1888.] LEPIDOPTERA OF JAPAN AND COREA. 581 



describe as new to science, 20 are from Mr. Fryer's collection and 

 the remaining 18 were discovered by myself during the summer of 

 1886. Considering that in a single season I succeeded in taking 

 80 per cent, of the species of the groups referred to in this paper as 

 occurring in Japan, but that, although collecting for the greater part 

 of the time in localities never before visited by an entomologist, I only 

 succeeded in capturing 18 new species, we may conclude that the 

 Lepidopterous fauna of Japan is fairly well known. It is satisfactory 

 to note that of the 3.52 species included in this paper over 200 were 

 described in this country, principally by Mr. Butler, Mr. Moore, and 

 Mr. Walker ; many, however, as will be seen from the synonymy, 

 have been subsequently redescribed on the continent from specimens 

 received from N.E. Asia, by entomologists unacquainted with the 

 types in our National Collection. 



1. Cephonodes hylas. 



Sphinx hy las, Linn. Mant. i. p. 539. 



Sphinx picus. Cram. Pap. Exot. ii. p. 83, pi. 148. fig. B. 



Sesia hylas, Fabr. Ent. Syst. iii. 1, p. 379. 3; Walk. Cat. Lep. 

 Het, viii. p. 84. 



Cephonodes hylas, Hiibn. Verz. Schmett. p. 131. 1402. 



Hemaris hylas, Saalm. Lep. Madag. i, p. 117, pi. 3. fig. 40. 



Several specimens from Satsuma in May and Nagasaki in May 

 and June, and there were six examples in Fryer's collection. 



Satsuma and Nagasaki {Leech) ; Yokohama (Pryer) ; and generally 

 distributed throughout the warmer portions of the Old World. 



2. Hemaris radians. 



Sesia radians. Walk. Cat. Lep. Het. viii. p. 84 (1856). 



Hemaris radians, Butl. 111. Typ. Lep. Het. pt. ii. p. 1, pi. xxi. 

 tig. 2(1878). 



Hemaris mandarina, Butl. Froc. Zool. Soc. 18/5, p. 239. 



The fuscous band on the outer margin of the primaries is variable as 

 regards width, and the radiations emanating therefrom towards centre 

 of wing are often conspicuous, but in some examples these are entirely 

 absent. These latter agree exactly with description and figure of 

 H. mandarina, Butl., from Shanghai. Appears to be the Oriental 

 representative of i7. bomhyliformis as H. alternata is oi H.fueiformis. 



Yokohama {Jonas and Fryer) ; Oiwake {Fryer); Nagasaki, Fushiki, 

 Geiisan {Leech) ; Shanghai {Fortune) ; Kiukiang {Fratt) ; Corea 

 {Serz). 



3. Hemaris alternata. 



Sesia alternata, Butl. Ann. & Mag. Nat. Hist. (4) xiv. p, 366 

 (1874). 



Hemaris alternata, Butl. 111. Typ. Lep. Het. pt. ii. p. 1, pi. xxi. 

 fig. 2(1878). 



The inward radiation is sometimes so pronounced as to give an 

 appearance of opacity to the disk of the wing. 



