ON THE OSMYLIN/E OF JAPAN. 



507 



Yoshino, Prov. Yamato, Mr. A. Nohira coll. 



Tokyo, Mr. A. Nohira coll. 

 Remarks : Osmylivs, faurinus Navâs seems to me to be a varia- 

 tional form of this species, since the latter is very variable even in 

 the markings of prothorax which usually form a well fixed specific 

 character. Wing markings are especially variable ; my Sapporo speci- 

 men has the markings considerably restricted, while in the Matsuyama 

 specimen, they are strongly pronounced even on hindwing. 



Spilosmylus iminaculatus n. sp. 



Head yellow, with a black triangular spot on top, swollen and 

 blackish behind, blackish also around eye ; face, clypeus and palpi 

 yellowish. Antennae long, dark yellow, with concolorous hairs ; all 

 the joints, excepting the basal one, are nearly equal in length. 



Prothorax yellow with an M-shaped blackish mark and a broad 

 median blackish line above. Meso- and metathorax brownish all over. 



Legs pale yellow, suffused with darkish at end of tarsi ; claws 

 with teeth, strongly curved. 



Abdomen fuscous with a few hairs, spotted with orange yellow, 

 especially on ventral side and at apex ; boat-shaped female organ 

 yellowish, unusually small. 



Forewing broad, subacute at apex, vitreous ; neuration mostly 

 pale, but partly slightly greyish ; without spot except on pterostigma 

 which is very slightly darkish on both sides. 



Nearly all costal cross-veins simple, but the two or three near 

 base of wing are furcate ; radial sector with about ten branches. 



Hindwing almost without marking ; pterostigma mostly faintly 

 marked with grey. 



Measurements : 



Length of body 12 mm. 



„ forewing 19 „ 



