510 



WARO NAKAIIARA : 



Abdomen blackish, with pale hairs ; boat-shaped female organ 

 black, with a yellow transverse band. 



Forewing broad, vitreous, with black neuratiori, subacute at apex ; 

 subcosta and radius yellowish with several short black spaces ; ptero- 

 stigma yellowish, marked with two large black spots ; a black spot 

 exists in a middle cubital cell ; several small spot present near base 

 of the wing. 



Costal cross-veins mostly simple, though usually a few of them 

 are furcate; sector with S-u branches; series of gradate veins some- 

 what irregular. 



Hindwing without marking except on pterostigma which is similarly 

 marked as that of forewing. 

 Measurements : 



Length of body 9 — 12 mm. 



„ forewing 15 — 19 „ 



Width of „ 5.5— 7 ,, 



Length of hindwing 13.5 — 17 ,, 



Nine female specimens and a single male specimen captured by 

 the author on the shore of Lake Oze, Prov. Közuke, on Aug. 1, 191 3. 



Genus Osmylus Latreille. 



Osmylus Latreille ; Walker, Cat. Neuropt. Brit. Mus., ii, p. 231 

 (1852); Banks, Trans. Amer. Ent. Soc, xxxix, p. 212 and 

 215 (1913) ; Krüger, Stett. Ent. Zeit, p. 38 (1913). 



Osmylina Schneider, Monog. Chrysop., p. 36 (185 1). 



Hyposmylus MacLachlan, Ent. Month. Mag., vi, p. 200 (1870) ; 

 Krüger, I.e., p. 48. 



Parosmylus Needham, Ree. Ind. Mus., iii, p. 309 (1909). 



Dictyosmyhis Navâs, Ann. de la Soc. Scient. Brüx., p. 189 (1910) ; 

 Krüger, I.e., p. 49. 



Plethosmyhis Krüger, I.e., p. 43. 



I agree with Banks in regarding Hyposmylus, Parosmylus and 



