Figs. 44–56 in The Predaceous Diving Beetles (Coleoptera: Adephaga: Dytiscidae) from the Miradores Lagoon, Veracruz, Mexico

Figs. 44–56. Morphological structures of Dytiscidae. 44) Elytra, Laccophilus gentilis suavis; 45) Anterior margin of eyes emarginate in Copelatinae and Colymbetinae; 46) Anterior margin of eyes not emarginate in Cybistrinae and Dytiscinae; 47) Male protarsomeres of Rhantus; 48–49) Male protarsomeres of Cybister and Dytiscus; 50) Metacoxal lines in Copelatus; 51) Lateral view of aedeagus in Copelatus distinctus; 52) Lateral view of aedeagus in Copelatus caelatipennis fragilis; 53) Metatibial spurs of Megadytes; 54) Metatibial spurs of Dytiscus; 55) Dorsal view of Thermonectus circumscriptus; 56) Dorsal view of Thermonectus b. basillaris. Fig. 44 taken from Zimmerman (1970); Figs. 45–50, 53, 54 from Arce-PÉrez and Roughley (1999); Figs. 51, 52 from Young (1963); Figs. 55, 56 from GoodhueMcWilliams (1968).