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ODONTOCHEILA.— CTENOSTOMA. 



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9. Odontocheila chiriquina. 



O. nlcaraguensi quam maxime affinis, differt tantum labri marginibus et dentibus rufis, thorace graciliore multo 

 subtilius granulato haud striguloso, elytris dorso magis infuscatis femoribusque posticis omnino chalybeo- 

 nigris. Elongata, fusco-cuprea, capite rubro-cupreo et aurato, vitta angusta marginali ab oculo usque ad 

 elytrorum apices aurato-viridi extus violacea ; thorace anguste cylindrico, dorso opaco crebre vermiculato- 

 striguloso subgranulato ; elytris gutta alba marginali ; corpore subtus pedibusque chalybeis nitidis, femoribus 

 quatuor anticis versus basin rufo-piceis. 



Long. 7-7J lin. 



6 ?• 



Hab. Panama, Volcan de Chiriqui {Champion). 



This and 0. nicaraguensis belong to the cayennensis type of Odontocheila, which is 

 quite remarkable for its tendency to develop well-defined local races in comparatively 

 small geographical areas throughout the northern region of South America, 

 ten such races, subspecies, or species have already been described. 



Eight or 





IEESIA. 



Iresia, Dejean, Sp. Gen. Col. v. p. 206. 



Fourteen species of this genus have been described, ranging from South Brazil to 

 Mexico, though apparently rare everywhere. The genus is allied to Therates of the 

 Malayan region in the Old World, with which it has in common the bisulcate forehead 

 and large vaulted labrum. The species are found on the trunks of forest trees, around 

 which they run nimbly in search of prey. 



1. Iresia boucardi. 



Iresia boucardii, Chevrolat, Rev. et Mag. Zool. 1856, p. 351 ; Lacordaire, Gen. Col. Atlas, t. i. f. 3. 



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Hab. Mexico, Cordova (Boucard). 



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2. Iresia pulchra. 



/. boucardi affinis, sed differt abdomine nigro nitido haud rufo. Subcylindrica, nigra, nitida, elytris viridi-cyaneis 

 fascia mediana violacea ; palpis flavis, maxillarium articulis 2, labialium articulo 1, terminalibus nigris ; 

 fronte (inter antennas) labroque flavis hoc basi fusco ; antennis nigris, articulis 1° et 6°-9 m albo-testaceis, 

 10°-ll m fuscis ; elytris basi et apice discrete punctatis medio grosse transversim rugatis ; corpore subtus 

 nigro, pedibus rufo-testaceis, tarsis fuscis. 



Long. 4^ lin. 



(J. 



Hab. Nicaeagua, Chontales (Belt). 





The single example taken by Mr. Belt is a male 



specimen of I. boucardi 



the Salle collection is a female. I cannot, however, think that they are sexes of one 

 and the same species, the colouring of the abdomen and palpi being so widely different. 



CTENOSTOMA. 



Ctenostoma, Klug, Nov. Act. Nat. Cur. x. 2, p. 304 (1821) ; Dej. S 

 Procephalus, Castelnau, Rev. Ent. Silberm. ii. p. 35 (1834). 

 Myrmecilla, Lacordaire, Mem. Soc. Sci. Liege, i. p. 120 (1840). 



biol. cente.-amee., Coleopt., Vol. I. Pt. 1, December 1881 



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