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Myzus persicae - an alate green peach aphid.
Author:Scott Bauer
Source: Wikimedia Commons
Aspidiotus nerii (click on image to enlarge it)
Author(s): Charles Olsen, USDA APHIS PPQ
Source: IPM Images

Sternorrhyncha (aphids, scale insects, mealybugs, psyllids and whiteflies)

This suborder includes plantsucking bugs where the rostrum appears to originate from the sternum. The antennae are well developed and gradually decreasing in width towards their ends. The tarsi have 1 or 2 segments. They often form colonies on plants and are not very mobile. In the superfamily Coccoidea only the males have (one pair of) wings.

The group includes more than 15,000 species world-wide. Agriculturally important pest species are found in the families listed below. Among others, these include the adelgids (Adelgidae), whiteflies (Aleyrodidae), true aphids (Aphididae), soft scales (Coccidae), armoured scales (Diaspididae), conifer aphids (Lachnidae), mealybugs (Pseudococcidae) and different families of psyllids like the Psyllidae.

Families of Sternorrhyncha (plant pests):