G6 
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— 
40 
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16 
-_ 
SYRPHITD A. 
(11) Wings with a shar} ly-defined, broad black 
pattern; thid and fourth abdominal 
segments each with three prominent bull. 
(8) Body and legs entirely black, even the 
abdominal bulle wholly black; wings 
with the basal half entirely blackened 
and with a single band in addition. 
Third and fourth abdominal segmeuts with 
the middle bulla encircled by a velvety- 
black patch, the lateral bullee bare and 
shining, distinct; sides of the abdomen 
with black hairs ...... oes 2 
) Third and fourth segments on each iste of 
the middle buila with a broad patch of 
golden pubescence, which entirely covers 
the lateral bulla, which are therefore not 
visible ; sides of the last three segments 
with a fringe of golden hairs .......... 
Body and lees mostly red or yellow ; abdo- 
minal Bulle red or yellow ; wings almost 
entirely hyaline at the base, with two 
black bands on the middle. 
Tibize and tarsi black; wines rather dark- 
ened at the base; bulla on the second 
abdominal segment red, black only towards 
the fore border .......... Seto 
Tibia and tarsi red ; wings entirely hyaline 
at the base ; bulla on second sezment 
entirely black... .... CAO Oe ea 
(4) Wings either without any pattern or with 
an ill-defined one in the middle; third 
and fourth segments each with only a 
middle bulla. 
(18) Wines vitreous, without any pubescence 
towards the middle, with a small, more 
or less distinet deal band extending to 
the prefurea; syvamule with a w hitish 
fringe ; second ubdominal segment with a 
broad ‘yellow band ; face without a. dis- 
tinct lateral keel below, with the middle 
tubercle not very prominent and grey- 
Gustiod ses. scapes Pe a eee eos Coe 
(12) Wings broadly pubescent to the subapical 
and postical cross-veins, in the middle 
with a broad brown spot ‘extending to the 
middle cross-vein ; squamuize ‘vith a dark 
fringe; face below with an oblique pro- 
Enea keel on each side and with the 
tubercle bare, black, very shining ...... 
(3) Avista bare; abdominal bulle but little 
prominent, indistinct; thorax on the back 
with dark and grey transverse bands; 
wings hyaline, unspotted ..........03 
Abdomen without distinct bulle. 
(19) Thorax and abdomen with bright yellow 
transverse bands ; hind femora half yellow 
and half black. 
bullatu, Loew. 
aurigerd, Sp. 1, 
kroevert, sp. 0. 
neavel, Sp. 0 
bulligera, Aust. 
pubipennis, sp. u. 
erratica, Bezzi. 
