FIGURES 246–255 in A comparison of external and internal maxilla and mandible morphology of water bugs (Hemiptera: Heteroptera: Nepomorpha)

FIGURES 246–255. The shapes of the apices of the maxillae, the shape of the mandibular file, and the shape of the rupturing device on the maxillae in the Corixidae: Corixinae; 246–247. Agraptocorixa hyalinipennis, 246. The the apex of left maxilla is narrow has hook, a part of the left mandible (Lmd) is visible; 247. The apex of the right maxilla with seven short spines (sph), the apex of the left maxilla with a long hook (ho); 248–249. Corixa punctata, 248. A part of the left mandible, the two plates (pm) only are visible; 249. The edge of the right maxilla with short spines (sph); Stenocorixinae; 250. Stenocorixa protrusa, the apex of the left maxilla with a hook (ho), the left mandibular file with plates (pm); 251. Ectemnostegella montana, the apex of the left maxilla ended by a sharp hook (ho) and the right mandibular file (Rmd) with several massive plates (pm); Cymatiinae; 252–253. Cymatia coleoptrata; 252. The mandibular file with seven massive plates (pm); 253. The shape of ends of the maxillae; Micronectidae; 254. Micronecta quadristrigata, the left mandibular file with seven plates (pm), the left maxilla partly visible; Diaprepocoridae; 255. Diaprepocoris zealandiae, the right mandibular file with seven plates (pm).