HORN EXPEDITION—OUTHOPTERA. 
373 
blackish ; cheeks without ridges, but with a short furrow from the mouth toward 
the eyes; latter oval, black, with some white streeks or ramifying white lines. 
Pronotum terete, short, thick, conical, with four transverse sulci ; fore margin 
straight, smooth ; lobes broad, inferior margin slightly obli(iue, subsinuate ; hind 
margin slightly and obliyue concave, of disk not produced, truncate; lower margin 
of lobes broadly whitish, this band extending in a straight line to the inferior 
extremity of the eyes. Elytra lobiform, base narrow, apex broadly rotundate ( ? ) 
or oblique ( ^ ), veins crowded, thick, pale spaces between, small, black. AVings 
rudimentary, pale pinkish. Meso- and metanotum black and pink, or wholly 
blackish or brown (but always with the raised yellow spots). Abdomen long, 
terete or subcompressed, very gradually attenuated to apex. Legs spotted. Hind 
femora rather slender ; ridges thick, edges rounded ; inner side pale. Hind tibipe 
terete, slender, straight, with 8-12 internal, and 5-8 external spines (c?), or 12 
internal and 8 external spines ( ?) ; apical external spine always present. Supra- 
anal lamina of male triangular. Cerci acutely conical ; subgenital lamina 
cucullate, much incurved (ventro-apically), with a rounded tubercle in the middle 
which forms the apex of the body. Female with supra-anal lamina oval, valves of 
ovipositor very stout, superior pair with lateral ridges obtusely dentate, pale, apex 
black ; subgenital lamina bilobie. 
S 
Length of body 
- 22 
—24 mm. 
55 
elytra 
- 3 
— 5-5 „ 
5) 
pronotum 
- 5- 
5— 6 „ 
Width 
55 
- 4 
- 5-5 „ 
Length of hind femora 
- 13 
-14 „ 
Width 
5 5 5 5 
- 2 
— 2-5 „ 
$ 
35—40 mm. 
5— 7 
8—11 
8 — 9 
14—18 
3— 4 
51 
5) 
5) 
5 ? 
Locality .—Pale var., Storm Creek (c??). Crown Point (<?), Oodnadatta (?). 
Dark var., Darwent Creek (J ?), Oodnadatta (one (?, four ?), Deering Creek ( $). 
The pale and dark varieties differ also in some other details, but scarcely 
sufficient to separate them. A remarkable habit is that usually a male and a 
female only are found together and feeding in company without quitting each 
other’s company. AVhen alarmed the small male bestrides the much stronger 
partner, and is carried by her out of harm’s reach; the movements are, however, 
slow and comparatively feeble. The genus and species is widely distributed in 
South Australia, but nowhere numerously, and may have to be removed to another 
section. 
