HORN EXPEDITION—ORTIIOPTERA. 
375 
latter acutely acuminate, black ; frontal costa not sulcate, straight. Pronotum 
dull, tricarinate, fore margin straight, much raised, disk slightly tuftiform, hind 
margin obtusely triangular. Elytra slightly longer than the abdomen, narrow, 
with a large ill-defined black spot near base. Hind legs missing. Abdomen 
slender, whitish ; supra-anal lamina elliptic. Cerci conical, terete, apex obtuse. 
Subgenital lamina small, cordiform, suberect. One male only. 
Length of body - - - - - 17'5 mm. 
M plyp'fi.13-5 „ 
„ pronotum - - - - 4 „ 
Width „ - - - - - 2-7 „ 
Locality. —Alice Springs. 
The form of the antennm is a remarkable feature. 
Section VI.—LOCUSTODEA. 
Decticid.e. 
ChlOPObalius, gen. nov. (green and spotted). Hind tibiie with two 
apical spines below. Pronotum not carinate {inedial line depressed)., selheform, hind 
margin subtruncate, slightly convex. Subgenital lamina flat; styles rather long, 
flat, very obliquely truncate; apex of ovipositor smooth. Front flat, base broader 
tha7i the truncated apex, moderately declined. Elytra and wings perfectly expli¬ 
cate, very long. Pectus narrow. Meso- and metasternum bispinose. Hind tarsi 
with free plantula, much shorter than first joint (difFert Metaballus, affinis Rachi- 
dorus). Vertex acuminate, acute ; very much narrower than first joint of antennte 
(aff. Metaballus, diflf. Rachidorus). Anal segment short, broadly, but ?iot deeply 
emarginate. Ovipositor slightly and gradually cui’ved. Styles with a short 
recurved tooth. 
ChlOPObalius leucovipidis, sp. n. Green, elytra banded and spotted 
with white. Fastigium of vertex very narrow, about one-third of the width of the 
first joint of the antennse, acuminate fi’om the middle, apical part spine-like, widely 
separated from the apex of frontal costa, which is acutely triangular, including the 
shallow ocellar spot, remainder very indistinctly discernible, flat; vertex with a 
pale medial and several lateral lines; eyes globose, very prominent; antennae with 
basal joint very large, subcompressed, second joint half as long and thick, third 
much longer and thinner, remainder very slender, subequal. Pronotum terete, 
hind part flat, fore margin raised, disk wrinkled. Elytra very long, narrowest in 
