Description Of The Mature Larva Of Austrolimnius Nyctelioides (Germain, 1892) And A-Elatus Hinton, 1941 (Coleoptera: Elmidae)

Mature larvae of two species of the riffle beetle genus Austrolimnius Carter & Zeck, 1929 are described and illustrated for the first time: Austrolimnius nyctelioides (Germain, 1892) and A. elatus Hinton, 1941. A larval diagnosis for the genus is presented and both larvae are compared with each other and with the previously described larva of A. mucubajiensis Gomez & Bello, 2006. Comments on the species' habitats are included.