ON THE GENUS JONTHOCERUS. 193 



or black-brown. Allied to J. crematus Lac. but smaller, 

 the autenuae clothed with whitish hairs, the eyes smaller 

 and less approximate at the base of the head, front broader, 

 elytra more emarginate at the apes and more distinctly 

 striate at the sides. Length 4^/^ mill. cT. 



Hah. Sumatra. 



This species is imported in Europe with dry tobacco 

 (Grouvelle). 



13. J. zanzibaricus , n. sp. 



(ƒ. Shining black, legs, tip of the elytra, in one of the 

 specimens also the sides, brownish. Head not angulate 

 behind the eyes, channeled above, front very narrow, eyes 

 large, rounded, very approximate at the base of the head, 

 metarostrum slightly channeled in the middle and at the 

 sides, attenuate anteriorly, prorostrura shorter, scarcely 

 broader at the tip. Antennae nearly as long as the entire 

 body, with the joints 3 — 11 cylindrical, clothed with whitish 

 hairs , shorter than those of the eastern species. 



Prothorax strongly constricted anteriorly, channeled above, 

 the sides regularly curved. 



Elytra elongate, with the shoulders a little raised, the 

 sides almost parallel, the apex emarginate, the external 

 angles sub-acuminate ; deeply tristriate along the sutural 

 interstice, this latter broad, deplanate, the following nar- 

 row in the median portion but more distinct than that of 

 some eastern species ; elytra at the sides also distinctly 

 striate , the striae not so deep as the sutural ones. 



Legs regular, hind metatarsus longer than the following 

 two joints taken together. 



Body beneath brown, shining, head and metarostrum 

 almost keeled in the middle, the remaining portion of the 

 rostrum excavate; metasternum and base of the abdomen 

 channeled. Length S^/g mill. 



Hab. Zanzibar, 



Two males, captured by Mr. Haffray, in the Genoa Museum. 



J. zanzibaricus m., the second species of this genus 



Notes from the Leyden UMuseum , "Vol. XX. 



13* 



