145a (144a). Hind femora extend well beyond apex of abdomen; middle legs arise closer to hind

than to fore legs (Fig.A) (general predators).....................(Hemiptera/ Heteroptera) Gerridae

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A

145b. Hind femora extend little if any beyond apex of abdomen; if middle legs arise close to

hind legs than to fore legs, then fore tarsi have only 1 segment (Fig.A) (general predators)

…………………………………………………………..................(Hemiptera/ Heteroptera) Vellidae

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A