1S98.] of the Goleoptera of South Africa. 391 



trochanters with a basal tooth, posterior ones with a small 

 carina ; last ventral segment with a large but not deep 

 transverse depression algoensis. 



I'. Head smaller, not attenuate in front, sides parallel ; prothorax 

 similar to that of preceding species ; male ; intermediate 

 trochanters simple and mutic, posterior ones with a small, 

 cariniform hook ; last ventral segment with a smaller, 

 superficial, transverse depression microcephala. 



H 1 . Black ; antennae longer and slender, joints third to seventh 



only slightly transverse, eighth to tenth quadrate . . . . obscura. 



G'. Head as broad as long, large ; antennae little compact, ninth 



joint quadrate, tenth very little transverse nodosa. 



J>\ Antennae elongate, joints quadrate or even longer than broad longnla. 



€ r . Head with four foveae and without sulci myrmecopJiila. 



B-\ Prothorax very transverse, dilated on the sides, and wider 



than the elytra dilatata. 



Eaffbayia frontalis, n. sp., 

 Plate XVIII., fig. 3. 



Oblong, little convex, chestnut or testaceous, antennae and legs 

 'testaceous, moderately pubescent, the head is variable in both 

 sexes, but the sulcus is always rounded, and the vertex has a short 

 carina ; antennae short and thick, first joint long, somewhat 

 obconical, second globose, third transversely triangular, fourth to 

 seventh much transverse, the fifth is the largest, the eighth — and 

 especially the ninth — much smaller, transverse, tenth larger, less 

 transverse, eleventh shortly ovate, abruptly conical at apex ; pro- 

 thorax cordate, a little broader than the head, sides well rounded 

 and hardly sinuate posteriorly, longitudinal sulcus always extremely 

 slender and sometimes wanting, the transverse one not very strong 

 and a little angular, with the median groove small and the lateral 

 ones a little oblong ; elytra sparsely sub-rugose, short, little 

 attenuate at the base, with the shoulders rounded, dorsal sulcus 

 strong, reaching at least the median part ; first dorsal segment 

 very large, deeply impressed at base ; metasternum convex in both 

 sexes. 



Male : Head nearly as long as broad, very little attenuate in 

 front ; frontal part large, rounded, convex, densely punctulate and 

 squamose ; eyes larger ; there are no other sexual marks, even in 

 the abdomen. 



Female : Head a little shorter and more attenuate in front ; 

 frontal part truncate, not convex and smooth ; antennae somewhat 

 thicker ; elytra broader than long. Length 1*20 mm. 



27 



