FIGURES 7 – 13 in Description of the preimaginal stages of three species of the genus Tropisternus Solier, subgenus Strepitornus Hansen (Coleoptera: Hydrophilidae), with emphasis on morphometry and chaetotaxy

FIGURES 7 – 13. Tropisternus scutellaris, first-instar larva: 7, left mandible, dorsal view; 8, right mandible, dorsal view; 9, left maxilla, dorsal view; 10, right maxilla, ventral view; 11, left antenna, dorsal view; 12, labium, dorsal view; 13, labium, ventral view. Scale bars = 0.1 mm