ON THE OSMYLIN/E OF JAPAN. 5O9 



outermost spot being the smallest and the median the largest ; 

 pterostigma yellowish with some thickened black veins on both sides. 



Costal cross-veins mostly simple, only occasionally a few of them 

 are furcate ; sector with nine or ten branches ; two series of gradate 

 veins rather irregular and scarcely parallel. 



Hindwing without prominent marking, excepting yellowish ptero- 

 stigma which is marked with fuscous on both sides. 



Measurements : 



Length of body 10 mm. 



„ „ forewing 18 „ 



Width of „ 6.5 „ 



Length of hindwing 15 „ 



A single male specimen, captured by Mr. H. Okamoto at Sapporo, 

 is in my collection. 



Remark : Osmyhis flavicoruis described and figured by Prof. S. 

 Matsumura in his work entitled " Senchü-zukai " seems to be identical 

 with Navâs' 0. Harmandinus, and so I place doubt on the status of 

 the species recently recorded by the same author^ from Saghalien 

 under the name of flavicornis. 



Spilosniylns nigricornis n. sp. 



Head blackish, swollen above, with long strong hairs ; hind margin 

 of head and mouth-parts fuscous black ; narrowly brown around eye ; 

 antennae black or piceous, somewhat brownish towards tip. 



Prothorax dark yellow, with a narrow median longitudinal line 

 which widens towards both its anterior and posterior ends ; two black 

 spots on each side of the line. Meso- and metathorax blackish ; lobes 

 more or less swollen, shiny black. 



Legs fuscous yellow ; claws rather short, not so strongly curved, 

 testaceous, with a few teeth. 



1) Erster Beitrag zur Insekten-Fauna von Sachalien, Journ. Coll. Agr., Tohoku Imp. 

 Univ., iv, p, 15 (1911). 



