8 PROCEEDINGS OF THE NATIONAL MUSEUM vol.68 



Basal segment of the flagellum largely yellow, the tip darkened. 

 Legs yellow, the tips of the tibiae and the tarsi infuscated. Wings 

 with Rs short and strongly arcuated at origin; i? 2+, longer; cell jBj 

 correspondingly shorter, the distal section of vein R^ sinuous; cell 

 J/i nearly sessile; basal deflection of Cu^ at two-fifths the length 

 of the cell 1st i/, and less than its length beyond the fork of M; 

 cell 2nd A broader. Wings conspicuously broader than in the typical 

 form. 



Described from a female, collected at Okeanskaja, Siberia, July 

 1923 (T. D. A. Cockerell). 



Tijpe.— Female, Cat. No. 28360, U.S.N.M. 



Genus LIMNOPHILA Macquart 



1834. Limnophila Macquart, Suit, a Buff., vol. 1, Hist. Nat. Ins., Dipt, 

 p. 95. 



LlMNOPmLA (LIMNOPHILA), species, near PICTIPENNIS (Meigen) 



1818. Limnobia pictipennis Meigen. Syst. Beschr. Zweifl. Ins., vol. 1, 

 p. 119. 



A female, Okeanskaja, Siberia, August 1923 (T. D. A. Cockerell). 

 The Palaearctic species of this subgenus have not yet been satisfac- 

 torily differentiated. 



LIMNOPHILA INCONCUSSA Alexander 



1913. Limnophila inconcussa Alexander, Can. Ent., vol. 45, pp. 313-314, 

 pi. 4, fig. 2 (wing); pi. 10, fig. 12 (male hypopygium). 



Two specimens taken at Tsuruga, Japan, August 1923, by Profes- 

 sor and Mrs. Cockerell. This is the commonest and most widely 

 distributed member of the genus in Japan, extending southward into 

 Taiwan. 



LIMNOPHILA NEMORALIS (Meigen), variety 



1818. Limnobia nemoralis Meigen, Syst. Beschr. Zweifl. Ins., vol. 1, p. 126. 

 One male specimen, Olga, Siberia, July 1923 (T. D. A. Cockerell). 



Genus PILARIA Sintenis 



1888. Pilaria Sintenis, Sitzber. Nat.-Ges. Dorpat, vol. 8, p. 398. 



PILARIA FUSCIPENNIS (Meigen), variety 



1818. Limnobia fuscipennis Meigen, Syst. Beschr. Zweifl. Ins., vol. 1, 

 p. 125. 



Specimens from Amagu Village, Siberia, July 1923 (T. D. A. 

 Cockerell) . 



