Shields of larvae and pupae in four tribes of Cassidinae (Coleoptera: Chrysomelidae) 19 Hemisphaerotini: Hemisphaerota Chevrolat, 1836 20 Ischyrosonychini: Physonota Boheman, 1854 21 Cassidini: Agroiconota bivittata (Say, 1827) 22 Aspidimorpha sanctaecrucis (Fabricius, 1792) 23 Cassidini: undetermined sp. 1 24 Cassidini: undetermined sp. 2 from Africa, collected by C.S. Chaboo 25 Cassidini: undetermined sp. 3 pupa from Brazil, collected by D. Yanega 26 Cassidinae: Undetermined sp. 4 Costa Rica, collected by K. Nishida. Darkened sections = faeces. Redrawn by L. Schletzbaum from original sources or from specimens.