Stalkeyed flies

I he most recognizable feature of these small flics is the head. This is extended on both sides into stalks that bear the eyes and the antennae. The eye stalks are larger in the males and may be absent in the females.

• Klll; CYCLE Lggs are stuck onto young foliage or rotting vegetation. Males engage in combat over territories and females. Those with more widely spaced eyes tend to have more success in finding mates.

• OCCURRENCE Tropical regions, especially Africa. Absent from South America, and only one very short-stalked species occurs in North America. Often found near or on vegetation __ ■ , or close to ^CCIXLIIP^

running water.

eye at end of long stalk

Larvae taper at both ends and have smooth, hairless bodies.

short spines project front rear of thorax

CYRTOMOrSlS DALMANNI is found in parts of Southeast Asia. Its larvae bore into the stems of various grass species.

Larval feeding habits 0 ^

brilliant metallic-green body male genitalia long, pale legs

A POECII.OBOTHRIS NOBIUTATUS males are often found on patches of bare mud, in the sun. They wave their wings to display them to females.

rounded head metaUn bronze sheen

Scf l.u 'S NOTATA is a fairly common British species. It is usually found in grassy areas.

darkened reins on wings

Order Dn>TKRA

Family DqijchoPQDIDAE

No. of species ^ cqa

Long-legged flies

1 hese small, bristly flics are metallic-bronze, -green, or -blue. The rounded head has a short, fleshy proboscis, and the legs arc distinctively long and slender.

• I J EE CY(]LE I sually, eggs are laid, and the larvae arc found, under bark and in wet soil, water, mud, leaf litter, and seaweed. The larvae mostly cat other insects, while the adults cat soft-bodied insects or feed on nectar.

• OCCl IRRENCE Worldwide. In damp meadows, woods, and streams and at lakesides and seashores.

• REMARK Some larvae are predators of pests such as the larvae of bark beetles or mosquitoes.

brilliant metallic-green body male genitalia metaUn bronze sheen smoky patches on wings •—

rounded head long, pale legs

Scf l.u 'S NOTATA is a fairly common British species. It is usually found in grassy areas.

larvae are pale and taper slightly to the front. The rear of the abdomen often has four lobes.

darkened reins on wings

<ulillllii2

A POECII.OBOTHRIS NOBIUTATUS males are often found on patches of bare mud, in the sun. They wave their wings to display them to females.

Family HrosophILIDAK

No. of species 2 900

Larvae have hooked spines all around each segment.

translucent wings

< drosophha me !an og aster is the best known pomace fly. It is often used for genetics studies since it breeds quickly and has large chromosomes in its salivary glands.

curved bristles on bark bright red eyes

adrosoph1ia species are © often attracted to rotting >

fruit. The one shown here is feeding on a piece of apple.

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