48 LAMELLICOENIA. 



3. Canthidium aurifex. (Tab. III. fig. 3, 4 .) 



C. rutilo (Harold) proxime affinis ; differt $ tibiis anticis intus apice hand productis. Breviter oblongo- 

 ovatum, splendide viridi-asneum vel cupreum aureo relucens ; capite punctulato, clypeo breviter bidentato, 

 fronte trituberculata ; tborace subtilissime baud dense punctulato, lateribus prope foveam tumidis ; elytris 

 punctato-striatis, interstitiis subtilissime rugulosis ; pygidio fortius punctato ; pedibus metalliois. 



4 • Tibiae anticae apice intus acute products ; calcare dilatato, apice truncato vel bifido. 



$ . Tibiae anticse apice intus rectse nee productae ; calcare gracili, acuto. 



Long. 3|-5 millim. 



Hab. Panama, Bugaba (Champion). 



The South-American C. rutilum is similar in size, colour, and sculpture to this 

 insect, but differs in the inner apex of the anterior tibiae being produced into a triangular 

 tooth in both sexes. It appears also to be rather shorter and more spherical in 

 shape. 



4. Canthidium ardens. 



C. rutilo et C. aurifici simile. Supra et subtus cupreo-auratum, politum • clypeo rugulosum, fronte trituber- 

 culata ; thorace laevi, medio basi punctulato : elytris subtiliter striatis, striis impunctatis ; pygidio sub- 

 tilissime punctato. 



4 . Tibiae anticse apice intus dentiformiter productae et deflexae ; calcare sicut in 2 gracili acuminato. 



$ . Tibiae anticae apice intus acute angulatae. 



Long. 3|-5 millim. 



Hob. Nicaragua, Chontales (Janson) ; Panama, Bugaba, Volcan de Chiriqui (Cham- 

 pion). 



Differs from the numerous closely-allied species of similar form and size and brilliant 

 metallic colouring by its faintly impressed elytral striae, in which there is no trace of 

 the accustomed transverse punctures, except in rare cases when a few are perceptible in 

 the sutural stria. Mr. Champion collected a very large series of the species, more 

 females than males, all of the same golden-coppery colour with green reflection in 

 certain lights. The following local variety differs only in colour. 



Var. C. mutatum. Saturate viridi-aeneum, splendidum ; corpore subtus et pedibus concoloribus. 



Hah. Costa Rica (coll. Sates). 

 One example. 



5. Canthidium rhodopus. 



Parvum, fere orbiculare, cbalybeo- vel aeneo-nigrum, antennis et pedibus testaceo-rufis ; supra (elytris subtilius) 

 punctulatum ; fronte tuberculata, clypeo bidentato et utrinque flexuoso ; elytris subtilissime striatis, striis 

 distanter punctulatis. 



Tibiae anticae apice intus dentiformiter productae et deflexae • calcare (utroque sexu ?) gracili. 



Long. 4 millim. 



Hob. Guatemala, Zapote (Champion). 



In structure most nearly allied to C. ardens, but in colour and punctuation more 



