492 Transactions South African Philosophical Society. y\OL. xin., 



a'. Antennae 9-jointed. 



Prothorax hexagonal Macromima. 



Prothorax not hexagonal Cymophorus. 



A . Mesosternum with a blunt process between the inter- 

 mediate coxse. 



a. Frontal part depressed, carinate longitudinally, clypeus 

 reflexed. 



Anterior margin of clypeus highly raised in the centre ; 

 anterior and posterior tibiae strongly bi-spinose on upper 

 side ; last abdominal spiracle acute SpilopJiorus. 



Anterior margin slightly raised in the centre ; anterior 

 and posterior tibise uni-spinose on upper side ; last ab- 

 dominal spiracle plane Hoplostomus. 



A 2 . Intermediate coxee separated by a narrow mesosternal 

 process. 



B 2 . Men turn not obturating completely the buccal cavity, 

 leaving the labial palps exposed to view. 



D3. Tarsal joints moderately slender, elongated ; 

 5-jointed 



or. Last spiracle of abdomen not prominent. 

 b*. Clypeus very convex at the base. 



c 2 . Posterior part of prothorax rounded 

 laterally. 



Mentum not gibbose in the outer face . . Ccenochilus. 



Menturn gibbose in the outer face . . . . Anatochilus. 



a'. Last spiracle of abdomen spinose or tuber- 

 culate. 



c\ Posterior part of the prothorax straight or 



only slightly sinuate Plagiochiliis. 



D 2 . Tarsal joints compressed, transverse, or nodose. 



Prothorax quadrate ; elytra striate, covered 



with oblong scales Proxcnus. 



Prothorax hexagonal, humeral part of elytra 



wry sloping Astoxenus. 



b". Clypeus not convex. 



Clypeus not derlexed, head simple; pro- 

 thorax bexagonal ; eacb elytron with a con- 

 spicuous costa ; anterior tarsal joints not 

 nodose Pilinitrgus. 



Clypeus deflexed, bead highly carinate : 

 prothorax Bub-hexagonal ; elytra bi-costate, 

 anterior tarsal joints strongly nodose,. .. IAssogemu8 r 



