98 Rev. F. W. Hope's Observations on the Genus Cassida, 



MandibulcB crassoe cornese, apice truncate, dentibus duobus ex- 



ternis majoribus. 

 Labrum corneum medio marginis antice emarginato. 

 MaxillcB membranaceae bilobae, lobo externo parvo et coriaceo. 

 Palpi maxillares breves, 1"^° minuto, 2^° et 3*^° subtrigonis, ex- 



timo ovato-acuto. 

 Mentum transversum. 

 Labium parvum trigonum setosum. 

 Lingua maxima et membranacea. 

 Palpi labiates maxillaribus aequales, V^^ brevi, duobus aliis lon- 



gitudine aequalibus, ultimo apice acuto. 

 Elytra oblongo-quadrata, nodoso-convexa. 

 Thorax transversus, margine antico fere recto, lateribus ob- 



liquis, angulis posticis recte truncatis, margine et postico 



in medio angulato. 

 Prosternum latum inter pedes anticos subimpressum. 



The name oi platynota was originally published by Germar, 

 and is therefore retained in preference to that of nodosa of 

 De Jean ; there are other species belonging to it ; some of 

 those in the French collections I regard merely as varieties. 

 The species of this division require a very accurate examina- 

 tion ; none of my acquaintance accord altogether with the 

 above generic characters, they require therefore further sub- 

 division ; the typical insect is from the Brazils, 



Batonota"^, Hope. PL IV. fig. 6. 

 Type of the Genus, Cassida bidens of Fabricius. 



Antennce articulo V^^ crasso, quatuor sequentibus aequalibus 

 minutis, sex sequentibus multo longioribus, et fere longi- 

 tudine aequalibus, ultimo apice conico. 



MandibulcB subquadratae apicibus multidentatis. 



MaxillcB bilobae lobo externo coriaceo. 



Palpi maxillares articulo V^^ brevi, tribus aliis fere aequalibus 

 et praecedenti multo longioribus et crassioribus. 



Mentum transversum. 



Labium parvum subrotundatum et ciliatum. 



Palpi labiates graciles, articulo 1"^^ crasso, duobus aliis aequa- 

 libus et praecedenti pauUo longioribus. 



* From (ixTos, u thonij and t/aros, back, Tliorn-backcd Cassidce. 



