152 The Philippine Journal of Science leis 



in colour and varies in expanse from 38 mm. to 42 mm. I have never 

 taken a female. 



Local distribution. Hondo (Honshu). 



Habitat. Japan. 



Collection number, 217. 



Genus ORGYIA Ochsenheimer 

 Orgyia Ochisenheimer, Schmett. Fur. (1810), 3, 208. 



Orgyia thyellina Butler. 



Plate I, fig. 3, larva, dorsal viewr; fig. 4, food plant; fig. 5, larva, lateral 

 view. 



Japanese names: Himeshiromon-dokuga, himetsuno-kemushiga, kotsu- 

 no-kemush i, kenaga-kemushi-chd. 



Orgyia thyellina BuTLER, Trans. Ent. Soc. London (1881), 10, d"; 

 Leech, Proc. Zool. Soc. London (1888), 625, No. 218, PI. 31, figs. 7, 

 7a, $ (normal and semiapterous forms) ; Trans. Ent. Soc. London 

 (1899), 118, No. 410; Matsumura, Japanese Injurious Insects [Nihon 

 Gaichuhen (Jap.)] (1899), 49, PI. 21, fig. 1, imago, d"; fig. 2, ?; fig. 3, 

 ova; fig. 4, larva; fig. 5, cocoon; Swinhoe, Trans. Ent. Soc. London 

 (1903), 459; Sasaki, Insects Injurious to Japanese Trees [Nihon 

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

 c?, $, and larva; Insects Injurious to Fruit Trees [Kwaju Gaichiihen 

 (Jap.)], 5th ed. (1911), 66, 124, PI. 33, larva, imago; Matsumura, 

 Cat. Insect. Jap. (1905), 1, 40, No. 328; Thousand Insects of Japan 

 [Nihon Senchii Dzukai (Jap.)] (1909), suppl. 1, 66, No. 112, PI. 

 10, fig. 21, c?; Strand, Seitz's Macrolep. Faun. Pal. (1910), 2, 

 119, PI. 226, d"; PI. 19c, $ (normal and semiapterous forms). 



Notolophus thyellinus Kirby, Cat. Lep. (1892), 495. 



The larva figured (Plate I, figs. 3 and 5) was taken in July 

 (fignred July 11), 1901, at Kobe, Settsu Province, Honshu, on 

 wistaria, Japanese name fuji (Kraunhia florihunda Willd.). 

 This larva died, and no imago was bred from it. I bred speci- 

 mens from other larvse compared with my original figure as 

 follows: Two males at Kobe, May 31 and June 16, 1899; two 

 females with normal wings, June 6, 1899, and July 15, 1901 ; one 

 male, Hakodate, Hokkaido, September 20, 1902. My collector 

 also captured semiapterous females on the cocoon, but I have 

 never bred them from the larva. 



The following description is taken from my original figure of 

 the larva : 



Larva. — Length, 37 millimeters. Yellow with grayish white 

 lateral hairs; head gray; collar of segment 2 coral red; on each 

 side of head is a long hornlike tuft of grayish black hairs, 

 pointing forv/ard ; medial dorsal line grayish black, more or less 

 attenuated on segments 2 and 3, broad on segments 4 to 8, and 

 gradually tapering to segment 12; dorsal brushlike tussocks of 



