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Orthoptera in the British Museum. 143 
The coloration alone is quite enough to distinguish 
this species from all others, but it has some very good 
morphological characters, too, as is evident from the above 
description. 
British Museum specimens : Fort Johnston, Nyasaland 
(P. Rendall), 1 3 (type) (named by W. F. Kirby as Demo- 
docus cognatus Walk.); Chirmda Forest, Gaza Land, 28 1. 
1904 (G@. A. K. Marshall), 1 2 (cotype). 
Genus AMPHIPROSOPIA, N. g. : 
Fastigium of the vertex prominent before the eyes, with two oblong 
lateral impressions and two opaque spaces, divided by a carina, 
between the eyes (as in genus Cataloipus). Frontal ridge slightly 
convex, gradually widening downwards. Lateral ocelli placed 
close to the eyes, at some distance from lateral margin of fastigium 
of the vertex. Antennae filiform, in male a little longer than head 
and pronotum, in female scarcely reaching hind margin of pronotum. 
Pronotum with straight lateral carinae, divergent backwards; 
median carina more markedly interrupted by hind sulcus only; 
metazona twice as short as prozona; hind margin of pronotum very 
slightly rotundate. Prosternal tubercle cylindrical, obtuse, bent 
backwards. Mesosternal lobes in both sexes transverse; interspace 
twice as long as broad. Metasternal lobes in 3 contiguous, in 9 
narrowly separated. Elytra in 3 as long as the abdomen, in 9 
far shorter. Wings shorter than elytra, narrow. Hind femora 
narrow, elongate. Hind tibiae with 9 spines inwardly and 11 out- 
wardly. Hind tarsi elongate, with second joint twice as long as it 
is broad. Abdomen of the male with anal segment inflated ; 
supra-anal plate subquadrate, large; cerci compressed, very wide, 
with short teeth near the apex; subgenital plate short and broad, 
with two very long narrow lateral lobes. 
Type of the genus: Heteracris adjuncta Walker. 
Walker’s Heteracris adjuncta, redescribed later on by 
Karsch under the name Demodocus amphiprosopus, cer- 
tainly does not belong to the genus Choroedocus Bol., 
since it has the second joint of hind tarsi elongate and the 
lateral ocelli placed at some distance from the margins of 
the fastigium. Besides, the vertex has on it impressions 
quite like those in Cataloipus, which is not the case in 
Choroedocus. 
1. Amphiprosopia adjuncta (Walk.). 
1870. Heteracris adjuncta Walker, Cat. Derm. Salt. B.M., 
lv, pp. 656, 657, no. 5, 
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