The genus Calligaster de Saussure (Hymenoptera: Vespidae: Zethinae) in the Philippine Islands Author Selis, Marco Via dei Tarquini, 22 - 01100 Viterbo, Italy. Author Femia, Arturo 0000-0002-6571-2741 Via G. Gozzi, 15 - 50141 Firenze, Italy. arfem 93 @ gmail. com; https: // orcid. org / 0000 - 0002 - 6571 - 2741 arfem93@gmail.com text Zootaxa 2022 2022-06-20 5155 1 124 132 journal article 77862 10.11646/zootaxa.5155.1.6 dac9d493-3f9f-4432-a7cf-b6987cac23a1 1175-5326 6669316 28658B55-F7E0-42FE-B957-F8E0BDC45472 Key to the species of Calligaster occurring in the Philippine Islands 1 Parapsidal furrows shallow, with few punctures. Anterior margin of scutellum with a shallow and irregular transverse furrow; scutellum dull with fine punctures ( Fig. 8 ). Male clypeus regularly convex, apical emargination semicircular and as wide as deep ( Fig. 5 ). Female clypeus more sparsely punctured on the disc ( Fig. 6 ). Head entirely black in both sexes............................................................................................... C. williamsi Bequaert - Parapsidal furrows defined and deep, densely punctured. Anterior margin of scutellum crenate, forming six deep pits; scutellum weakly shiny with big deep punctures and micropunctate interspaces ( Fig. 7 ). Male clypeus with a median transverse depression, apical emargination wider than deep ( Fig. 3 ). Female clypeus more densely punctured on the disc ( Fig. 4 ). Male with yellow lines on mandible and scape and rounded yellow spots above antennal insertions........ C. ilocana Selis , sp. nov.