Dineutini (10.3897-zookeys.718.20726) Figures 19–31

Description:

Figures 19–31; Larval structures (instar I). 19–20 Cephalic capsule, dorsal view 21–26 Anterior margin of frontoclypeus, dorsal view 27–29 Stipes, lacinia and galea, dorsal view 30–31 Tracheal gills, dorsal view 19 Macrogyrus (Andogyrus) seriatopunctatus (Régimbart, 1883) 20 Macrogyrus (Macrogyrus) oblongus (Boisduval, 1835) 21 Gyretes sp. 22 M. (A.) seriatopunctatus 23 M. (M.) oblongus 24 Enhydrus sulcatus (Wiedemann, 1821) 25 Dineutus sinuosipennis Laporte, 1840 26 Dineutus sp. (specimen from Bayfield County, Wisconsin, USA) 27 Gyrinus monrosi Mouchamps, 1957 28 M. (M.) oblongus 29 D. sinuosipennis 30 E. sulcatus 31 D. sinuosipennis.