PROSOPOCOELUS TARSALIS. 191 



NOTE XXXI. 



PROSOPOCOELUS TARSALIS, A NEW LUCANID 



DESCRIBED BY 



C. RITSEMA Cz. 



Mr. W. Albarda has presented to the Leyden Museum 

 a male specimen (forma major) of an interesting Prosopo- 

 coé/ws-species from central Java, captured by Mr. Roldanus 

 at Magelang (Kadoe Residency), which no doubt is still 

 undescribed. It seems to be allied to Prosopocoelus cilipes 

 Thorns., from Assam, a species which is unknown to me, 

 but which is said to be likewise distinguished by its slender 

 and elongate tarsi and by the crenulate lateral margins of 

 its prothorax. 



Length without mandibles 23 mm., that of the mandi- 

 bles 8 mm. ; breadth at the shoulders 8 mm. — Above 

 dark chestnut-brown, brighter on the elytra and legs, the 

 tarsi and body underneath blackish. 



The head opaque, large, longer than the prothorax but 

 narrower, flattened and slightly sloping towards the front 

 margin , deeply emarginate between the outer margins of 

 the mandibles , the bottom of the emargination faintly bisi- 

 nuate ; between the eyes and the front angles of the pro- 

 thorax the head is slightly swollen; the ocular canthus, 

 of which the outer margin is straight and has a slightly 

 oblique direction , reaches the middle of the eye ; the sui*- 

 face of the head is covered with an extremely fine and 

 dense punctuation intermixed with large punctures on the 

 depressed portion and on the sides (even on the canthus). 



The mandibles are slightly and regularly curved inwards ; 

 their dentition is irregular : a blunt ante-basal tooth which 

 in the right mandible is placed closer to the base than in 

 the left one, and between this tooth and the forked apex 

 five irregularly arranged blunt teeth are present. The 

 mandibles are glossy, with the exception, however, of the 

 basal portion which is opaque ; they are covered with an ex- 

 Notes from the Leyfleii Museum, Vol. XIV. 



