ON THE OSMYLIN^E OF JAPAN. 



497 



Remark : This species closely resembles 5. Indica, which Need- 

 ham 15 described from India, but differs from it distinctly in the 

 structure of the male genital appendage. 



Tribe Berothini Banks. 



Trans. Amer. Ent. Soc, xxxix, p. 211 (1913). 



Under this tribe Banks has placed three genera, viz., Lomamyia, 

 Isoscelipteron and Berotha. 



Genus Herotha Walker. 



Berotha Walker, Trans. Ent. Soc. Lond., v. N.S., pt. v, p. 186 

 (i860); Needham, N.Y.S. Mus., Bull. 86, p. 16 (1905); Banks, 

 Trans. Amer. Ent. Soc, xxxix, p. 212 (191 3). 



This genus differs from Lomamyia in the radial sector being not 

 connected with media. 



Banks separated Isoscelipteron from Berotha on account of the 

 former having eight, instead of four or five, branches to radial sector ; 

 however, since some species, as f.i. Berotha rufa and B. nicobarica 

 described by Navas, 2) show seven branches, and since moreover the 

 number of the branches is subject to variation among individuals of 

 one and the same species, I will not give Isoscelipteron more than 

 subgeneric status unless stronger grounds for its generic separation be 

 forthcoming. 



Subgenus Isoscelipteron Costa. 



Isoscelipteron Costa, Fauna del Regno di Napoli (1860-70) ; Banks, 

 Trans. Amer. Ent. Soc, xxxix, p. 212 (191 3). 



1) Notes on the Neuroptera in the collection of the Indian Museum. Ree. Ind. Mus., 

 iii, pt. iii, No. 12, p. 206-07, pi- xx >> fig- i ( I 9°9)- 



2) Crisôpidos y Hemerôbidos (Ins. Neur.) nuevos ò criticos. Brotéria, x, Serie Zoologica, 

 fase, ii, p. 108-09 ( l 9 12 )- 



3) This work was unfortunately not accessible to me. 



