5 .6 



WARO NAKAHARA: 



a boat-like shape. In the male, there exist two slender lobes (which are 

 variable in size and shape, and appear to be slender free sacs of an 

 unknown character) at the base of suranal plate ; besides, there are 

 two pairs of appendages arising from the last abdominal segment. 



Forewing elongate and broad ; neuration mostly black but partly- 

 pale ; subcosta and radius pale yellow ; inner marginal area irregularly 

 clouded with grey, causing pale and dark spaces ; some darkish spots 

 on pterostigma and near apex ; a single darkish spot on disk. 



Nearly all costal cross-veins furcate, and several of those at base 

 are united by a short cross-vein ; radial sector with 12-16 branches ; 

 discal cross-veins numerous and irregular in arrangement ; discal cells 

 hexagonal or quadrate, becoming very much elongate towards outer 

 margin. 



Hindwing hyaline with dark markings on pterostigma ; inner 

 marginal area slightly clouded with pale grey. 

 Measurements : 



Length of body 13 — 15 mm. 



„ „ forewing 26—37 » 



Width of „ 10 — 10.5 „ 



Length of hindwing 23 — 24 „ 



Hab. : Kusakimura, Prov. Harima ; two pairs (J Mr. Iguchi coll. 

 Prov. Wakasa, a single female specimen, Mr. Isaki coll. 

 Prov. Chikugo, Kiushiu, a single male specimen, Mr. 

 Takamuku coll. 

 All the above six specimens are in my collection. 

 Remark : This species is closely allied to O. tessellatus and 0. 

 hyalinatus, but is distinguishable from both these by markings of head 

 and prothorax, structure of coxa I, etc. 



Osmylus hyalinatus MacLachlan. Fig. 8. 

 Osmylus hyalinatus M'Lachlan, Trans. Ent. Soc. Lond., ii, p. 181 

 (1875). 



