Figures 5.3


Two males of Phytalmia mouldsi (Diptera: Tephritidae) fighting over access to the oviposition site at the larval substrate visited by females.
Figures 5.3. Two males of Phytalmia mouldsi (Diptera: Tephritidae) fighting over access to the oviposition site at the larval substrate visited by females.

These tropical rainforest flies thus have a resource-defense mating system. (After Dodson 1989, 1997)

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  Relationship between length of horn and body size (thorax width) of male scarabs of Onthophagus taurus.
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  Posterior ends of a pair of copulating milkweed bugs, Oncopeltus fasciatus (Hemiptera: Lygaeidae).