1897.] of the Colcoptera of South Africa. 63 



Synopsis of Species. 



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

 others. 



B 2. Antennse slightly clavate, the penultimate joint (more 



especially the ninth) larger than the intermediate ones . . cavicepa. 



B 1. Antennae without chib, the two penultimate joints (espe- 

 cially the ninth) smaller than the intermediate ones. 



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



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

 broad, triangular or globose, never transverse. 



D 2. Prothorax entirely without longitudinal sulcus. 



E 2. Head big and thick, rounded, the sulci shallow, arcuate, the 



carinate on the vertex obsolete and very short inccvta. 



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

 the carinula of the vertex long and strong. 



F 2. Antennae more slender, ninth joint globose, tenth scarcely 



transverse, both much smaller than the intermediate ones variabilis. 



F 1. Antennffi much shorter and thicker, ninth joints slightly 

 and tenth strongly transverse, very little larger than the 

 intermediate ones calcarata 



D 1. Prothorax with a longitudinal sulcus more or less complete, 

 but ne^'er totally wanting even in the least developed 

 specimens. 



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

 broad, longitudinal sulcus more or less obsolete, transverse 

 or angulate in the middle ; shoulders generally attenuated 

 in both sexes. 



F 2. Antennte more slender, ninth joint globose, colour generally 



darker, piceous brown armata. 



F 1. Antennae much thicker, ninth joint transverse, colour 

 ferruginous, sometimes the shoulders are quadrate in 

 both sexes nasufa. 



E 1. Prothorax very little cordate, broader than long, longi- 

 tudinal sulcus complete and well marked, transverse one 

 straight, shoulders very quadrate in both sexes cniciata. 



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

 following ones. 



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

 transverse. 



C 2. Prothorax with a longitudinal sulcus more or less obsolete, 

 and sometimes reduced to an oblong fovea in the anterior 

 part of the base. 



D 2. Prothorax transversely ovate, not cordiform laticoUis. 



D 1. Prothorax cordiform, at least as long as broad. 



E 2. Longitudinal sulcus deep and well defined rngosida. 



E 1. Longitudinal sulcus more or less interrupted or obsolete. 



F 2. Broad; antennae with intermediate joints slightly transverse, 

 ninth and tenth nearly quadrate ; prothorax ampliated on 

 the sides ; elytra slightly longer than wide, ferruginous or 

 testaceous major ina. 



F 1. More slender ; antenna with the intermediate joints and 

 also the ninth and tenth very transverse ; prothorax 

 longer, not ampliated on the sides ; elytra longer than 

 broad ; colour generally dark with the feet rufous . . . . hicolor. 



