from China, Japan, and Corea. 77 



Genus HYDRELIA. 

 (Hiibn. ; Hampson, Fauna Brit. Ind., Moths, iii. p. 412 (1895).) 



Hydrelia sylvata. 



Geometra sylvata, Hiibn. Geom. fig. 231. 



Phalcena testaceata, Donov. Brit. Ins. xiv. pi. cccclxxxvii. fig. 1 (1810). 



Hydrelia sylvata, Hiibn. Verz. Schmett. p. 322. 



Asthena sylvata, Guen. Phal. i. p. 437. 



Euchczca sylvata, Meyrick, Trans. Ent. Soc. Lond. 1892, p. 74. 



Three specimens from Oiwake and two from Yokohama in 

 Fryer's collection. 



"Distribution. Europe ; Amur ; Japan. 



Hydrelia plenaria, sp. n. 



Whitish grey. Primaries have a darker greyish band 

 beyond the middle, transversely intersected by an interrupted 

 line of the ground-colour, followed by a double greyish wavy 

 line. Secondaries have six wavy greyish lines, but those on 

 basal half are less distinct than those on outer half. Fringes 

 greyish, preceded by an interrupted blackish line. Under 

 surface whitish; primaries suffused with fuscous; all the 

 wings have two dusky, wavy, transverse lines. 



Expanse 21 millim. 



Two male specimens from Chang-yang : June and August. 



Hob. Central China. 



Hydrelia phasma. 



Emmelesia phasma, Butl. Ann. & Mag. Nat. Hist. (5) iv. p. 441 (1879). 

 Acidalia latsaria, Oberth. Etud. d'Entom. xviii. p. 32, pi. iii. fig. 35 



(1893). 

 Hydrelia pliasma, Hampson, Fauna Brit. Ind., Moths, iii. p. 412 (1895). 



I took the species at Hakodate in August, and my native 

 collector obtained it at Gensan in August and also in the 

 island of Kiushiu. Eight specimens from Gifu, one from 

 Yokohama, and one from Oiwake in Fryer's collection. 

 Obevthiir records the species from Ta-chien-lu. 



Distribution. Japan; Yesso; Kiushiu; Western China; 

 Corea. 



Hydrelia nisaria. 



Acidalia nisaria, Christ. Bull. Mosc. Iv. 2, p. 49 (1881). 

 A fine series in Fryer's collection. The specimens are 

 from Yokohama, Oiwake, and Gifu. I obtained the species 

 at Gensan in July and at Hakodate in August. 

 Distribution. Amur; Japan; Yesso; Corea. 



