, the apex rounded ; supra-anal 

 plate acuminate ; cerci short, not projecting beyond the apex 



