145 
Habitat.—Leigh’s-Creek (Poole), The Peake, Central Australia 
(Driffield), (Coll. S.A. Mus.). 
The species resembles Brunner’s G. nigrogeniculata (male, 
Manilla) in general aspect, but the elytra are twice as long, the 
fastigium much wider, the spines of the hind femora much less 
in number, &c., hence I have considered the creation of a new 
species justifiable. 
GRYLLACRIS MARMORICEPS, spec. nov. 
Size moderate to large. Head oblong from front view, vertex 
much raised above pronotum. Face pale, with fine impressed 
dots; apex of labrum (male) or clypeus (female) brown, mar- 
ginal ridges of cheeks dark brown, also the mandibles. Fastig- 
ium of vertex twice as wide (male) or wider (female) than first 
antennal joint, much depressed and flattened, marbled paler and 
darker testaceous and traversed by black sinuous lines. Lower 
ocelliform spot conspicuous, small, oval, acuminate above, pale- 
yellow ; upper pair subtrigonal, dull, all bordered blackish, this 
colour extending to apex of fastigium, and continues in three 
sinuous black lines to posterior margin of occiput, two being 
lateral and one central, the former joined obliquely at two-thirds 
of their course (from front) to the middle one by emitting on 
either side a fine but often interrupted line, the central line being 
continued from the junction to the hindmargin ; a depressed, 
pale, pyriform spot at the base of either of the antennz borders 
and defines the frontal fastigium. Disk of pronotum straight, 
flattened, with a short black medial streak in front and a depressed 
line behind; fore margin convex, hindmargin nearly straight; de- 
flexed lobes longer than high, nearly quadrangular, angles rounded, 
callosities promiscuous. Elytra more than one and a half 
times the length of body, veins slightly darker than body-colour. 
Wings rather longer than elytra, very pellucid, veins and veinlets 
not bordered darkly. Hind femora (male) with three or four 
external, and two internal spinelets (female with three). Hind 
tibizee above with three or four very minute spinelets on either 
margin. Abdomen with ninth segment cucullate, external 
margin densely but minutely syined, centrally with two very much 
longer spines, remote from each other and the lateral ones. 
Ovipositor nearly straight, gradually tapering, apex dark, rugose, 
acuminate. 
Male Female 
Length of body... .. 845 mm. 37 mm. 
Length of pronotum ... 65 “ TE OWA 
Length of elytra DO . 50 pa 
Length of hind femora... 17 “ Iso © 
Length of ovipositer .... — 5 39 
