CLCEOTUS. 125 



description. This species differs from the South-American C. nitens (Guer. & Germ.) 

 chiefly in the stronger sculpture. The frontal tubercle is always round and perfectly 

 isolated. 



13. Cloeotus nitens. 



Acanthocerus nitens, Guerin, Rev. Zool. 1839, p. 299 ; Germar, Zeitschr. fur Ent. iv. p. 136 \ 



Hah. Mexico, Cordova (Salle), Jalapa (Hoge) ; Guatemala, Cerro Zunil, San Isidro 

 (Champion); Nicaragua, Chontales (Belt); Panama, Bugaba (Champion). — South 

 America, Brazil 1 . 



Central-American specimens vary a little in the punctuation of the head, and in the 

 form of the apical angle of the clypeus, the angle being sometimes entire, and sometimes 

 slightly notched; but these differences do not correspond with the variations that 

 exist in the strength of the punctures of the elytra, which, according to Germar, also 

 varies much in Brazilian examples. Examples with triangular clypeus and punctured 

 head with round polished frontal tubercle agree in these respects exactly with C. viridi- 

 pennis, from which C. nitens in all its varieties differs m the sculpture of the apical 

 part of the elytra. In the latter the elytra have their apical portion entirely free from 

 tubercles and sharp carinas ; and the interstices are mostly broad and slightly convex, and 

 separated by single, sharp striae, which become longer from the sutural region towards 

 the lateral margin. C. nitens is also a larger insect than C. viridipennis. 



14. Cloeotus ? 



Hab. Costa Eica, Volcan de Irazu 6000 to 7000 feet (Rogers). 



A single example of a species allied to C. nitens and C. viridipennis is in too 

 damaged a condition to be determined. 



15. Cloeotus viridulus. 



Parvus, globosus, politus, laste viridi-Eeneus, subtus rufo-piceus ; capite plagiatim punctato ; clypeo subtri- 

 angulari, a fronte linea obtusissime elevata separate, margine reflexo, rufo ; thorace sat grosse plagiatim 

 punctato, angulis posticus obtusissimis ; scutello grosse sparsim punctato ; elytris striato-punctatis (punctis 

 oblongis), prope apicem stria suturali sulciforuii, interstitio 2° late lsevi, striis brevibus, sex interstitiis 

 planis, carinula brevi obtusa apud 10 m altera acutiore elongata submarginali ; tibiis posticis extus longi- 

 tudinaliter striatis, apicis truncatura late rotundata. 



Long. 3| millim. 



Hab. Mexico, Misantla (Hoge). Two examples. 



Similar in size and sculpture of the apical area of the elytra to C. excisus, but readily 

 distinguishable by the broad apical truncature of the hind tibise. The thorax and 

 scutellum have a peculiar strong, but sparse, punctuation ; and the clypeus, though 

 obtusely angular or subproduced at the apex, shows no signs of emargination, the 

 margin being reflexed and entire. 



