1898.] of the Coleoptera of South Africa. 389 



Synopsis of Species. 



A 2 . First dorsal segment of the abdomen much larger than the 

 others. 



B 2 . Antennae slightly clavate, the penultimate joints (more espe- 

 cially the ninth) larger than the intermediate ones . . . . caviceps. 



B 1 . Antennse not clavate, the three penultimate joints (especially 

 the ninth) smaller than the intermediate ones. 



C 2 . Third joint of the antennas strongly transverse deplanata. 



C 1 . Third joint of the antennae at least as long or longer than 

 broad, triangular or globose, never transverse. 



D 2 . Longitudinal carina of the head not extending on the frontal 

 part, ending on the vertex. 



E 2 . Longitudinal sulcus of the prothorax generally wanting or 

 exceedingly faint and hardly conspicuous when it exists. 



F 2 . Antennae short and thick, ninth and tenth joints transverse. 



G 2 . Elytra hardly longer than broad ; head rather long, not at 

 all attenuate (male), little attenuate (female) ; longitudinal 

 sulcus of the prothorax very faint and sometimes wanting frontalis. 



G 1 . Elytra longer than broad ; head short, much attenuate in 

 front ; longitudinal sulcus of the prothorax always entirely 

 wanting calcarata. 



F 1 . Antennae much more slender, ninth and tenth joints globose, 

 not transverse, or hardly so. 



G 2 . Head large and thick, sides rounded, the sulci shallow, 



arcuate, the carina on the vertex obsolete and very short incerta. 



G 1 . Head smaller, sides oblique, sulci deep, large and oblique, 



the carina on the vertex long and strong variabilis 



E 1 . Longitudinal sulcus of the prothorax never absent, always 

 very conspicuous. 



F 2 . Prothorax strongly cordiform, as long or nearly as long as 

 broad, longitudinal sulcus not very deep but very con- 

 spicuous, transverse one angulate in the middle ; shoulders 

 generally attenuated in both sexes. 



G 2 . Antennae more slender, ninth joint globose, colour generally 



darker, piceous-brown . . armata. 



G\ Antennae much thicker, ninth joint transverse, colour fer- 

 ruginous ; sometimes the shoulders are quadrate in both 

 sexes nasuta. 



F 1 . Prothorax very little cordate, broader than long, longitudinal 

 sulcus complete and deep, transverse one straight; shoulders 

 very quadrate in both sexes cruciata. 



D 1 . Longitudinal carina of the head extending from the neck to 



the frontal part sulcatula. 



A 1 . First dorsal segment of the abdomen not larger than the 

 following ones. 



B 2 . Prothorax variable but never transversely dilated, and 



broader than the elytra. 

 C 2 . Head with two foveae and two sulci. 



D 2 . Antennae with the joints (at least the intermediate ones) 

 transverse. 



