30 LAMELLICOENIA. 



differ in being silky opaque — a little more shining near the suture, and the striae 

 though very shallow, are much more distinct. The thorax is dark brassy-green, with 

 a brilliant golden-coppery tinge on the disc. The upper tooth of the anterior tibige m 

 small and distant from the two lower teeth, and the hinder tibise are sharply bicarinate 

 down their outer edges and grooved between the carinas, as in C. lamprimus. 



11. Canthon raripilus. (Tab. II. fig. 9.) 



Parvus, rotundatus, nitidus, viridi-cyaneus, passim (ventre exeepto) sat grosse discrete punctatus, punctis griseo- 

 piliferis ; clypeo oblique angustato, bidentato ; tborace minus convexo, medio utrinque acute angulato et 

 antice arcuato denticulatoque ; elytris subtilissime striatis ; pygidio nitido ; prosterno transversim carinato ; 

 tibiis 4 posticis mediocriter dilatatis, extus arcuatis ; tibiis anticis apice truncatis, dente superiore remoto 

 et minore. 



Long. 3-4| millim. 



Hal. Panama, Taboga Island, San Miguel in the Pearl Islands (Champion). 



Apparently closely allied to C. juvencus, Harold, but differing in the shining pygidium 

 studded with large piliferous punctures ; in C. juvencus the pygidium is described as 

 " opacum, lseve." The species belongs to the same group as the preceding and to the 

 subgroup having sharply bicarinate and grooved outer edge of the posterior tibiee. 

 The scutellar depression is very slight. The punctures on the head and thorax are 

 large and equally distributed ; on the elytra they are rather smaller and arranged in 

 two rows along each interstice. 



12. Canthon viridis. 



Copris viridis, Beanv. Ins. Afr. et Am. p. 23, t. 3. fig. 2 (1805) \ 



Onthophagus viridicatus, Say, Bost. Journ. Nat. Hist. i. p. 173 (1835) a ; Complete Writings, ii. p. 648. 



Canthon viridis, Harold, Berl. ent. Zeitschr. 1868, p. 112 3 ; Horn, Trans. Am. Ent. Soc. 1870, 



pp. 44 & 47 \ 



Hab. North America *■ 2 3 4 . — Mexico 3 , Cordova, Orizaba, Etla, Cuernavaca, Yolo- 

 tepec, Parada (Salle), Ventanas, Mexico city, Iguala, Cerro de Plumas, Acapulco, 

 Tapachula (Hoge), Tehuantepec (Sumichrast) ; British Honduras (Blancaneaux) ; 

 Guatemala, Duenas, Capetillo, Cahabon, Teleman, Panzos (Champion); Nicaragua, 

 Granada (Salti), Chontales (Janson) ; Central America 4 . 



Of similar general form and colours to C. ccelius and its allies, and agreeing with them 

 in the arcuated outer edge of the posterior tibiae, but these organs are scarcely so broadly 

 dilated. It is distinguished, however, from the group by the anterior tibiae being 

 abruptly dilated on the inner side from before the middle to the apex. Von Harold 

 admits a wide range of variation within the species; and it is, in fact, impossible to 

 detect valid differences between violet-coloured impunctate Mexican examples 7 millim. 

 long, and brassy-green North-American specimens only 4 millim. long. The small 

 bright green form, moreover, co-exists with the large examples of the violet and blue- 



