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ADEPHAGA. 







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Of this peculiar and highly characteristic Tropical- American genus thirty-five species 

 ? been described. It is doubtful whether any species occurs beyond the tropics 



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th or south, the locality 



Ay 



given by Klug for his C. macilentum 





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g not well authenticated. Its nearest ally is the genus Pogonostoma, pecul 







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Madagascar. 



1. Ctenostoma sallaei. 



Ctenostoma sallei, Chaudoir, Bull. Mosc. I860, ii. p. 275 



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Hab. Nicaragua, Chontales (Belt) ; Panama, Chiriqui (Champion). — South America, 



Venezuela \ 





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I refer Cen tral- American examples of this remarkable insect to C. sallcei of Chaudoir, 

 relying chiefly on the scantier punctuation of the elytra mentioned in the description. 

 In this character all the specimens differ from C. insigne of the Amazons, and inferentially 

 from C. metallicum of Cayenne. In colour they are purplish coppery brown (rarely 

 with a greenish tinge) ; but they greatly exceed the size (14 millim.) given by Chaudoir, 

 varying from 16 to 20 millim. 







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2. Ctenostoma maculicorne. (Tab. I. fig. 21.) 



Procephalus maculicornis , Chevrolat, Rev. et Mag. Zool. 1856, p. 352 1 . 



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Ctenostoma sigma, Bates, Proc. Zool. Soc. 1878, p. 588 2 . 



Hab. Mexico \ Toxpam (Salle) ; Guatemala, San Juan (Champion) ; Nicakagua, 

 Chontales (Belt 2 ) ; Panama, Chiriqui (Champion). 



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€. sigma is identical with C. maculicorne, according to the type specimen in the Salle 



collection ; but there is nothing in the coloration of the antennae to warrant the specific 



name given, 

 fascia of the elyt 



Chiriqui examples differ slightly in the more strongly flexuose S-like pale 





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3. Ctenostoma laBticolor. 



Ctenostoma laticolor, Bates, Proc. Zool. Soc. 1878, p. 588 



Hab. Nicaragua, Chontales (Janson). 





4. Ctenostoma ibidion. 



Ctenostoma ibidion, Dohrn, Stettin, ent. Zeit. 1880, p. 372 2 



Hab. Costa Eica l . 



Evidently 



from the preceding, by the dense punctuation of the elyt 



small size (10 millim.), and colours. 



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