. Bee flies of the world: the genera of the family Bombyliidae. Bombyliidae; Parasites. Subfamily Systropinae Brauer, 1880 The flies of this subfumily are uniqvie and very beau- tiful. They are remarkable examples of mimicry of sphecoid and \'espoid wasps and the group extends into all the world regions. Most of these flies are parasitic in the larval stages upon moths of the family Eucleidae, but one species from Central Africa has been reared from cocoons of StenomutiUa heroe Pering. The flies of tliis subfamily are unique in several re- spects. They are distinguished by : (1) the long or ve
. Bee flies of the world: the genera of the family Bombyliidae. Bombyliidae; Parasites. Subfamily Systropinae Brauer, 1880 The flies of this subfumily are uniqvie and very beau- tiful. They are remarkable examples of mimicry of sphecoid and \'espoid wasps and the group extends into all the world regions. Most of these flies are parasitic in the larval stages upon moths of the family Eucleidae, but one species from Central Africa has been reared from cocoons of StenomutiUa heroe Pering. The flies of tliis subfamily are unique in several re- spects. They are distinguished by : (1) the long or very long, thin, abdomen, either cylindroid or laterally com- pressed in females, clavate in males, together with the extraordinarily extensive and lengthened and thick- ened metasternuni in Systropus Wiedemann, but ordi- nary in DoUchomyia Wiedemann; (2) the unusually prominent eyes which are often holoptic in both sexes with consequently reduced facial and clypeogenal area; (3) the long, slender, distally flattened, approximate antenna, shorter in some genera, together with the slight but distinctly concave occiput; and (4) the slen- der wing with only 3 posterior cells and reduced axil- lary lobe and alula. There are either 2 or 3 submar- ginal cells. Other characters of the subfamily that may be noted are the slender wings with axillary lobe either nar- rowed or completely wanting so that the wing appears to be almost stalked. There is no special pronotal de- velopment as in the Toxophorinae but the propleural lobes may be quite swollen. The proboscis varies from as long as the head to much longer. These flies appear to be quite bare but are clothed with fine, minute scales, which may be in regular transverse rows upon the legs, or scattered hairs and pollen. The first posterior cell is SYSTROPINAE. Text-Figure 34.—Pattern of the appro-ximate world distribution of the species of the subfamily Please note that these images are extracted from scanned page images
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Keywords: ., bookcentury1900, bookcollectionbiodiversit, booksubjectparasites
