192 catantopin-.t:. 



19 (22) Lateral carina of head sliglith- 



sinuous or nearly straight 

 from the base of mandibles 

 to ocelli. 



20 (21) Posterior tibioe -with the outer 



ridge that bears the spines 

 somewhat flattened and ex- 

 panded towards the apex ; 

 with seven spines besides the 

 apical one ; frontal carina 

 narrowed at vertex Oxya, Serv., p. 198. 



21 (20) Posterior tibi;e with outer ridge 



not expanded ; with eight 



spines besides the apical one. Caryaxda, Stal, p. 201. 



22 (19) Lateral carin;e of head suddenly 



bent at an angle at the base 

 of the antennpe; frontal carina 

 parallel-sided IIieroglyphus, Krauss,* 



23 (IS) Prosternal tubercle truncate at [p. 201. 



apex ; external apical spine 

 of posterior tibiae very small 

 and difficidt to detect Eacilia, Stal, p. 205. 



24 (3) Tegmina imperfectly developed, 



elongate ovate, punctured ; 

 without wings ; antenufe 

 rather short, with transverse 

 joints Cercina, Stal,t p. 20G, 



25 (2) Tegmina and wings absent ; in- 



sect elongate, subcylindrical ; 



head short and wide Tarbaleus, Brunn., p. 200. 



2G (1) Posterior tibiae without external 

 spine at the apex. 



27 (34) Fastigium separated by a dis- 



tinct angle or ridge from the 

 frontal carina. 



28 (31) Wings fully developed. 



29 (30) Fastigium a little longer than 



broad ; antennae narrowly 

 ensiform ; tegmina somewhat 

 acute at apex ; posterior 

 femora reaching apex of 

 abdomen Gelastorrhinus, Brunn. 



30 (29) " Piostrum in front of the eyes [p. 216. 



longer than the pronotum ; 

 antennae broadly ensiform 

 towards the base, tapering 

 whip-lilce towards the tips " 

 (Kirby) Lefroyia, gen. n., p. 219. 



31 (28) Wings absent. 



* H. bettoni and H. bilincatv.s sometimes have the tegmina and wings more 

 or less short. 



t The genus Cadetria appears from description to differ from Cercina in 

 having the hind margin of the pronotum angular, and the radial vein of the 

 tegmina costiform. 



