FIGURES 215–226 in A comparison of external and internal maxilla and mandible morphology of water bugs (Hemiptera: Heteroptera: Nepomorpha)

FIGURES 215–226. 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 Notonectidae: Anisopinae; 215–216. Anisops sardea, 215. The left apex of the maxilla is more narrow and sharp than right one; 216. The right mandibular file with three blunt pegs (bp) and long spines (spl); 217–218. Buenoa uhleri, 217. The right mandibular file with three blunt pegs (bp) and six long spines (spl); 218. The left apex of the maxilla is narrow, the right apex is more blunt; Notonectinae; 219–220. Enithares bergrothi, 219. The left mandibular file with eight blunt pegs (bp) and 14 long spines (spl); 220. The rupturing device hidden; the ventral row of; short bristles on the left maxilla is visible, the distal part of the salivary and food canals also are visible; 221–222. Nychia sappho, 221. The right mandibular file with six blunt pegs (bp) and five long spines (spl); 222. The ventral rupturing device (brvex) of the right maxilla is slightly visible; 223–226. Notonecta glauca, 223. The right mandibular file with five blunt pegs (bp) and eight long spines (spl); 224. Dorsal view of the maxillae, the rupturing device is invisible; 225. Two rows of bristles of the rupturing device (brdex, brvex) are visible when one of the maxilla more protruding than the other; 226. Dorsal and ventral edges of the right maxilla; the inner row of short spines (spvin); external, ventral row of long bristles (brvex) and a short bristle on the dorsal edge (brdex) are visible.