8 Descriptive Catalogue [1897. 



known to occur in South Africa. The discovery of no less than 15 

 new species from 1885 to date leads me to believe that this number 

 will be much increased ultimately. 



Synopsis of Genera. 



Labial and maxillary palpi free, not hiding the buccal 

 cavity. 



Antennae ten-jointed, joints not fused. 



Ligula ovate, large ; maxillae with a distinct outer lobe ; 

 all tarsi with the four basal joints papillose underneath in 

 both sexes Cerapterus. 



Ligula very small, triangular ; maxillae without outer lobe Arthroptems. 



AntenuEe ten-jointed, all joints but the basal one fused ; 

 maxillae bilobate Pleuropterus. 



Antennae six-jointed, all joints but the basal one fused ; 

 maxillae without outer lobe Pentaplatartlirus. 



Labial and maxillary palpi hiding the buccal cavity. 



Antennae two-jointed. 



Head with a neck, no groove in front for the reception of 

 the antennal club Paussns. 



Head without neck, a groove in front for the recej)tion of 

 the antennae Hylotorus. 



Gen. CEEAPTEEUS, Sweder., 

 Vetensk. Ac. HandL, ix., 1788, p. 203. 



Orthopterus, Westw. 



Euthysoma, Jas. Thorns. 



Head short, subelongato-quadrate, dilated behind the eyes, which 

 are very large and prominent, narrowed into a very distinct neck ; 

 mandibles moderately long, falciform ; mentum with the latei-al 

 lobes not much developed ; ligula large, ovate, spatuliform, convex, 

 finely grooved longitudinally in the centre, upper edge set with 

 bristles ; basal joint of labial palpi annuliform, second subconical, 

 short, third much inflated, bell-shaped, truncate and hollow at tip ; 

 maxillary palpi four- jointed, apical joint as long as the two preceding 

 ones together and subacuminate ; maxillae with an elongato-ovate 

 membranaceous lobe, short, hooked at tip and pectixiate along the 

 inner edge ; antennae ten-jointed, basal joint subquadrangular, the 

 others compressed, set transversely, joined in the centre only, and 

 nearly four times as broad as long ; prothorax transverse, slightly 

 rounded laterally and nearly twice as broad as long ; elytra elongato- 

 quadrate, slightly tuberculate laterally at the apex ; legs short, 

 massive, much compressed ; apical part of tibiae hollowed so as to 

 partly receive the tarsi ; tarsi dilated, the two basal joints fused, all 



