ORTHOPTERA. 
319 
a little longer and larger, the entire segment being a little larger than 
the mesothorax. The cox® are stout and thick; those of the prothorax 
spined. , 
. Sternum. 
The sternites (PI. XXXI, XXXII) are peculiar in this genus and family. 
The prosternum is very short and broad; the coxae are situated rather 
far apart. The mesosternum is divided into two portions; the anterior 
(praesternite) is divided by a median sinus into two lateral swollen areas, 
while behind, at the base of each coxa, is a stout, triangular spine. 
In the metasternum the anterior sternal portion or praesternite merely 
forms a transverse, curvilinear ridge, from each side of which arises a 
stouter posterior spine than in the mesosternum. 
THE ABDOMEN. 
There are ten and perhaps eleven uromeres ; nine large square ter- 
gites and a tenth narrower one, the tenth segment bearing the small 
unjointed cercopoda. The supra-anal plate probably represents the 
eleventh tergite, but it is not separated very distinctly by suture from 
the tenth uromere. The pleurites are broad but membranous. There 
are eight pairs of abdominal stigmata, which are situated on the pleurum. 
Of the sternites, the first seven are small and narrow, surrounded by 
membrane; the eighth is large and square. The ovipositor is enormous. 
(The proportion of parts in Plianeroptera is seen in Plates XXXIV- 
XXXVIII.) 
Family GRYLLIDiE. 
THE HEAD. 
Gryllus neglectus. The head is rounded, full, vertical in position, 
smooth, with no areas, although the three ocelli are present. The clypeus 
is separated by suture from the epicranium ; it is divided into two parts,, 
the post-clypeus being short and very broad, and separated on the 
sides by a well-marked suture from the ante-clypeus, which is consid- 
erably shorter and not so wide as the labrum, the latter being one-halt 
as long as broad. The genal ridges are remote and posterior to the 
orbits. The gftlar region is unusually broad; the meutum is much 
shorter and smaller than the submentum. 
THE THORAX. 
Notum. 
Pronotum is broad and flat, square, nearly as long as broad, and bent 
over the sides, so that the pleurites. are very short; posteriorly it over- 
laps the mesouotum. 
Mesonotum is very simple in structure. It is very short, being one- 
third as long as the pronotum and also one-third as long as the meta- 
notum ; the scutum is very short, consisting of two lateral raised areas, 
nearly separated by the large, broad, swollen scutellum, the latter 
transversely lozenge-shaped, being rounded in front and a little more 
angular behind. 
