190 ON THE GENUS JONTHOCERUS. 



occiput furrowed , with the margin of the furrow raised ; 

 prothorax chanueled; elytra indistinctly striate at the sides, 

 the apex angularly cut with the external angles obtusely 

 acuminate ; hind metatarsus nearly as long as the two 

 following joints taken together. Length 4^/4 mill. cT- 

 Hah. Mentawei and Andaman Islands. 



5. J. angulaticeps Senna. 



Notes Leyden Museum, Vol. XX, 1898, p. 53. 



Distinctive characters : cf. Black , head , rostrum , an- 

 tennae, prothorax, shoulders of the elytra and legs ferru- 

 ginous red; head angulate behind the eyes, channeled in 

 the middle, eyes moderate, more separated on the front 

 than in J. Modiglianii Senna ; prothorax channeled ; elytra 

 distinctly striate also at the sides , the apex emarginate , 

 the external angles margined and rounded ; metasternum 

 and base of the abdomen shallowly impressed. 



Q. Eyes smaller, frontal region broader, antennae shorter 

 and more robust, with the joints oblong-ovate; tip of the 

 elytra margined and rounded. Length 5 — 6^/3 mill. 



Hah. Western Java. 



The var. borneensis Senna , from Borneo , has the eyes 

 a little larger and more approximate on the front and at 

 the base of the head ; the elytra are ferruginous red near 

 the base. 



6. J. mimus Senna. 



Ann. Mus. Civ. Stor. Nat. Geneva, ser. 2a, Vol. XIX (XXXIX), 

 p. 229, 1898. 



Distinctive characters: Ferruginous red; head distinctly 

 angulate behind the eyes, singly impressed above, eyes 

 moderate, less approximate at the base of the head than in 

 the preceding species , front moderately narrow ; prothorax 

 channeled , broader anteriorly than in J. angulaticeps Senna; 

 elytra distinctly striate also at the sides , the apex emar- 



Notes from tlie Leyden Museum, Vol. XX. 



