THE TETTIGIDiE OF CEYLON. 
99 
with the aforesaid characters, are used in distinguishing the 
groups. 
The infra-scapular area sometimes referred to in the descriptions 
lies just below the shoulders on each side of the pronotum 
immediately above the elytra (when the latter are present) and 
usually is bounded posteriorly by the small curved humero-apical 
carina, but sometimes it is prolonged distad. Just above this 
infra-scapular area at the outer side of the shoulders, on the 
dorsum, is sometimes a narrow linear or triangular area separated 
by the prolongation forward of the latero-apical carina. This was 
termed the scapular area by Morse (1900, p. 4). In some species 
the infra-scapular area is represented by a widened prolonged area 
lying below the lateral carina forming a broad margin. This 
often appears in the Cladonotinse. In some extreme cases the 
scapular and infra-scapular areas may even be very narrow, being 
then about the same width opposite the outer half of the elytra as 
instanced in Scelimena, the shoulder then appearing bicarinate. 
The posterior ocelli are variously situated with relation to the 
eyes. Those genera in which species are represented with their 
position nearly on a plane with the middle of the eyes are, 
namely, Cladonotus , Deltonotus , Loxilobus , Criotettix , Aptero- 
tettix , Tettix , Euparatettix, Hedotettix , Goptolettix , Acanthalobus , 
and Paratettix. In Mazarredia and Lamellitettix they are 
situated on a plane with about the lower third of the eyes ; while 
in Scelimena , Cavialidium , and Systolederus , they are almost on 
a plane with the lower margin of the eyes. 
Some Minor Changes in Classification. 
In the study of the various species of the genus Criotettix , it was 
found that some of the characters which had already been noted 
by Bolivar (1887, p. 223) in his table were of sufficient difference 
to separate the species possessing them into new genera. For 
example the group of which C. tricarinatus, Bol.,forms the type does 
not conform to the group of which the very distinct C. miliarius , 
Bol., is a representative. A.t the same time there are distinctions 
to be found dividing the above two representative groups from the 
new species Loxilobus acutus , which forms the third generic type. 
The three genera thus formed may be summarized as follows :—- 
First Division .—In the tricarinatus group (plate III., figs* 
.15-15&) the head and eyes are lightly elevated, or exserted, the 
vertex being distinctly narrower than one of the eyes, or subequal, 
the spine of the lateral lobe of pronotum being distinct, and 
transverse or bent obliquely forward. This characterizes the 
genus Criotettix , Bol. 
