I'-i'i- ! 200 



iiiiiiutely punctate. Pygidium grecniali, closely punctate. Metaster- 

 11 urn shilling, punctate, with a slender, well-defined central sulcus. 

 Pubescence reddish and abundant. 



PlIAN. CUPRICOLLIS. 



Cofjyus atro-c(eruleum vel suhcpneum, thorace eupreo, elytris nigrig, 02)acis, 

 sab.scriceis, suhtiliter striatis, interstitiis j^lanis. Pygidium atro-viride. 

 TibitB antii'cB tridentatce. Long., 19 mm. 



Hah. : Nicaragua, Chontales {Belt., Bouccird, Janson, &c.), Panama, 

 Chiriqui. 



Mas. Caput cupreum, antice nigro-inargiiiatum, cornu nigro erecto subrecurvo 

 antice punctulato, postice ad apicem serratulo. Tliorax granulatus, antice dcclivis, 

 aiigulis productis, disco medio lasvi eubquadrato leriter concavo marginibus cariiiatis, 

 carinis autice denticulo acuto — postice tuberculo conico — termiiiatis ; inter tuber- 

 culos orbiculatim excavatus et ad basin bifoveolatus. 



Mas minor. Capitis cornu breve. Thorax scabrosus, disco medio contracto, 

 laevi, carinulis marginato, denticulis anticis, tuberculisque posticis obtusis, ad basin 

 bifoveolatus. 



Mas etfeminatus. Capitis vertex tuberculo acuto instructus. Thorax sca- 

 brosus ad basin bifoveolatus, supra marginem anticum disco la;vi et quinque 

 tuberculato. 



Femina. Caput nigrum postice plerumque cupreum, fronte transverse carinata 

 et obsolete trituberculata. Thorax cupreo-refulgens, scabrosus, ad basin bifoveolatus 

 et interdum nigro-niaculatus, antice carina media arcuata et trituberculata, tuber- 

 culis nigris. Tibite anticse tarso minuto iiistructae. 



Closely allied to chryseicoUis, Har., with which in collections it is 

 usually confounded. It is easily distinguished by its distinctly mar- 

 gined thoracic disc, and by its basal tubercles being closer together 

 and not incurved at their apices, also by the more granular sloping 

 sides of the thorax. Moreover, it is a more southern species, 

 apparently not occurring further to the north than Chontales, in 

 Nicaragua, whereas chryseicoUis is restricted to Mexico. 



Two other allied forms, nocfis, Bates, and au7'icoUis, Harold, are 

 easily separated from it : the first by the smooth sloping sides of the 

 thorax, and smooth pygidium, the second by the very coarsely punctate 

 posterior surface of the thoracic basal tubercles, and its brilliant green 

 or coppery pygidium. 



In the Biologia Centr. Amer. Col., vol. ii, pt. 2, tab. 4, figs. 2, 2a, 

 a Chontales specimen of cupricoUis has by accident been figured as 

 chryseicoUis, Harold. 



6, Tite Street, Chelsea, S.W. : 

 June, 1891. 



