Orthoptera in the British Museum. 139 
In his description of H. elegans Walker records this 
species as an Indian one, and so does Kirby in Fauna of 
British India, but the only specimen in Museum collection 
(type) is without locality label on it. Since this type of 
C. elegans agrees in all details with the types of cognata, 
I believe that the elegans type is also from Africa and that 
this name is a mere synonym of C. cognata, which is a 
true Catalovpus. 
Walker’s and Kirby’s quoted descriptions being based 
practically on colour characters only, I think it useful to 
give some of the more important morphological characters 
of this species. 
In its habitus C. cognatus is near to C. oberthiivi Bol., 
but the elytra are shorter and in the females scarcely 
reach the apex of the abdomen, while in the males the 
elytra reach the apex of the abdomen, but fail by a good 
deal to reach the hind knees. The most striking feature 
of C. cognatus, which distinguishes it from all other known 
species, is the form of the prosternal tubercle which in the 
male is strongly narrowed towards the acute. apex, bent 
backwards, with fore side gibbose and hind slightly concave ; 
in females the apex of the tubercle is not acute, but the 
tubercle is still narrowed towards the apex. Mesosternal 
lobes with interspace in females quadrate, in males a little 
longer than wide. Cerci of males have their widest point 
shortly before apex, being here one and a half times as large 
as at their base, while in C. oberthiiri the cerci are only 
slightly widened before the apex and at their widest point 
but little broader than at their base. As regards coloration, 
the difference between C. cognatus and C. oberthiiri is to 
be seen on the hind femora only, which have in C. ober- 
thiivt two (rarely confluent) rather wide black spots along 
the upper margin of area externomedia, while in C. cognatus 
only a narrow grey (very rarely black) stripe is present at 
this point. Three males from Fort Johnston differ in 
their coloration from all other specimens, being unicolorous 
brownish-yellow with obsolete spots on elytra. 
The average dimensions of C. cognatus are as follows :— 
3 2 
Length of body . 33-35 mm. 46-50 mm. 
7 >» pronotum . 95,5-6 7, 5-8 
Fs »» Clytra ’. . 24-25 31-35 
5 >, hind femora ., 22-23 28-32 
