PROSOPOCOELUS .IA.VAKENS1S. 125 



NOTE XVIII. 

 CONTRIBUTION TO THE LUCANOIÜ FAUNA OF JAVA 



BY 



J. R. H. NEERVOORT VAN DE POLL. 



Prosopocoelus j avanensis v. d. Poll. 



This species , of which a single male of the forma maxima 

 is before us , although very closely allied to P. cavifrons 

 Hope ^) from the Philippines and to P. patricius Schauf. 

 from Celebes, might be at once separated from both by 

 the front-margin of the head , being without the crestlike 

 elevation which in the above cited allied species is already 

 quite obvious in specimens of median development; more- 

 over the dentition of the mandibles is different. 



The mandibles oi j avanensis are longer than the head and 

 thorax taken together, flattened , very slightly incurved for 

 about the basal three fifth of their length , almost straight for 

 the following fifth , thence gently bent inwards in an oblique 

 direction ; armed with a very large blunt dentiform process 

 at the base, a large obtuse tooth somewhat higher up, a series 

 of five small blunt contiguous teeth along the straight 

 portion at four fifth of their length, and finally a rather 

 large tooth at some distance from the pointed tip, forming 

 with the latter a terminal fork. 



The mandibles of cavifrons Hope are rather straighter, 

 tbe ante-basal tooth is wanting, and they have instead of 

 the series of small teeth only a single very large pointed tooth. 



Of patricius Schauf. we have specimens of median de- 

 velopment only, but in the description the mandibles of 



1) It is to the forma media of P. cavifrons Hope that P. ebtiniiius Albers 

 must be referred. 



Notes from the Leyden ]Musevim , Vol. XVII. 



