SPONGILLA-FLIES — PARFIN AND GURNEY 519 



Sc appearing separate from Rl or atrophying and indistinct at apex; 

 Rs+MA separating off from Rl near base, Rs separating off at about 

 the longitudinal midpoint of wing, R2 and R3 a short distance beyond; 

 MA forking basad of level of point of junction of Sc and Rl; MP 

 forking into MPl + 2 and MP3+4 with terminal forks basad 

 of level of point of junction of Sc and Rl; Cul separating from Cu2 

 near base of wing; three radial cross-veins between Rl and Rs, 1st r 

 distad of forking of Rs from MA, 2d r distad of r-m; 3d r under ptero- 

 stigma; r-m sometimes near point of separation of R4+5 from Rs; 

 one medial cross-vein between MA and MPl + 2 near forking of 

 MPl+2 from MP3-f-4; three mediocubital cross-veins between MP 

 and Cul, the first basal, the second to Cul before branches, and third 

 to branches; one cubital cross-vein; one basal cubito-anal cross-vein 

 between Cu2 and 1st A; one anal cross-vein between 1st and 2d A; 

 no real gradates; thyridia at point of separation of MPl + 2 from 

 MP3+4. 



HiNDWiNo (pi. 1, fig. 8): Costal area with at least six costal cross- 

 veins basad of pterostigma, closer together basally; Sc with terminal 

 end atrophied; Rs probably similar to Sisyra, separating from MA 

 near midpoint of wing; MP forking into MPl-|-2 and MP3+4 as in 

 Sisyra; one medial cross-vein between MA and MPl + 2; one medio- 

 cubital cross-vein; no real gradates. 



A female sisyrid from Wakamatsu, Japan (Aug. 22, 1949, M. 

 Kohno), kindly sent by Mrs. Gloyd and Dr. H. H. Ross (of INHS) 

 appears to closely approach Sisyrella japonica (Nakahara), which 

 Nakahara placed in the genus Sis7jra (1914, pp. 492-493). Sc is 

 atrophied at the apex in the forewing. Two features which were 

 noted upon examination of the specimen but not mentioned in descrip- 

 tions of Sisyrella or its species are the emarginate appearance of the 

 clypeus anteriorly, and the considerably emarginate second abdominal 

 sternite laterally and posteriorly, with the streak almost on the pos- 

 terior margin. The length of the forewing is 5.5 mm., width 2.3 mm.; 

 length of hindwing, 4.6 mm., width 2 mm. The membrane is light 

 brownish. 



According to the descriptions and figures of Nav^s, the chief distinc- 

 tion between Sisyrella and Sisyra seems to rest upon the more apparent 

 separation of Sc and Rl at the apex. The separation of Sc and Rl also 

 seems to occur in Sisyra minuta, and appears occasionally in certain 

 specimens of Sisyra. It has not been possible to procure the genotype 

 of nikkoana for study, and until further investigation reveals stronger 

 characters, Sisyrella should be considered a doubtful genus, scarcely 

 distinct from Sisyra. 



There have been two species ascribed to this genus, both from Japan: 

 japonica Nakahara (1914, p. 493) from Osaka and nikkoana Navas 

 (1911, p. 398) from near Tokyo. 



