52 Mr. H. W. Bates on 



medio fortiter dentatis^ angulis posticis dentiformi- 

 bus, supra grosse punctatuSj disco impressione raagna 

 triloba. Scutellum leeve. Elytra oblongo-quadrata, 

 tertia parte basali grosse punctato-rugosa, dein 

 subito crebre subtiliter rugosa ; viridi-senea, basi et 

 medio testaceo translucentia. Corpus subtus glaber- 

 rimum, prosterno gibbo^ laevi. Antennae corpore 

 paulo longiores, robustge^ filiformes, nigrae, articulis 

 4 basalibus cupreis. Pedes rufi^ genicuiis fuscis. 

 Long. 6 lin. 



? . Oblongus, saturate cyaneus, capite thoraceque 

 grossius punctatis^ vix nitidis^ elytris basi tantum 

 micantibus^ miniato-rubris^ fascia sub-basali curvata 

 purpureo-nigra. Sulcus frontalis fundo Itevis. Thorax 

 ut ■ in c? quadratus^ -lateribus medio dente forte 

 armatisj angulis posticis dentiformibus, punctatus 

 scabrosuSj medio impressione magna triloba. Scu- 

 tellum grosse punctatum, opacum. Elytra oblonga, 

 basi convexa^ prope basin fortiter punctato-rugosa, 

 dein subito subtiliter rugosa. Antennee corpore 

 paulo breviores, minus robustge^ filiformes^ cyaneae, 

 basi cupreo-violaceae^ articulis 3-7 supra sulcatis. 

 Corpus subtus cyaneum^nitidissimum. Pedes cyanei, 

 genicuiis et tibiis aj)ice violaceis, tarsis rufis. 



Long. 10-12 lin. 



This beautiful species is readily distinguished in the 

 female from P. Irifasciatus by the elytra having only one 

 dark fascia^ and that near the base^ commencing below 

 the shoulder^ and curving towards the suture^ which it 

 does not reach ; the rest of the elytral surface is of a 

 clear red-lead colour^ or dark vermillion, almost opaque, 

 except near the base, where it has a metallic lustre. The 

 slender 11 -jointed antennse distinguish it at once from 

 the female of P. nigricornis, Guer., besides the colour. 

 I obtained three female specimens of precisely similar 

 colours, two of which are in my own collection. The 

 males of these closely-allied species are less easily to be 

 distinguished ; I obtained only one example with the 

 three females ; but have seen a second, similar in size, in 

 Mr. Fry^s collection, also from Para. The antennse are 

 hotably more slender than in the ($ of P. nigricornis, 

 and the terminal joint is much less elongate, being very 

 little longer than the penultimate, whilst it is half as long 



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