with Characters of Sioc New Genera. 99 



Elytra humeris in lobum maximum angulatum antice por- 



rectis, spina erecta in medio suturae elongata, acuta. 

 Thorax antice rotundatus subemarginatus^ dorso subcarinato. 

 Prosternu7n oblongum subplanum in medio impressum. 



To the genus Batonota belongs also the Cassida truncata of 

 Fabricius from Cayenne, C. pugionata of Hoffinansegg and 

 laticollis, Mihi, and others, which are undescribed. Those 

 spine-backed species with the humeral angles of the elytra 

 ought to belong to a subgenus, the description of which I leave 

 for future authors. 



The above six genera are detached from the genus Cassida, 

 and may be ranged under the family Cassididae till the fami- 

 lies are more accurately characterized. Those forms have 

 chiefly been selected which differ considerably in their out- 

 ward appearance, and various others might have been added. 

 If at a future time a similar communication on this group or 

 any other is thought worthy of insertion in the ^ Annals of 

 Natural History,^ the writer when possessed of more leisure 

 may be induced to accede to the requests of the Editor, as he 

 has on the present occasion. 



References to Authors, 



Besides consulting the general works of Linnaeus, Herbst, 

 Fabricius, Olivier, and Schonherr, for the description of nu- 

 merous species of Cassidoidea, the entomologist is referred to 

 the following authors who have written on the Cassidce of par- 

 ticular countries. 



Europe, — Of England I mention Marsham^s Coleoptera; 

 Mr. Kirby^s Memoir in the Linnaean Transactions, vol. iii. ; 

 Stephens^s Outlines of Entomology; Curtis^s Genera, and 

 the Entomologia Edinensis, by James Wilson. 



Of Sweden — I give the names of DeGeer, Paykull, and Gyl- 

 lenhall. 



Of France — Reaumur, Latreille, Guerin and Percheron, 

 Dufour, and Baron Walckenaer. 



Of Holland—Fri^ch, 



Of Germany — Those of Schrank, Duftschmidt, and Panzer. 



North and South America — For the Cassidae of the New 

 World consult the following works : — Say's Writings ; Species 

 Insectorum, by Germar ; Vigor's in the Zoological Journal ; 



