Figs. 20-27 in Guide To The Aquatic Heteroptera Of Singapore And Peninsular Malaysia. V. Hydrometridae

Figs. 20-27: 20-24: Hydrometra brevitarsus Zettel & Yang; 20. Apex of head, dorsal view showing anteclypeus; 21. Male terminal abdomen, lateral view; 22. Male terminal abdomen, ventral view; 23. Female terminal abdomen, dorsal view; 24. Female terminal abdomen, lateral view. 25-27: Hydrometra carinata Polhemus & Polhemus; 25. Apex of head, dorsal view showing anteclypeus; 26. Head, lateral view (AC, anteclypeus; Gl, gular lobe; MXP, maxillary plate); 27. Female terminal abdomen, lateral view.