236 CYCLOMMATUS CANALICULATUS. 



The mandibles are loug , as long as the distance between 

 the front-margin of the head and the posterior coxae , their 

 outer margin is straight at the basal third, thence slowly 

 curved inwards and downwards , their inner margin armed 

 at about one third of its length with a strong tooth which 

 is slightly directed forward ; between the ante-apical tooth , 

 which is obliquely truncate at the tip , and the apex of 

 the mandible three small teeth are present. On the apical 

 third of the mandibles the outer upper margin rises slowly , 

 but opposite the front-margin of the ante-apical tooth this 

 raised margin ends suddenly so as to form here a small 

 toothlike projection. The mandibles are densely and extre- 

 mely finely granulated , sub-opaque , with the exception , 

 however, of the apical portion which is glossy. 



The upper side of the head shows a large flattened de- 

 pression , which extends as far as the front margin of the 

 thorax; laterally the margin of this depression is slightly 

 raised and joins the sides of the head in front of the 

 eyes ; outside of this depression the head is roughly sculp- 

 tured , the sculpture of the depression itself is similar to 

 that of the mandibles but somewhat coarser. The front- 

 margin of the head between the outer margins of the man- 

 dibles is broadly bisinuate, and beneath it the head is deeply 

 excavated ; the clypeus is slightly declivous , its front-margin 

 bisinuate, the middle lobe slightly upturned. 



The sides of the prothorax have an angular tooth about 

 the middle ; the front-margin is accompanied by a groove 

 which is interrupted in the middle and widened out towards 

 the sides; along the middle a distinct groove is present'), 

 which at the base of the thorax becomes deeper in conse- 

 quence of the raising margins. The pronotum is very den- 

 sely sculptured, and the narrow interspaces are irregularly 

 flowing together. 



The elytra are rather densely covered with very distinct 

 punctures , very densely however along the base and sides ; 



1) A faint continuation of this groove is to be observed on the base of the head. 

 Notes from tlie Leyden JMuseuixi, Vol. Xlll. 



