CANTHIDITTM. 49 



nearly resembling C.puncticolle. The elytral striae are very faintly impressed and marked 

 at distant intervals with minute punctures ; the interstices rather closely and very 

 finely punctured, besides being minutely shagreened. The thorax is more strongly 

 punctured, but less so than in the ordinary blue Mexican form of C. puncticolle. The 

 clypeus is rather coarsely and subrugosely punctured (far more so than in G. ardens), 

 the vertex behind less densely punctured. 



6. Canthidium laetum. 



Canthidium Icetum, Harold, Col. Hefte, i. p. 53 \ 



Hab. Mexico 1 ; Guatemala, Senahu (Champion). 



According to the description this species must be similar to C. aurifex in form and 

 sculpture, having a trituberculate forehead, smooth thorax, and crenate- striate elytra, 

 in which the sutural stria is more deeply impressed than the others ; the colour differing 

 in being bright green or slightly coppery-green. This description nearly suits a species 

 of which Mr. Champion met with two examples in Guatemala ; but I have seen no 

 Mexican specimens to fit it. A specimen labelled C. Icetum, in Von Harold's hand- 

 writing, in the Salle collection does not at all agree with the description, the forehead 

 being unarmed, the thorax as strongly punctured as in C. puncticolle, and the sutural 

 stria not more deeply impressed than the others. 



7. Canthidium ? 



Hab. Panama, Bugaba (Champion). 



A single example 2f- millim. long, possibly a dwarfed individual of C. ardens, but 

 with the forehead unarmed. 



8. Canthidium ? 



Hab. Guatemala, Senahu (Champion). 



Also a single example of difficult determination, only 3 J millim. long, the forehead 

 unarmed ; the sculpture of the elytra similar to that of G. Icetum, but the colour 

 brilliant red-coppery. 



9. Canthidium angusticeps. (Tab. ill. fig. 4.) 



O. lucido et G. haroldi simile, sed differt capite angustiore ; clypeo elongato, supra concavo, et margine 

 utrinque sinuate*. Supra et subtus rubro-cupreum, nitidum, elytris viridi-relucentibus ; capite discrete 

 subtilissime punctulato, fronte breviter carinata et sub-bidentata ; thorace medio basi triangulariter 

 sublobato et depresso, linea dorsali parum impressa, basi rotundato-punctulata nee marginata; elytris 

 crenato-striatis, interstitiis fere planis ; pygidio punctate-, basi subruguloso ; metasterno basi dense punc- 

 tulato. 



5 ? Tibiae anticse valide tridentatse, apice obliquis ; calcare elongato validissimo. 



Long. 51-8 millim. 



biol. cente.-amer., Coleopt., Vol. II. Pt. 2, May 1887. HH 



