ABSTRACT Great advances were made in recent years regarding the description of immatures of Cassidinae and their taxonomy as a whole, but many taxa remain undescribed. This study focuses on updating morphological data for Hybosa acutangula Spaeth, 1913 (Chrysomelidae: Cassidinae: Ischyrosonychini), a tortoise beetle native of South America, which was collected in Fridericia florida (DC.) L. G. Lohmann in the Brazilian Cerrado. We provide descriptions and illustrations of the morphology of the larva, pupa, and genitalia of adults, all of which are novel for this genus. The main discerning features for this species among other Ischyrosonychini are the lack of dark patterns in the dorsum of either the larvae, being limited to the dark scoli and the cranium, or the pupae, and a much reduced anal fork. We also present the first record of parasitism by Chalcididae wasps, Brachymeria sp. Westwood, 1832 and Conura sp. Spinola, 1837. Morphological comparisons remain limited demanding further studies with other species of Ischyrosonychini, as to better understand the placement of this species within the taxonomy of tortoise beetles. whole undescribed Spaeth 191 Chrysomelidae (Chrysomelidae , Ischyrosonychini) America DC. DC (DC. L G Cerrado larva pupa adults genus larvae cranium pupae fork wasps sp Westwood 183 Spinola 1837 beetles 19 (DC 18 1

ABSTRACT Oedionychina Chapuis, 1875 is a diverse subtribe of Alticini leaf beetles, posing challenges and complexity in study due to mimicry and poorly informative descriptions. Herein, we propose geometric morphometrics as a tool for identifying polymorphic species of Alagoasa Bechyně, 1955, without the need for dissection. Thirteen anatomical landmarks on the thorax were applied to Alagoasa decemguttata (Fabricius, 1801), Alagoasa plaumanni Bechyně, 1955, and Alagoasa scissa (Germar, 1824). Canonical Variate Analysis (CVA) graphs effectively distinguished the three species. The most pronounced shape differences were observed between A. decemguttata and A. plaumanni, and between A. decemguttata and A. scissa. No shape variation was detected between A. plaumanni and A. scissa in the deformation grid. Geometric morphometrics proved to be a more precise method for describing and quantifying morphological differences in the thoracic shape of polymorphic Alagoasa beetles. Chapuis 187 beetles descriptions Herein Bechyně 1955 dissection Fabricius, Fabricius (Fabricius 1801, 1801 , 1801) Germar, Germar (Germar 1824. 1824 . 1824) CVA (CVA A grid 18 195 180 182 1 19

Abstract An updated morphological description for Omophoita elytralis (Bechyné, 1956), stat. nov., is presented, including the first account of the genitalia for this species. The separation Omophoita elytralis from O. octoguttata (Fabricius, 1775) is supported by differences found in the median lobe of males, elytral tegument uniform in color (not patterned), and their allopatric geographical distribution. Bechyné, Bechyné (Bechyné 1956, 1956 , 1956) stat nov nov. presented species O Fabricius, Fabricius (Fabricius 1775 males not patterned, patterned patterned) distribution 195 177 19 17 1

Abstract The third instar larva and pupa of Macraspis morio Burmeister, 1844 (Rutelinae: Rutelini: Anticheirina), collected in Paraná, Brazil, is described and illustrations and comments are given. The larva differs from other Macraspis larvae by the head with 6 posterofrontal setae and mandibles with a blunt second left incisor tooth. The pupa is similar to that of M. festiva Burmeister, 1844.