JAPANESE DEAGONFLIES OF THE FAMILY CALOPTERYGIDAE. 161 



Rhynocypha ogasawarensis Matsumuea. sp. nov. 



(Tcxtfi.ix. 4) ' ■ 



Longth of tho iibdomou -3^20-21.5111111. 2 18-lOmm. 



Loiiixlh (.f tlio liind win^^ -^ 24-20111111. 2 25inrn. 



Lc'n<>:th of the plorcstignia ^ 2.5mm-3mm. 2.4iiiin. 



Head : glossy black, the anterior side of the basal joint of the antciuia, 

 a large spot below it and the sides of the labrinn straw yellow; on the 

 vertex with a pair of oblong yellowish spots between the ocelli and the eyes, 

 and another pair of small spots in similar color very close to eyes. 



Male. Thorax: l)la<'k, with <w<. narrow yellowish streaks at the sides, 

 stretching along the iirst and the third lateral sutnres, a small similarly 



very apical part scarcely colon <1; the hind wings also liyaline ; but being 



