Agriculture Reference
In-Depth Information
Fig. 96 Wing venation of a scuttle fly - family
Phoridae.
false vein
false margin
Fig. 97 Wing venation of a hover fly - family
Syrphidae.
Fig. 98 Larva of a hover fly,
Syrphus ribesii
- family
Syrphidae (x4).
EXAMPLES:
Milesiinae -
Eumerus
spp. (small
narcissus flies),
Merodon equestris
(large nar-
cissus fly); Syrphidinae -
Scaeva pyrastri
(cab-
bage aphid hover fly predator),
Syrphus ribesii
(currant aphid hover fly predator).
12. Family PHORIDAE (scuttle flies)
(p. 177)
Small, black or brownish-black, hump-backed
flies with a characteristic wing venation, just the
anterior veins being prominent and meeting the
costa well before the wing tip
(Fig.
96). Larvae
are often associated with decaying organic mat-
ter, some feeding on fungi, including cultivated
mushrooms.
EXAMPLE:
Megaselia
spp. (mushroom scuttle
flies).
Series SCHIZOPHORA
Ptilinum present.
Series SCHIZOPHORA -
ACALYPTRATAE
6
Squamae (the calypters) poorly developed and
the transverse suture (which divides the
mesonotum into a prescutum and scutum) (see
later in Fig. 110) poorly developed or absent;
second antennal segment ungrooved.
13. Family SYRPHIDAE (hover flies)
(p. 177
et seq.)
Medium to large, often brightly coloured flies;
includes various bee-like or wasp-like species,
some with the ability to hover; wing venation
characteristic, with a false vein and a false mar-
gin
(Fig.
97). Larvae maggot-like, with distinct,
often cone-like posterior respiratory processes;
body sometimes translucent, exposing the vis-
cera
(Fig.
98). Larvae are of various habits, many
feeding in decaying organic matter; several spe-
cies are important predators of aphids.
14. Family TEPHRITIDAE
(large fruit flies)
(p. 179
et seq.)
Wings noticeably mottled
(Fig.
99); female with
a distinct oviscapt. Larvae with a pair of rounded
6
Some authorities have abandoned the various sub-
divisions
ACALYPTRATAE,
CALYPTRATAE
(p. 50) and PUPIPARA (p. 52).
