Pliyloi)]ia(ja Malayana. 99 



Genus CoRYNODEs, Hope. 



Col. Man. iii, p. 162; Marshall, Journ. Lin. Soc. Zool. viii. 



p. 30 ; Gerst. Reise nach Mossamb. p. Z^o. 

 Platijcorynus, Baly {olim), Desc. New Gen. and Spec. Phyt. 



p. 2. 



Corpus oblongura aut elongatum, convexum, plus minusve 

 cylindricum, plerumque metallicum. Caput perpendiculare, 

 thorace profunda insertum ; fronte utrinque supra oculum 

 plus minusve profunde excavata ; mandibulis plerumque mu- 

 ticis, rarissime in $ cornu valido armatis ; mitenms robus- 

 tis, articulis quinque aut sex exterioribus compressis, plus 

 minusve dilatatis, clavam formantibus, rarissime in $ filifor- 

 mibus ; mento profunde angulato-inciso ; oculis prominulis, 

 intus leviter sinuatis. Thorax marginatus, transversim con- 

 vexus, aut subconicus. Elytra thorace latiora, parallela, 

 convexa, plerumque infra basin transversim excavata, seria- 

 tim aut confuse punctata, rarius in $ tuberculata.* Pedes 

 robusti, tibiis intermediis sa?pe in $ extus ad apicem emargi- 

 natis ; unguiculis appendiculatis aut bifidis. Prosternum 

 utrinque ab episterno sulco profundo separatum ; epislernis 

 anticis scapulariformibus. 



The present genus is well represented in the Malay Archi- 

 pelago, three-fourths of the Asiatic species being natives of that 

 part of the world. The antennae of all the males have a tendency 

 to elongate, the club at the same time being distinctly narrower 

 than in the females of the same species. In one, C. mon- 

 strosus, these organs are filiform, the five upper joints, although 

 slightly compressed, not being broader than those immediately 

 below them. In the female of monslrosus the antennae are much 

 shorter and distinctly subclavate ; the same sex in this species 

 (as well as in three or four others belonging to the same section 

 of the genus) present the remarkable peculiarity of having their 

 elytra covered with a number of irregular tubercles, whilst the 

 elytra in the males are simply punctured in the ordinary way. 



* The exception to this is a single oblong tubercle, more or less distinct, 

 which exists in nearly all the species ; it is situated just below the humeral 

 angle, immediately within the outer margin of the elytron. 



