CHGEEIDIUM.— CANTHIDIUM. 47 



eeneum, subauratum ; " some are dark metallic-green, and others brilliant red- 

 coppery. 



CANTHIDIUM. 



Canthidiurn, Erichson, Archiv fur Naturg. 1847, i. p. 109; Harold, Col. Hefte, i. p. 10; ii. 

 p. 60. 



A genus of small Copridse ; like Choeridium, peculiar to America and still more 

 numerous in species. The range is somewhat different from that of the Chceridia, 

 inasmuch as it does not extend to temperate latitudes in North America, although 

 many species occur in the southern temperate zone ; and one, apparently a recent 

 colonist, occurs in the Sandwich Islands. In general the species have nearly the same 

 facies as the Choeridia, and many are only to be distinguished on close examination of 

 their structural characters. In cases of doubt the very short mesosternum is the best 

 guide, this segment being long in Choeridium and separated from the metasternum by 

 an arcuated suture. Nearly ninety species have been described. 



L Canthidiurn haroldi. (Tab. III. fig. 1.) 



Canthidiurn haroldi, Preudhomme de Borre, Ann. Soc. Ent..Belg. xxx. p. Ill (1886) 1 . 



0. lucido (Harold) affine, differt inter alia fronte bituberculata. Eotundato-ovatum, viridi vel cupreo-auratum, 

 politum ; capite punctulato, clypeo nigro et obtuse bidentato, fronte carina brevi obtusa bituberculata ; 

 tborace post medium rotundato-dilatato, subtiliter punctulato (disco lseviore), basi punctis elongatis mar- 

 ginato, linea dorsali leviter impressa ; elytris striatis, striis distanter crenato-punctulatis ; subtus pedi- 

 busque metallicis ; pygidio subtiliter punctulato et alutaceo ; antennis pallidis. 



<$ . Differt tantum tibiis anticis longioribus et angustioribus. Prosternum subtus nullo modo carinatum. 



Long. 6-10 millim. 



Hab. Nicaragua 1 , Chontales (Belt, Janson) ; Panama, Bugaba (Champion). 



This insect is most nearly related to C. steinheili, Harold, and a bluish-black species 

 from Colombia. 



I retain the description written before receiving M. Preudhomme de Borre's paper, 

 as it is drawn up from a large series of examples, M. de Borre having at his disposal 

 only one rather small (7 millim.) specimen. 



We figure an example from Bugaba. 



2. Canthidiurn puncticolle. (Tab. III. fig. 2.) 



Canthidiurn puncticolle, Harold, Col. Hefte, i. p. 39 \ 



Hab. Mexico 1 , Pinos Altos in Chihuahua (Buchan-Hepburn), Cordova, Puebla, 

 Tuxtla (Salle), Cerro de Plumas (Edge); Guatemala, San Joaquin in Vera Paz 

 (Champion).— Sowm America, Brazil 1 . 



In C. puncticolle the inner apex of the anterior tibiae is in the male produced and 

 dentiform, in the female simple; but the spur is slender in both sexes. 



