ON THE GENUS JONTHOCERUS. 189 



tion which is undoubtedly based on a female specimen. This 

 species is unknown to me and 1 have also some doubts 

 as to its belonging to this genus. 



2. J. mentaweicus Senna. 



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

 p. 228, 1898. 



Distinctive characters : Ferruginous red ; head rounded 

 behind the eyes , these moderate and scarcely approximate 

 on the front; prothorax shorter than the head and rostrum 

 together , smooth , very obsoletely impressed near the base ; 

 elytra slightly striate at the sides , the apex angularly cut 

 in the middle, the external angles rounded. Length 5 mill, cf . 



Hab. Mentawei Islands (West of Sumatra). 



3. J. carinensis Senna. 



Ann. Soc. Ent. Belgique, Vol. XXXVIII, p. 362, 1894. 



Distinctive characters: cf. Opaque black, elytra at the 

 tip fulvous; head angulate behind the eyes, furrowed above, 

 eyes large, very approximate on the front; prothorax chan- 

 neled; elytra striate also at the sides, the apex emarginate 

 in the middle, the external angles obtusely acuminate; hind 

 metatarsus longer than the two following joints together. 



9- More robust, brown black, shining, elytra at the tip 

 fulvous; head and front broader, eyes smaller, antennae 

 shorter and more robust , with the joints oblong-ovate ; 

 prothorax broader, with the furrow deeper; tip of the elytra 

 margined and rounded ; tarsi shorter. Length 6 — 9 mill. 



Hab. Upper Burma. 



4. J. Modiglianii Senna. 



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

 p. 228, 1898. 



Distinctive characters : Ferruginous red ; head angulate 

 behind the eyes , these large , nearly touching in front , 



Notes from the Leyden ]VIuseuin , "Vol. XX. 



