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XXIII. Descriptions of some New Species of Chrysome- 

 lidae. By J. S. Baly, Esq. 



[Read 2ncl March. 1857.] 



The present paper contains principally descriptions of insects 

 lately added to my collection, in addition are a few others well 

 known to collectors, but hitherto bearing only manuscript names. 



Genus Dorysterna, Guer. 

 Sp. 1. Dorysterna tibialis. 



Ovata, valde convexa, nitida, fulvo-testacea, antennis extrorsum 

 nigris, elytris viridi-aeneis, margine postico rufo-testaceo, 

 tibiis anticis curvatis, apice dilatatis. 



Long. 5 lin. 



Ovata, valde convexa, fulvo-testacea, nitida. Caput lenuissime 

 punctatum, mandibulis apice antennarumque articulis ultimis 

 quatuor, nigris. Thorax transversus, longitudine triplo latior, 

 apice late concavo-emarginatus, lateribus rotundato-expla- 

 natis, basi emarginatis ; supra convexus, utrinque leniter 

 excavatus, teiiuiter punctatus. Scutellum laeve. Elytra 

 thorace vix latiora, valde convexa, apice late rotundata, late- 

 ribus infra basin pauUo explanatis, obsolete angulatis ; dis- 

 tincte punctata, punctis in striis plurimis dispositis ; laete 

 viridi-aenea, marginis lateralis dimidio postico rufo-fulvo. 

 Tibiae anticae elongatae, ultra medium curvatae, apice dila- 

 tatae. 



Upper Amazons. 



Sp. 2. Dorysterna cruentata. 



Oblonga, convexa, rubra, elytris metallico-olivaceis, sutura 

 limboque anguste rubris, antennis extrorsum nigris. 



Long. 41 lin. 



Caput indistincte punctatum ; oculis, mandibularum apice an- 

 tennisque extrorsum, nigris. Thorax transversus, apice valde 

 subqiiadrato-excavatus, lateribus basi ad apicem angustatis, 

 angulis anticis obtusis ; supra convexus, punctatus, utrinque 

 vix excavatus. Elytra oblongo-ovata, convexa, subopaca, 

 tenuiter punctato-striata, striis ad apicem fere obsoletis ; 

 viridi-olivacea, limbo suturaque rubris. Corpus subtus nitido- 

 rufo-testaceum. 



Brazil. 



