496 



WARO NAKAHARA : 



Sisyra Yamamurœ n. sp. 



Head ochraceous yellow, covered with yellowish hairs ; face 

 yellowish; last joint of maxillary palpi thick and extremely long; 

 antennae with about 50 joints, black, some terminal joints pale yellow ; 

 vertex spotted with fuscous. 



Prothorax ochraceous yellow with fuscous spots and yellowish 

 hairs ; much wider than long. 



Legs pale, with tibia darkened at extremity. 



Abdomen much thickened at apex, darkish yellow ; on both dorsal 

 and ventral sides, most segments show on the hind margin a black 

 spot covered with long hairs. Paired lateral appendage of male rather 

 large, sending out a pair of long and very slender, upwardly directed, 

 claw-like processes ; the slender processes just mentioned not longer 

 than the basal part from which they arise, not crossing each other at 

 their ends. 



Wings hyaline, nearly colorless, with yellowish neuration ; costal 

 cross-veins rather unequally distributed, nine of them in the basal half 

 and only one in the distal half of the space between base and. stigma ; 

 media is dichotomously forked three times in forewing, and twice in 

 hindwing. 



Hindwing nearly perfectly colorless, excepting anterior marginal 

 area and pterostigma which are yellowish. 



Measurements : 



Length of body 4.5 mm. 



,, „ antennae 4 ,, 



„ „ forewing 6 „ 



Width of , ,3 „ 



Length of hind wing 4 



A single male specimen captured by my friend, Mr. S. Yamamura, 

 in the garden of the Prefectural Agricultural Experiment Station of 

 Shiga (Prov. Ohmi) on May 27th, 1912. 



