636 Transactions South African Philosophical Society, [vol. xiii. 



Athyreus damara, Kolb., 

 Annal. Soc. Ent. Belg., li., 1907, p. 31. 



" Ferruginous brown, clothed with fulvous hairs, shiny ; head 

 plentifully granulate, labrum obtusely rounded in front, mandibles 

 produced forward like a dorsal lamina, ridge of the epistoma trans- 

 verse, high, bidentate, deeply sinuate before the teeth (of the man- 

 dibles), frontal part minutely callose in the middle, the anteocular 

 genae sending forth an acute reflex process ; prothorax constricted 

 laterally, everywhere closely granulate on the upper side, anterior 

 margin bisinuate, the median lobe emitting a tooth, broadly excavate 

 longitudinally in the median dorsal part, the outer margins of the 

 excavation sinuose carinate, the carina tridentate on each side, 

 interrupted behind beyond the second tooth, the bottom of the 

 excavation very narrowly canaliculate longitudinally, the canalicula- 

 tion edged on each side by a thin carinule ; elytra slightly substriate, 

 the stria? partly irregularly punctate, vanishing behind, the 1st 

 (sutural), 5, 9, 13, 16 slightly convex, anterior tibae 5-dentate 

 outwardly, the intermediate pair entire, the hind ones transversely 

 unicarinate. 



Length 18-21 mm. 



Hab. Damaraland (Lake Ngami)." 



Gen. BOLBOCEEAS, Kirb., Catal. i., p. 477 



Key to the Sjiecies. 



As. Anterior tibiae, 5-dentate. 



a-. Prothorax deeply excavate in front. 



$ : Clypeus with an anterior transverse ridge with each 

 angle raised in a somewhat long, truncate tooth ; anterior 

 part of the prothoracic excavation surmounted by two very 

 long, closely set conical tubercles, another long tubercule in 

 the posterior part capicola. 



<j : Clypeus with a frontal truncate tubercle ; prothorax with 

 three long teeth, two anterior, one median ; dorsal part with 

 a double excavation on each side between the three horns . . iphicles. 



a'. Prothorax retuse and very deeply impressed in front. 



Clypeus with a high median, transverse, short ridge ; exca- 

 vation of prothorax with two small tubercles and a lateral 

 one on each side ; punctures on the sides of the prothorax 

 round, closely set /outturn. 



Clypeus with a median transverse tri-dentate ridge; anterior 

 impression of prothorax somewhat shallow, upper edge 

 smooth sinuate in the centre and limited by a very small 

 tubercle on each side ; punctures on the sides of the 

 prothorax reticulate scabrose hebes. 



