The wingspan is 140–150 millimetres (5.5–5.9 in).The sexes very different. Male black as in Papilio aegeus, forewing with macular band from
the costal to the hindmargin, or with subapical band and a patch placed before the hindmargin. The white band of the hindwing formed as in P. aegeus, i. e. the 1. patch prolonged basad; beneath the hindwing
round the cell, which are distally rounded and all closely approximated to it, the 1. spot sometimes indistinct or obsolete. Larva very similar to that of P. aegeus, green, with irregular, short light longitudinal
streaks, black head, black legs and above them a broad black longitudinal stripe, from which 4 bands emanate, on the 4., 7., 9: and last segments; the spines as in P. aegeus; on Citrus, in the forest. Pupa as in
P. aegeus, in proportion to its size somewhat more slender. The butterfly in woods, where it is not easy to catch on account of the thick undergrowth and its swift flight. Appears to occur on all the islands of the Solomon Group.Karl Jordan in Seitz.See this work for the forms.[2]
Papilio bridgei depicted on a 5 January 1982 Solomon Islands postage stamp (SLB914: 25c).
Etymology
Named for "Captain Cyprian A. G. Bridge who commanded H.M. ship Espiègle during her long and interesting Commission of nearly four years, a greater portion of which time was spent among the islands of the Western Pacific."
^Seitz, A. Band 9: Abt. 2, Die exotischen Großschmetterlinge, Die indo-australischen Tagfalter, 1927, 1197 Seiten 177 Tafeln pdf This article incorporates text from this source, which is in the public domain.
