212 Transactions. — Zoology. 



In the female the spines on the presternum are further apart 

 than in the male, and the head and thoracic nota are smoother. 

 It is generally rather larger than the male, and the legs are 

 proportionally shorter. 



Locality. — New Zealand only. 



Key to the Species. 



Mid femora without spines below ; post-margins of ab- 

 dominal terga smootti : 

 Fourth to eighth abdominal terga not emarginate. . D. heteracantha. 

 Fourth to eighth abdominal terga emarginate pos- 

 teriorly . . . . . . . . . . D. parva. 



Mid femora with spines below ; post-margins of abdo- 

 minal terga granulated . . . . . . .. D. rugosa. 



Deinacrida heteracantha. Plate XII., figs. 1-lc. 



Deinacrida heteracantha, White, in Gray's Zool. Misc., 1842, 

 part 2, p. 71; Dieffenbach's New Zealand, ii., p. 280; 

 Zool. Voyage of "Erebus" and "Terror," Insects, p. 24, pi. 5, 

 figs. 1, la, and Ih ; Hochstetter's New Zealand, p. 169, 

 wood-cut; Buller, Trans. N.Z. Inst., vol. iii., p. 35, and 

 Zoologist, 1867, p. 849 ; Brunner, Mon. Stenopelmatides, 

 p. 25. Hemicleina gigantea, Colenso, Trans. N.Z. Inst.. 

 vol. xiv., p. 278 (1882). 



Antennae five or six times the length of the body. 

 Front slightly wrinkled ; post-clypeus very short ; labrum 

 nearly circular ; mandibles not conspicuously keeled. Pro- 

 notum margined, symmetrically rugose, the lateral furrows 

 smooth, the transverse furrow obsolete. Meso- and meta-nota 

 slightly margined, transversely wrinkled on the posterior por- 

 tion. Thoracic sterna smooth and shining, the lobes of the 

 mesosternum produced into sharp spines, those of the meta- 

 sternum into blunt spines. Abdominal segments slightly 

 transversely striated above near their posterior margins, and, 

 in the male, they are obscurely keeled from the fifth to the 

 eighth. Fore and middle femora unarmed below. Hind 

 femora, below, with four to seven strong spines on the outer 

 and seven to twelve on the inner edge. Fore and middle 

 tibiae with four pairs of spines below ; the middle tibige have 

 also two spines above on the posterior side. Hind tibiae, above, 

 have four alternating spines in each row, the inner larger 

 (occasionally a fifth is developed) ; below they have four spines 

 in the inner and five in the outer row. 



The sounding-organ is a single oblique ridge on each lobe 

 of the second abdominal tergum. 



In the female the abdominal segments are more strongly 

 keeled above than in the male. The keel is most prominent 

 on the fifth and sixth segments ; the second and third seg- 

 ments are slightly emarginate, posteriorly, above. 



