620 mr. j. h. leech on the [dcc. 18, 



193. Spilarctia imparilis. 



Spilarctia imparilis, Butl. c?, Ann. & Mag. Nat. Hist. (4) xx. 

 p. 394 (1877) ; 111. Typ. Lep. Het. ii. p. 4, pi. xxii. fig. 4 (1878) ; 

 5 , Ann. & Mag. Nat. Hist. (5) iv, p. 351 (1879). 



Several examples, coll. Pryer. 



The markings of the male are fairly constant, but the maculation 

 of the female is subject to considerable modification, and in some 

 examples of this sex almost entirely absent. 



Yokohama (Jonas) ; Yesso {Pryer) ; Hakone {Smith). 



194. Seriarctia lewisii. 



Seriarctia lewisii, Butl. Cist. Eat. vol. iii. p. 115 (1885) 

 Eight specimens, coll. Pryer. 



The marking of primaries is very constant, but on the secondaries 

 the maculation is subject to variation. 

 Nikko, Oiwake {Pryer). 



195. Aloa lactinea. 



Phalcena lactinea. Cram. Pap. Exot. ii. p. 58, pi. 133. fig. D. 



Bombyx sanguinolenta, Fabr. Ent. Syst. iii. 1, p. 473. 206. 



Estiymene lactinea, Hiibu. Verz. Schmett. p. 184. 1894. 



Aloa lactinea. Walk. Cat. Lep. Het. iii. p. 702. 



Nine specimens, coll. Pryer. 



Varies considerably, the number of black spots ranging from but 

 a slight trace of a single spot to five distinct large spots. 



Yokohama {Pryer, Mauley) ; North China, North India, Nepaul, 

 Ceylon, East Indies, Australia. 



196. DlONYCHOPITJS NIVEUS. 



Dionychopius niveus, Men, Bull. Phys. Petersb. iii. p. 108; 

 Bull, de I'Acad. t. xvii. p. 218 ; Schr. Amur Reisen, p. 52, tab. iv. 



Varies in the intensity of red lateral spots on abdomen. Normally 

 the female has six of these spots and the male five, but a male from 

 Gensan has only two distinct, and three faint red spots on side of 

 body. The usual dorsal series of black spots may also be absent. 

 There is further some modification in the character of the discal spot 

 on secondaries ; in some specimens this is conspicuous, whilst in 

 others it is scarcely discernible. 



Oiwake, Yokohama {Pryer) ; Hakodate, Seudai, Hakone, and 

 Geusan {Leach) ; Amur. 



197. Bireta plumosa, sp. n. (Plate XXXI. fig. 4.) 



cj . Primaries yellowish buif, darker along the inner margin, 

 clouded about the disk and towards the apex with purplish brown. 

 Secondaries silky white with a faint yellowish tinge. Thorax and 

 abdomen buiF; antennae plumose. Underside uniform yellowish 

 white, silky. 



