XIII. D, 4 Wileman: Japanese Lepidoptera 153 



yellowish white hairs on segments 4 to 7 ; yellow dorsal tubercles 

 on segments 9 to 11; red subdorsal tubercles on segments 2 to 3 

 and 9 to 12; a spiracub.r gray stripe, interrupted by red tuber- 

 cles, emitting hairs; a subspiracular yellowish stripe; a lateral, 

 compact, subspiracular, brushlike tuft of grayish black hairs 

 on segment 6 and of thin fascicles of whitish gray hairs on 

 each segment and anus ; a long tuft of pinkish gray hairs pointing 

 backward on segment 12. The larva was common on wistaria at 

 Kobe in 1901. Matsumura says that it feeds upon the pear and 

 other fruit trees. Matsumura ■' records the life history of this 

 species and gives figures of the male and the normal female 

 imago, the ova, the larva, and the cocoon. He says that — 



The species is double brooded and hibernates in the ova stage. The first 

 brood appears in July and August, the second brood in September and 

 October. 



Sasaki * also describes the life history and gives figures of 

 the male and the normal female imagoes and of the larva. He 

 says that the first brood of the larva appears in May and June 

 and the second brood in August and September. The larva is 

 full-grown by the middle of June and September, and the imago 

 emerges at the end of June and October. He gives as food plants 

 mulberry (kuwa) ; wistaria (fuji) ; dwarf oak, kunugi {Quercus 

 serrata Thunb.) ; o-kuro-umemodoki {Rhamnus japonicus 

 Maxim, var. genuina Maxim.). 



The male flies in the day time like gonostigma Fab. The female does 

 not cover its eggs w^ith hairs from the anal tuft like gonostigma. 



Imago. — Leech ' remarks : 



A fine series, collection Pryer, including four female specimens with 

 well-developed wings, and three examples of the same sex in which the 

 wings are dwarfed, but with the markings reproduced in miniature. 



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 Fryer'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 used with 0. thyellina. 



'Matsumura, Nihon Gaichuhen (1899), 50, PI. 21, figs. 1-5. 

 ■■ Sasaki, Insects Injurious to Japanese Trees [Nihon Jumoku Gaichuhen 

 (Jap.)], 3d ed. (1910), pt. 2, 30, PI. 90. 



■Leech, Proc. Zool. Soc. London (1888), 625. 



