Coccinellidæ.
Diptera, branching into 4 (Gegenbaur); in Culicidæ, and Psychoda, 5.
Siphonaptera, 4.
Polynephria
Orthoptera, 100–150. (In embryo Blattids, 4; in embryo locust, 10; in nymph of Gryllotalpa, 4.)
Dermaptera, “over 30” (Schindler).
Perlidae, 50–60.
Plectoptera (Ephemeridæ), 40.
Odonata, 50–60.
Hymenoptera, 20–150. (In embryo bees only 4; Cynipidæ, Ichnenumonidæ, and Formicidæ have the smallest number, 6–12.)