FIGURE 21 in Revision of the Neotropical species of Trichacis Foerster (Hymenoptera: Platygastroidea: Platygastridae), with description of 24 new species

FIGURE 21. Variation observed in extent and shape of the hyperoccipital carina. A–E. A, hyperoccipital carina absent (Trichacis acarinata Arias-Penna & Masner, n. sp. Ƥ holotype). B, complete, reaching the eye margin (Trichacis proximata Arias-Penna & Masner, n. sp. Ƥ holotype). C, incomplete, fading before reaching level of imaginary line (= the white line on the figure) connecting eye inner margin to posterior cephalic margin (Trichacis acuta Arias-Penna & Masner, n. sp. Ƥ holotype). D, incomplete but surpassing level of imaginary line (Trichacis panamana Arias-Penna & Masner, n. sp. Ƥ holotype). E, incomplete, surpassing level of imaginary line, curving up and merging with stria running along the eye inner margin (Trichacis fernandezi Arias-Penna & Masner, n. sp. Ƥ holotype). White arrows indicate the extremities of the hyperoccipital carina when present.