Abstract
The final instar larvae of Acanthagrion gracile and A. lancea are described and illustrated based on reared specimens from Rio de Janeiro and Espirito Santo States, Brazil, being compared with the other known larvae of this genus. The Neotropical genus Acanthagrion Selys is composed by 39 known species, distributed from South-Central United States (Texas) to Central Argentina (von Ellenrieder & Lozano 2008; Garrison et al. 2010). In Brazil, 22 of these species are recorded (Lencioni 2006). At present, the final larval instars of nine species have been described: A. adustum Williamson, A. aepiolum Tennessen, A. apicale Selys, A. ascendens Calvert, A. fluviatile De Marmels, A. hildegarda Gloger, A. indefensum Williamson, A. quadratum Selys and A viduaSelys (Geijskes 1941, 1943; De Marmels 1990, 1992, 2007; Muzon et al. 2001; Lozano et al. 2007; Novelo-Gutierrez 2009).
NSTL