Descriptions of New or Little-known Orthoptera. 437 



There is also a distinction which will help in the cases of females, 

 namely the shape of the ovipositor, which is of two types : 



A. Ovipositor very short, both upper and lower valves recurved 

 at apex ; upper valve not vertically truncate and slightly longer than 

 the recurved lower valve : durandi, patruelis. 



B. Ovipositor well developed; upper valve vertically truncate, 

 sharply hooked at apex, and shorter than the sharply acuminate, 

 horizontal lower valve : petersi, matabelensis, transvaalensis, binduramis. 



Key to the South African Species. 



GROUP OF matabelensis. FEMALE. 



The two spines of the lateral anterior process of the pronotum 



long and greatly diverging. 

 Anterior tibiae with 5 spines, intermediate 5, posterior 5-17 ; 



upper spine distant ...... petersi. 



Anterior tibiae with 5 spines, intermediate 5, posterior 4-17 ; 



upper spine distant . ... . . . binduranus. 



The two spines of the lateral process of the pronotum moderately 



long and not very diverging. 



Anterior tibiae with 5 spines, intermediate 4-3, posterior 5-12 . matabelensis. 

 Anterior tibiae with 4 spines, intermediate 3-3, posterior 4-18 . transvaalensis. 



GROUP OF durandi. FEMALE. 



Anterior tibiae with 4 spines, intermediate 4, posterior 13-17 . patruelis. 



Anterior tibiae with 5 spines, intermediate 5, posterior 5-17-20 . durandi. 



ENYALIOPSIS PETERSI, Schaum. 

 Peters' Reis. Moss, v, 1862, p. 119, pi. 7, fig. 7. 



I connect with this species six examples, of which four are full 

 grown, two $ $ and two $ ? ; and 2 $ $ juv. or of minor develop- 

 ment. In all of them the median spine of the hind border is well 

 developed, but the two lateral ones are always much longer. This 

 character is very clearly shown in the excellent figure given by Schaum. 

 Some of the examples show a rudiment of tegmina under the pro- 

 notum. In this and the following species the lateral fore process 

 of the pronotum is more sharply bi-spinose, the two spines greatly 

 divaricating. 



The formula of spines on tibiae is : fore, 5-5 ; intermediate, 5-5 ; 

 posterior, 5-17. One of my examples has a 6th spine on the outer 

 side of the hind femur between the apical 4th and 5th. 



Length of body (adult) 4143 mm. ; of pronotum 17|-18 mm. ; of 

 hind femur 18^-19 mm. ; of hind tibiae 22-23 mm. 



