CYCLOMMATUS CANALICULATUS. 237 



each elytron shows two indistinct costae, of which the 

 outermost runs along a raised streak ending in the apical 

 callus , and moreover a longitudinal impression commencing 

 behind and just within the shoulder and obliquely widening 

 out towards the suture. 



The sculpture of the under surface is very fine , with a 

 few large punctures on the glossy portions of the head. 

 The prosternal process is narrow and conically projecting. 

 The fore-tibiae are straight and unarmed. 



Length of a male of the forma media 36 mm., breadth 

 at the shoulders S^g m"^- — Agreeing with the forma maxima, 

 but the colours are brighter and the insect is more densely 

 covered with scales. 



The mandibles are shorter, having the length of the 

 distance between the front-margin of the head and the 

 intermediate coxae ; they are more regularly curved inwards 

 along their whole length , and the strong ante-basal tooth is 

 replaced , very near to the base , by a broad process which 

 is bicuspidate on the left , tricuspidate on the right mandible. 



The front-margin of the head between the outer margins 

 of the mandibles is broadly emarginate forming a regularly 

 curved line ; at this line the head sinks suddenly down 

 towards the clypeus which is declivous and similar in shape 

 to that of the forma maxima ; the middle lobe of the front- 

 margin , however , is not upturned. 



On the thorax the groove which accompanies the front - 

 margin is inconspicuous , and that along the middle less dis- 

 tinct, but at the base the raised margins are still observable. 



The longitudinal impressions on the elytra are less dis- 

 tinct, and the prosternal process not so strongly projecting. 

 The tibiae are likewise unarmed. 



Length of a female IS^/g mm., breadth at the shoulders 

 6'/2 mm. — The colour is dark red-brown, the upper side 

 of the femora, however, pale yellowish brown, the tarsi, 

 antennae , palpi and apical half of mandibles pitchy black. 

 The head has a round spot on the centre and another 

 behiod each eye blackish with a bronze hue; the central 



Notes from tlie Leyden Museum, Vol. XIll. 



