166 The Philippine Journal of Science i9i8 



Form 2. — Laterally purplish gray; length, 66 millimeters 

 (Plate II, figs. 6 to 9). This larva was taken at Hakodate, 

 Oshima Province, Hokkaido (Yezo), in June (figured June 21), 

 1902, on bamboo grass, Japanese name, sasa-kusa (? Lopha- 

 therum datum ZolL). It pupated on July 4, and a male imago 

 of albomaculata Bremer emerged on August 3, 1902. One male 

 and two females were also bred from larvae compared with 

 this figure (Plate II, fig. 6) . The male of these three specimens 

 emerged on August 11, and the two females on July 31 and 

 August 6, 1902, respectively. In the male the upper spot of the 

 forewing is almost obsolete, being a mere dot (much smaller 

 than in Bremer's figure) ; otherwise these three specimens agree 

 well with his figures of the male and the female. The larva 

 with the purplish gray sides is the commonest form met with, 

 and I have frequently bred albomaculata from it. 



Form 3. — Dark form; length, 71 millimeters (Plate II, figs. 

 10 to 12). This larva was taken at Hakodate in August 

 (figured August 11), 1902, also on bamboo grass like the larva 

 of form 2. It died before pupation, so that no imago was bred. 

 This form (fig. 10) is nearer than forms 1 and 2 (Plate II, figs. 

 4 and 6) to the very dark larva of potatorixi Linn., which is 

 figured by me (Plate II, fig. 1). 



Pupa. — The pupa is inclosed in a fusiform yellow cocoon of 

 leathery texture, which is attached firmly to the stems of sasa 

 (bamboo grass), kaya (reed grass), or various other grasses. 

 The cocoon is smaller than that of C. potatoria, which is dirty 

 whitish brown. Both the larva and the cocoon of albomaculata 

 urticate to a slight extent. 



Some controversy arose between Leech -'" and Staudinger " 

 as to whether albomaculata should be considered a separate 

 species distinct from potatoria Linn. Leech included alboma- 

 culata as a synonym of potatoria; while Staudinger maintained 

 that it was a distinct species, some of his proofs being based 

 upon the difference between the larvse of the two species. 



As will be seen by a comparison of the figures of the larva of 

 C. potatoria Linn, and the larva of C. albomaculata Brem., forms 

 1, 2 and 3, there is a considerable difference between the larvse 

 of the two species, and I am inclined to indorse Staudinger's 

 opinion as to the claim of albomaculata to specific rank. 



•"Leech, Trans. Ent. Soc. London (1899), 113. 

 ''Staudinger, Rom. Mem. Lep. (1892), 6, 317. 



