241 
with rugose edges, and double mid-rib, 4 mm. long. 
Subgenital lamina much exceeding the next two segments in 
length (24 mm.), apex broad, subemarginate. Cerci very 
short, scarcely exceeding anal segment. Under side of abdo- 
men with a double row of tubercles to sixth segment, 6 to 8 
on each segment. 
Length of body, 172 mm. 
Length of head, 10 mm. : width, 7 mm. 
Length of pronotum, 8 mm. ; width, 6*5 mm. 
Length of mesonotum, 38 mm, ; width, 6*5 mm. 
Lengcu of metanotum, 15 mm. : width, 8 mm. 
Length of abdomen, 103 mm. ; width, 9 mm. 
Length of tegmina, 22 mm. : width, 6 mm. 
Length of wings, 47 mm. : width, 47 mm. 
Length of ant, femora, 34 mm. 
Length of ant. tibiae, 33 mm. 
Length of ant. tarsi, 11 mm. 
Length of med. femora, 27 mm. 
Length of med. tibiae, 30 mm. 
Length of med. tarsi, 8 mm. 
Length of post, femora, 46 mm. 
Length of post, tibiae, 42 mm. 
Length of post, tarsi, 10 mm. 
Length of antennae, 35 mm. 
The described female is the only specimen in the S.A. 
Museum collection which possesses both the conspicuous 
cephalic and the dorsal abdominal appendages denoted, nor 
have I come across figures or aescriptions indicating these m 
the form mentioned — besides other distinctions. There are, 
however, one or two other Central Australian species repre- 
sented, which exhibit similar form and wing structure of tiie 
females. There is also in tiie collection a male with promi- 
nent cephalic horns, which may belong to tne same species as 
the described female, although the horns differ in form, being 
very divergent and compressed laterally. There are also seve- 
ral other males with small tubercular spines on the head, but 
these appear to belong to the Hornless females referred to 
above. The colour pattern of their ample wings is quite dif- 
ferent from that of the described form, but the detailed 
descriptions, etc., have to be postponed for the present. 
Acrophylla nubilosa, sper. nor. 
Male. Pale brown : body very slender. Head glabrous : 
flat, with indistinct', whitish dots and lines above. Occiput 
with two median depressions, and curved impressed 
furrows on each side. Ocelli obsolete. Antennae 
densely hirsute. Pronotum much shorter and narrower thcta 
