ORTHOPTERA. 
315 
not so far down as usual in the other Orthopterous families, though in 
Tettix it does extend down much farther than in Caloptenus. The 
clypeus is well marked, one-third as long as broad. The genae are not 
very broad ; the gula is short and broad. 
THE THORAX. 
Notum. 
The pronotum (PI. XXVIII) is very large, extending to the hinder 
edge of the mesonotum, and down on the sides as far as the insertion of 
the legs. 
The mesonotum. (PI. XXX.) This and the metanotum, except in the 
absence of the prsescutum, closely resemble the same parts in the Per- 
lidse. The scutum is short and broad, excavated in front, one-lialf as 
long in the middle as on the sides, each side swollen in the middle area, 
the hind edge deeply excavated to receive the scutellum, which is 
shorter than wide, obtuse, rounded in front, and behind is a little more 
pointed. The postscutellum is represented by a narrow, transverse ridge 
expanding on the sides. 
The metanotum (PI. XXX) is as the mesonotum, but a little longer, as 
the hind wings are larger than the fore pair. The scutellum, with the 
sutures separating it in front from the scutum, is more distinct ; the scu- 
tum is a little longer on the median line; the scutellum is rather more 
acute, triangular in front, and longer and larger than the mesoseutel- 
lum. The postscutellum is represented by a simple ridge as in the 
mesothorax. 
Pleurum. 
The propleurum. (PI. XXIX.) The episternum is rudimentary, 
minute, shorter than broad, and triangular. The epimerum is almost 
obsolete, being represented by a short, ridge-like sclerite. The tro- 
chantine is rudimentary, minute, with a large spine. The coxa is a little 
larger and more swollen sclerite than the trochautine, and is lull be- 
hind . 152 
The mesopleurum. (PI. XXXI.) The episternum is entire, very large 
and full, narrowing towards the insertion of the wings, and extending 
below to beneath' the insertion of tlnnegs. The epimerum is of even 
width, being quite regularly oblong, and only extending to the insertion 
of the legs above. The meta-spiracle is situated on the posterior, lower 
angle of the epimerum, while the meso-spiracle is placed on the anterior 
and upper edge of the episternum. The trochautine and coxa are much 
as in the fore legs. 
The metaplcurum. (PI. XXXI). Much as in the mesopleurum, but 
more oblique, and on the whole slightly larger, as the hind wings are 
larger. The episternum is narrower below, and much more definitely 
'“In Fig. 13, p. 250 of tlio 1st Report of the Commission, those parts are wrongly named; the tie. 
©hantine is tb© anterior and the coxa is the posterior piece. 
