resemble bumble bees; some have a very long and slender abdomen, and resemble damselflies. They occur in a variety of habitats and are predaceous, often attacking insects larger than themselves. Larger species can inflict a painful bite if handled carelessly. Larvae occur chiefly in soil or decaying wood, and some are predaceous on larvae of other insects.

ROBBER FLIES - Leptogaster

MYDAS FLIES Family Mydidae See also PL 13

Identification: Large flies, about 1 in. Elongate, bare, blackish, some with 2nd abdominal segment yellowish or orange. Antennae long, 4-segmented, last segment somewhat swollen. 1 ocellus or none. Top of head somewhat hollowed out between eyes. Mi ends at or in front of wing tip.

Members of this small group are not very common. Adults are predaceous. Larvae occur in decaying wood or in soil.

BEE FLIES Family Bombyliidae See also Pl. 13

Identification: Usually stout-bodied and hairy. 3rd antennal segment variable in shape. Mi ends behind wing tip. 3 or 4 posterior cells. Discal cell present. Anal cell open or closed near wing margin.

Bee flies are mostly medium to large, and are usually found on flowers or resting on the ground in open areas. The wings at rest are held outstretched. Some have patterned wings, and some have a very long proboscis (but do not bite). Larvae are parasites of other insects.

DANCE FLIES Family Empididae Identification: Third antennal segment usually rounded, with a long terminal style. Rs 2- or 3-branched. Anal cell often shorter than 2nd basal cell, rarely absent. R-m cross vein located beyond basal 34 of wing, d* genitalia not folded forward under abdomen.

Members of this large group vary somewhat in appearance and wing venation. Most are small (some minute) and have a stout thorax and a tapering abdomen. Many resemble small muscoids but lack a frontal suture. Empidids are common flies occurring in many different situations; some occur in swarms, flying with an up-and-down or circular movement (hence the common name). Most are predaceous but many occur on flowers. Larvae live in the soil, decaying vegetation, under bark, in decaying wood, and in water.

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