234 CYCLOMMATUS ÜASTEURI. 



rather regularly convex , their inner margin armed , a little 

 before the base , with a small tooth , and midway between 

 this and the large post-median tooth two very small teeth 

 are present, which are accompanied by some inconspicuous 

 undulations of the margin ; the ante-apical tooth is strong 

 and obliquely truncate at the tip , and between it and the 

 apex of the mandible are four small teeth. Moreover the 

 mandibles are provided on the outer margin of their under 

 surface, a little before the base, with a very distinct tooth. 

 The mandibles are extremely densely and finely granulated 

 and thereby opaque , with the exception , however , of the 

 tips of the teeth and the apical portion which are glossy. 



The upper side of the head shows a large semilunar 

 flattened depression which does not quite extend to the 

 front-margin of the thorax ; laterally this depression is 

 bordered by a sharply raised margin , which is continued 

 to the sides in front of the eyes; outside of this margin 

 the sculpture of the head is very rough in consequence of 

 irregularly arranged ridges, the interspaces of which show 

 some punctures. In front of the semilunar depression , the 

 front-margin of which is bisinuate , the head slopes slowly 

 and ends in the middle in a processus which widens out 

 at the tip and has the front-margin broadly emarginate 

 in the middle. 



The sides of the prothorax are angular about the middle ; 

 the front-margin is accompanied by a very regularly con- 

 tinued narrow groove , and a shallow impression runs along 

 the middle. The sculpture of the prouotum is similar to 

 that of the mandibles and of the depressed and declivous 

 portion of the head , but coarser , especially at the sides , 

 and along the middle the granulations are replaced by 

 some large punctures. 



The elytra are subshining in consequence of an extremely 

 fine sculpture which is somewhat coarser at the extreme 

 base and is wanting along the suture where a few small 

 but distinct punctures occur. Two faint longitudinal costae 

 are present on each elytron. 



Notes from tlie Leyden Museum, Vol. XIII. 



