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B. haemorrhoidalis worker visiting Pteracanthus. |
Orientalibombus
ecology
and behaviour
HABITAT:
Forest at relatively low altitudes.
FOOD-PLANTS: Long
tongue-length bumblebees visiting deep flowers.
NESTING
BEHAVIOUR:
Nests undescribed, but likely to be pocket-makers.
MATE-SEARCHING
BEHAVIOUR:
Males patrol circuits of scent marks.
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Subgenus
ORIENTALIBOMBUS Richards
Bombus (Orientalibombus) Richards, 1929c:378,
type-species Bombus orientalis Smith (= Bombus
haemorrhoidalis Smith) by original designation
Bombus (Orientalobombus) Kruseman, 1952:102,
unjustified emendation
Bombus
(Or.) funerarius Smith
funerarius Smith, 1852b:47,
examined
priscus (Frison, 1935:349
[Bremus])
birmanus (Tkalcu, 1989:47
[Orientalibombus]) examined
4 names
MORPHOLOGY:
photos of male genitalia.
DISTRIBUTION:
Oriental Region.
Bombus
(Or.) braccatus Friese
braccatus Friese, 1905:512,
examined
metcalfi (Frison, 1935:357
[Bremus]) examined
2 names
MORPHOLOGY:
photos of male genitalia.
DISTRIBUTION:
Oriental Region.
Bombus
(Or.) haemorrhoidalis Smith
hæmorrhoidalis [haemorrhoidalis]
Smith, 1852a:43
orientalis Smith, 1854:402,
examined
assamensis Bingham, 1897:550,
examined
montivolans Richards, 1929c:382,
examined
semialbopleuralis (Tkalcu, 1974b:322
[Orientalibombus])
cinnameus (Tkalcu, 1989:47
[Orientalibombus]) examined
16 names
TAXONOMIC
STATUS: Several of these nominal taxa have been
treated as separate species, most recently in the case
of B. montivolans [Burma to southern China] (e.g.
Tkalcu, 1968b, 1989).
However, aside from differences in colour pattern, they
are all closely similar in morphology with a range of
variation (Williams, 1991
[pdf]). Until more evidence to the contrary is available
from critical studies of patterns of variation, I shall
treat them as parts of a single variable species.
MORPHOLOGY:
photos of male
genitalia.
DISTRIBUTION:
Oriental Region.
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