Figures 2.24


Male external genitalia.
Figures 2.24. Male external genitalia.

(a) Abdominal segment 9 of the bristletail Machilis variabilis (Archaeognatha: Machilidae). (b) Aedeagus of a click beetle (Coleoptera: Elateridae). ((a) After Snodgrass 1957)

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  Dissections of (a) a female American cockroach, Periplaneta americana (Blattodea: Blattidae), and (b) a male black field cricket, Teleogryllus commodus (Orthoptera: Gryllidae).