494 Mr. B. P. Uvarov—Records and 
gradually narrowed towards apex, which is rather nar- 
rowly rounded. Wings fully developed, rather narrow, 
with the base coloured. Fore and middle femora thickened. 
Hind femora with all the keels rounded, but distinct ; lower 
keel straight, upper convex; the lower knee-lobes with a 
rounded basal dilatation, with the rest of lower margin 
straight; their apical angles about 90°, rounded. Hind 
tibiz quadrangular in transverse section, widened towards 
apex, with apical spines on both sides. All legs with large 
pulvilli. Male anal segment deeply and acutely triangularly 
incised in its middle, with two protruding triangular lobes 
at the sides of this incision; supra-anal plate about twice as 
long as broad, lanceolate, with sides straight and apex 
widely rounded. Cerci compressed, not reaching the apex 
of anal plate, distinctly incurved- in apical third; seen in 
profile dilated basally, with sides beyond this dilatation 
parallel, rounded at the apex. Subgenital plate compressed 
laterally, with hind margin almost vertical ; it is as long as 
the supra-anal plate. 
Genotype: Pterorthacris subcallosa, sp. un. 
This new genus belongs to the section Orthacres of the 
subfamily Pyrgomorphine and is rather closely related to the 
wingless Orthacris, being at once recognised by the presence 
of wings and numerous other characters indicated in 
description. 
30. Pterorthacris subcallosa, sp. n. 
g. Antenne distinctly longer than head and pronotum 
together. Head with a few very low and indistinct callo- 
sities behind the eyes. Pronotum impresso-punctate, bearing 
on each side two irregular rows of low shining callosities 
along the disc ; the inner of these rows consists of three 
very feebly developed callous spots, placed at equal intervals 
from each other, the hindmost of them just before the typical 
sulcus; the outer row corresponds to the lateral carine ; it 
begins with two very feeble and small shining spots, the first 
of which is placed at the very fore margin; three other 
larger and more convex callosities form the rest of the row, 
the hind tubercle being placed before the typical sulcus ; 
lateral lobes with two small callous spots about the middle 
of prozona, the hinder one being placed higher than the 
front one, and with two larger callosities, placed one above 
and slightly behind the other, between the second and 
typical sulcus. 
General coloration yellowish green. Antenne dark brown, 
black towards apex; base pale beneath; basal joints with 
