Wallace return to England in 1862 after 8 years in the Malay Archpelago, all his stuffs periodically sent home by steamers.
He only described the butterflies after 5 years, so things could get mixed-up.
His type specimen is the only one known in Singapore.
The nearest place in the Malay peninsula where D. singhapura occur is Mt. Ophir about 120 miles north of Singapore, though it probably also occur in the highlands of the Endau-Rompin region (about 80 miles away).
Singapore with the highest point only about 580+ feet is practically low country, as is much of the adjacent southern Johor, probably unsuitable habitat for D. singhapura.
Where D. singhapura have been taken at low levels is in the foothills of the higher ranges, probably along river valleys with their cool microclimates, and where occassional individuals stray from higher altitudes.
Still one never knows, what with Vanessa indica being seen in Singapore.
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