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PINACODEEA. 



187 



PINACODERA. 



Pinacodera, Schaum, Naturg. der Ins. Deutsch. i. p. 294 (1860); Chaudoir, Bull. Mosc. 1875. 

 Planesus, Motschulsky, Bull. Mosc. 1864, ii. p. 240. 



A genus apparently restricted to North America, and nearly equally well represented 

 in temperate as in tropical latitudes. It is of rare occurrence south of Mexico. Nine 



species have been described. 



1. Pinacodera atrata. (Pinacodera amblygona, Tab. VIII. fig. 3.) 



ndis atrata, Clievrolat, Col. Mex. ii. no. 152 (1835) \ 



ndis* niarita. Chaudoir. Bull. Mosc. 1837. vii. p. 6. 



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Pinacodera nigrita, Chaudoir, ibid. 1875 



Var. amblygona, Bates, Proc. Zool. Soc. 1878, p. 606 3 . 

 Var, angulifera, Bates, ibid. p. 606 4 . 



Ilab. Mexico 3 4 , Cruz Blanca 1 2 , San Andres, Puebla, Capulalpam (Salle), Guanajuato 

 (Luges, coll. Salle), Mexico city (SalU, Flohr), San Angel (Flohr), Jalapa, Tehuacan 



(Edge). 



Exceedingly variable in outline and sculpture of the thorax, and in the punctuation 

 and convexity of the elytral interstices. 

 with respect to the obtuseness and smoothness of surface of the thorax, some examples 



P. amblygona represents the extreme for 



having this part so much 



tr> 



perfectly 



off, that they present all the appearance of a distinct species. In Herr Hoge's series 

 from Tehuacan, however, there are all the intermediate variations ; so that even the 

 definition of the form as a variety is impossible. In some female examples the 

 interstices are remarkably flat and obsoletely punctured, besides being subopake 

 with the fine articulation which distinguishes the females of so many species in the 

 Anchomeninse and other subfamilies. In other examples the flattened and reflexed 

 margins of the thorax are rufescent. 



2. Pinacodera chalcea. (Tab. VII. fig. 23.) 



Latior, subdepressa, toto corpore dense erecte piloso, castaneo-rufo, thorace disco seneo-nitido, elytris (epipleuris 

 marginibusque angustis exceptis) olivaceo-viridi-seneis nitidis ; capitis lateribus grosse punctatis, juxta 

 oculos rugulosis ; oculis sat prominentibus, capite post oculos subabrupte angustato, collo constricto laevi ; 

 thorace paullo transverso, lateribus rotundatis, antice citius quam postice angustato, angulis posticis 

 obtusis, margine basali medio late sed minime producto, toto dorso (marginibus inclusis) grosse punctato ; 

 elytris latis, apice oblique et valde sinuato, prope suturam recte transverso, angulo suturali subdentato, 

 dorso piano punctato-striato, interstitiis passim subcrebre punctatis ; unguibus dilatatis pectinatis. 



Long. 4| lin. 



Rah. Guatemala, Capetillo (Champion). 



Nearest allied to P. cribrata, but a broader insect, with elytral interstices less 

 numerously but more strongly punctured, and the apex of the elytra much more 



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