THANAOS. 



581 



T. ni.sllc raus, Butler. — " Ahc anticoD supra basi ciiierco-fusca3, lunula nigra apud basim cella 

 inclusa, fascia media extus oclirco-pallido intus olivaceo-fusca lincis nigris marginata et 

 divisa, area apieali ciiierco-fusca I'asciis olivaceo-fuscis varicgata, linea submarginali luuulata 

 pallida ; posticte nigro-fuscse, macula media oblonga brevi ochrea macularumque seriebus 

 duabus submarginalium. Corpus nigro-fuscura. 



" Alas antica) subtus basi fuscescentes, fasciis duabus fuscis obsoletis post cellam positis et apud 

 marginem interiorem conjunctis, margine postico linca fusca lunulata submarginato ; posticae 

 velut supra. Corpus fuscum. 



" Alar. cxp. unc. 1^^^." {Butler, I. c.) 



Pryer states that the larva feeds upon oak. 



Common in most parts of Japan in May. I also took it at Niugpo in 

 April, and Pratt met with it at Ichang, Central China. It is fairly plentiful 

 in Amurland and Fixsen records it from Corea. 



The only localities in Western China from which I have received 

 specimens are Wa-ssu-kow and Ta-chien-lu, where it occurs in May and 

 June. The specimens from these places are smaller and darker than the 

 type, and the inner edge of the central band of primaries is not indented ; 

 the yellow spots on secondaries are smaller, not always well defined, and in 

 one specimen almost entirely obscured by the dark ground-colour. This 

 form may be known as var. nigrescens (Plate XLII. fig. 2, ). 



Thanaos pelias. (Plate XLII. fig. 3, ^ .) 



Nisoniades pelids, Leech, Entomologist, xxiv., Suppl. p. 60 (June 1891). 

 Nisoniades erebus, Grum-Grshimailo, Horae Soc. Ent. Ross. xxv. p. 461 (1891). 



Primaries grey, tlie basal half thickly, and the outer half sparingly, spriukled witli blackish ; 

 there are three transverse black lines, the first is not well defined, the second is slightly 

 curved and indented, and the third is serrated ; the space between the second and third lines 

 appears to be darker, and there is a white spot on the costa. Secondaries fuliginous, with 

 faint indications of a pale transverse line beyond the centre of the wing. Under surface 

 fuliginous.; the primaries have a short white macular band from the costa, and the apices 

 are tinged with grey ; transverse band on secondaries indicated as above. Fringes dark 

 grey, paler towards extremities. 



Expanse, c? 36 millim., 5 40 millim. 



Agrees with T. Twoir^oy/, Boisd., in size and in the abbreviated band on 

 the under surface of primaries, but on the upper surface the markings are 

 not very dissimilar to those of T. tages, L. 



Var. erebus, Grum-Grshimailo. " Supra alis anticis cinereo-griseis, basin versus obscurioribus et 

 fusco mixtis, litura marginali cinerea, ad discum obscurius adumtirata, duabus fasciis trans- 

 versis obscure griscis, nigro serrato-marginatis ; posticis nigro-fuscis. 



4 II 



