The results of experimental hybridization are congruent with data known for other subspecies of these swallowtails (Ae, 1962, 1979; Clarke, Sheppard, 1962). Appearance of the hybrids and their parents is given in Fig. 1.

a

b

c

d

e

Fig. 1. Imago (males) of three swallowtail species and their hybrids (topper row, upperside view; lower row, bottom view):
         a, Sinoprinceps xuthus xuthus; b, S. x. xuthus E ´ Achillides maackii maackii G;c, A. m. maackii ;
         d, Papilio machaon amurensis E ´ A. m. maackii G;e, P. m. amurensis.        
         

     Hybridization of these species is under Haldane's rule as all the hybrid specimens (F₁ ) were males. Number of crosses performed and quantity of hybrids obtained are shown in Table 1.

Ae S. A. (1962) The hybrids between Papilio hippocrates female and P. maackii and other Papilio males in Japan. Entomologist. Vol. 95. P. 277-284.

Ae S.A. (1979) The phylogeny of some Papilio species based on interspecific hybridization data. Systematic Entomology. Vol. 4. P. 1-16.