32 Mr. C J. (Jalian on new 



'Elaphidion mutatam, sp. n. 



Elaphidion tomentosinn $ , Cbevr. 



Castaneum, pube grisea deDse obtectum, prothoracc dorso quinque 

 tuberculis — tuberculo medio cariniformi, tuberculis duobus posticis 

 obsoletis ; elytris basi dense punctatis, puiictis pone medium 

 evanescentibus, singulis elytris humero et plaga dorsali prope 

 medium subnudis, castaneis, apicibus singulis bispinosis ; antennis 

 articulis 3° et 4° uni-, o^-lO'" bispinosis. 



Hab. Cuba, Florida. 



Under the name Elaphidion iomentosum Chevrolat included 

 two very distinct species. The females which he has described 

 are the females of the present species, the male of which I 

 saw in the possession of Dr. Horn when he was last on 

 a visit to England. Two female specimens from St. Dom- 

 ingo, which are undoubtedly the females of E. tomentosum, 

 are in the British Museum collection. Except in the much 

 shorter antennaj these two present no diflferences of import- 

 ance from the male Like the male they have the pi'osternum 

 truncated and vertical behind. In E. mutafum the prosternum 

 is feebly arched and almost flattened behind, the species there- 

 fore belonging to the Hypermallus section of the genus. The 

 spines at the apices of the joints of the antennae do not stop 

 with the seventh joint, as Chevrolat's description seems to 

 imply, but, gradually becoming smaller, are met with up fo 

 the tenth joint. Dr. Horn's male specimen, which was from 

 Keys, Florida, differed from the females only in having 

 slightly longer and slenderer antenna^, and in having the apical 

 border of the last abdominal ventral segment pointed in the 

 middle and sinuate towards the sides. In the female this 

 segment is rather sharply rounded at the apex. 



E. (omentosum, Chevr., bears a very strong resemblance to 

 E. mucronatumj Say, but is to be distinguished by the much 

 less close punctuation of the elytra and of the sides of the 

 prothorax. 



HORMATHUS, gen. nov. 



This genus is formed for an interesting little species from 

 St. Domingo belonging to the Ibidion group. It has the 

 characters which Lacordaire has given for the geiuis Ci/cni- 

 dolon^ \\\t\i the following ditforences and additions: — Fifth 

 joint of the antenna^, in addition to the third and fourth, 

 strongly thickened, none of the joints carinated. Prothorax 

 very slightly constricted in front of the middle. Elytra with 



