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Show 626 MR. J. H. LEECH ON THE [Dec. 18, pale whity brown; primaries with discal and apical spots as above there are also two small brownish spots at outer angle; on secondaries are a discal spot and a linear dash near anal angle brownish. Expanse 44-48 millim. (Plate X X X I . figs. 7, 7a.) Although very different in coloration, the markings of the female are exactly of the same character as those of the male. In reference to the females with ill-developed wings it should be said that these organs are very similar in appearance to the wings of a moth on its first emerging from the pupa and gives one the idea of arrested development. Instances of this nature are not unknown to the breeder of Lepidoptera, although the cause is not understood. There is nothing to show whether Pryer's specimens of this species were captured or bred ; but as the semiapterous form is nearer to typical female Orgyia we may reasonably suppose that such forms as that figured are usual with O. thyellina. Tokio (Fenton); Yokohama, Oiwake (Pryer). 219. ORGYIA GONOSTIGMA. Bombyx gonostigma, Fabr. Syst. Ent. p. 585 (1775); Hiibn. Bomb. pl. xx. fig. 78. Orgyia approximans, Butl. Trans. Ent. Soc. 1881, p. 10. One example in Pryer's collection from Oiwake. The tone of colour and number of white apical spots are such variable characters in 0. gonostigma that it is certainly an unnecessary addition to synonymy to endeavour to establish a species on such slight differences as those upon which Mr. Butler has relied in his differentiation of O. approximans. Oiwake (Pryer). 220. PRISMOSTICTA HYALINATA. Prismosticla hyalinata, Butl. Cist. Ent. vol. iii. p. 125. This is no. 163 of Pryer's Catalogue, and tbere were several specimens in his collection chiefly from Oiwake. Oiwake, Nikko (Pryer). 221. BOMBYX MORI. Phalama mori, Linn. Syst. Nat. ii. p. 817. 33 (1767). Several specimens, coll. Pryer. Yokohama (Pryer). 222. BOMBYX MANDARINUS. Theophila mandarina, Moore, Proc. Zool. Soc. 18/2, p. 576, pl. xxxiii. fig. 5. A fine series in coll. Pryer. I took two males at Gensan in July. This species is probably the wild form of the silkworm of commerce, B. mori. It is much darker in colour and has very distinct markings • the female is much larger than the same sex of B. mori. Compared with that of the cultivated silkworm the cocoon of B. mandarinus is very flimsy. Yokohama (Pryer) ; Hakodate (Andrews) ; Gensan (Leech). |
