5i8 



WARO N AK AH AR A: 



Measurements : 



Length of body 



12 — 15 mm 

 21 — 26 „ 

 8—10 „ 

 18 — 22 „ 



„ „ fore wing 

 Width of 



Length of hindwing 



Hab. : Of this species, a large number of specimens were received 

 by me from the following localities : 



Sapporo, Hokkaido, Mr. H. Okamoto coll. 

 Kamiköchi, Prov. Shinano, Mr. S. Kawai coll. 

 Mt. Ibuki, Prov. Ömi, Mr. S. Yamamura coll. 

 Prov. Wakasa, Mr. I. Isaki coll. 

 Prov. Harima, Mr. S. Iguchi coll. 



Matsuyama, Prov. Iyo, Messrs. T. Nagai & Takahashi coll. 

 Kyoto, and Tottori, Prov. Inaba, Mr. A. Nohira coll. 



Further, a series of specimens from various localities on the main 

 island of Japan is contained in the collection of the Imperial Agricul- 

 tural Experiment Station, Tokyo. They were kindly shown me by 

 Dr. T. Miyake. 



Remark : So far as the wing-markings go, this species is very 

 near to O. decoratus. 



The prothorax in the Kamiköchi specimens shows a coloration 

 variegated with deep black, on which account I have at first doubted 

 if those specimens did not represent a species distinct from O. hyalinatus. 



P. S. While this paper was under press, I have received Mr. 

 Okamoto's paper "Zwei neue Arten der japanischen Osmyliden," Ent. 

 Mitt., Band iii, Nr. 1, Jan. '14. To my regret, I can not accept the 

 two species described by him as new under the names of Osmylus 

 [Lysmus) japonicus and 0. (L.) nipponensis. In my view they are 

 identical with Spilosmylus tuberculahis (Walker) and S. nikkocnsis 

 (Navâs) respectively. 



