Maculation Pattern in the Subgenus Protesilaus (Lepidoptera: Papilionidae). 1. the Development of Wing Pattern in Papilio agesilaus fortis

Abstract

Analysis of maculation pattern in P. a. fortis (Rothschild & Jordan) at 22°C has shown 2 related but temporarally separated elements in pattern formation. The 1st period, of 5 days duration, results in the development of the scale pattern by 2 successive periods of mitotic divisions of the hypodermis proceeding from the base of the wing to the margin. A pigmentless scale pattern is apparent by Day 6. Addition of tyrosine at this time induces an essentially complete pattern. The 2nd period, of 13 days duration, is concerned with the maturation, pigmentation, and chitinization of the scales. Four pigment fields are described. The 1st field to appear is the white matrix field. The appearance of the white field is followed by the deposition of pigment in red bands and patches (2nd pigment field). The 3rd field to be determined is the yellow or buff marginal spots. Tbe 2nd and 3rd fields are limited to the hindwing. Deposition of brown pigment (4th pigment field) begins by day 13 and proceeds from the base of the wing. Wing development, pigmentation, and chitinization are completed by the 18th day of pupal life.