Orthoptera from the River Ogove. 259 



Subfamily Phasmin-jh. 

 Bathychaeax, gen. nov. 



Female. — Apterous, rather stout, granulated ; antennse 

 rather shorter than the front femora, 2i-^-jointecl, with most of 

 the joints long and cylindrical ; scape Hattenecl, about twice 

 as long as broad, second joint also longer than broad and 

 considerably longer than the following joints ; front legs 

 much longer and front femora much thicker than in the last 

 two pairs of legs. 



Readily distinguished from Phasma (^Bacillus auct.) by the 

 granulated body and the cylindrical joints of the antennte. 



Bathycharax gramdatus^ sp. n. (PI. XII. fig. 9.) 



Uniform brown, except that the face is varied above with 

 black and below with yellow. Head with a row of 4 raised 

 tubercles behind ; pronotuni with 3 imperfectly formed 

 grooves and a transverse one dividing it nearly equally ; 

 there is also a distinct carina on each side ; mesonotlim 

 thickly granulated and with 3 central carinje, the lateral ones 

 not extending to its extremity, but the central one continued 

 along tiie metanotum and abdomen ; abdomen with segments 

 2-8 (counting the median segment as 1) gradually dimin- 

 ishing in length ; ninth short and transverse ; tenth three 

 times as long as broad, gradually tapering, and extending 

 for half its length beyond the operculum ; cerci very short, 

 rather broad and rounded, just projecting on each side at the 

 base of the tenth segment. Under surface of the body cari- 

 nated throughout on the central line behind the propectus, 

 which is carniated on the sides ; most of the hinder part of 

 the body is carinated on the sides both above and below the 

 middle. Legs carinated and sulcated ; first joint of front tarsi 

 about as long as all the remaining joints together; first joint 

 of four hinder legs about as long as the terminal joint, tlie 

 second and third being each about twice as long as the fourth, 

 which is the shortest. 



Dimensions. 



millim. 



Long, corporis 100 



,, anteunarum 18 



„ capitis 6 



„ pronoti ... 6 



,, mesonoti 22 



„ uietauoti, cum segmento medio .. 17 



„ segment! raedii 4 



