Key to females of Neotropical Esagonatopus modified from Olmi & Virla (2014) 1. Metapectal-propodeal complex completely reticulate rugose................................................................ E. antonioi sp. nov. Martins - Metapectal-propodeal complex granulate or striate, not reticulate rugose ....................................................................................... 2 2. First abdominal tergum of metapectal-propodeal complex totally granulated, not transversely striate ........................................... 3 - First abdominal tergum of metapectal-propodeal complex strongly transversely striate.................................................................. 4 3. Protarsomere 5 with three rows of lamellae and distal apex provided of more than 20 lamellae (Plate 146C in Olmi & Virla 201 4) ........................................................................................................................................................................................ E. olmii Virla - Protarsomere 5 with two rows of lamellae and distal apex provided of less than 20 lamellae ...... E. minuslamellatus Olmi & Virla 4. Mesosoma black, except distal apex of first abdominal tergum black-testaceous ................................................. E. angelicus Virla - Mesosoma mostly testaceous or ferruginous, enlarged claw with one small subapical tooth ............................ E. neotropicus Olmi

Published as part of Martins, André Luis, 2018, A new species of Esagonatopus Olmi (Hymenoptera, Dryinidae) from Central Brazil, pp. 441-444 in Zootaxa 4379 (3) on page 443, DOI: 10.11646/zootaxa.4379.3.9, http://zenodo.org/record/1174878