ECTATORHINUS HASSELT!. 231 



NOTE XXXVI. 



ON A NEW SPECIES OF THE GENUS ECTATORHINUS, 

 ECTATORHINUS HASSELTI. 



BY 



W. ROELOFS. 



Since the establishment of the genus Ectatorhinus by 

 Lacordaire ^) for a beautiful species of Rhyucliophorous 

 beetles discovered in the island of Borneo by the cele- 

 brated naturalist R. Wallace , two other species have been 

 described by Mr. F. Pascoe ^) viz: E. Adomsi of Japan 

 and E. femoratus of Sarawak (Borneo). 



The entomological collections brought home by the 

 Dutch Scientific Expedition to central Sumatra, contain 

 a unique female specimen of a new species of which I 

 possess also a single specimen of the other sex , captured 

 at Malacca by the Comte de Castelneau. 



E. Wallacei Lac. which I do not possess , but which I 

 have examined in Mr. Pascoe's collection , is especially dis- 

 tinguished from its congeners by the greater lengtli of its 

 rostrum which reaches at least to three fourths of the length 

 of the body. 



E. femoratus Fasc. is provided with a large lateral tu- 

 bercle on the elytra behind the shoulders ; in the other 

 species this tubercle is not present. 



1) Lacordaire, Geiiera des Coléoptères. Suites a Buffou. torn. VII (ISGG), 

 p. 53. (note 1: diagnosis of Ectatorhinus Wallacei Lac.). 



2) Journal of tJiu Limiean Society. Zoology, vol. XI, p. 478; pi. X, fig. 10. 



Notes from tlxe Leyden Museum, "Vol. U. 



