20 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 68 



abruptly atrophied, the basal spur (about one-half the total length) 

 provided with macrotrichiae; m and petiole of cell M^ subequal; tyi-cu 

 punctiform, near one-third the length of the cell. 



Abdomen with the basal segments yellow, the tergites with a 

 rather indistinct dorso-median stripe that is interrupted at the pos- 

 terior margins of the segments; subterminal sternites darker. Male 

 hypopygium (fig. 8) with the ninth tergite large, the lateral lobes 

 produced caudad into flattened, obtuse blades, the mesal edge being 

 produced slightly into flattened chitinized flanges; caudal notch of 

 tergite broadly rounded, the dorso-median portion of the sclerite 

 produced caudad for a slight distance into this indentation, which is 

 thus feebly bifid at its base (fig. 9). Outer dististyle relatively 

 large, pale, somewhat flattened. Ventral mesal margin of basistyle 

 an oval, dark-colored fleshy lobe, the mesal edge provided with 

 sparse erect yellow setae lying across the genital chamber. Eighth 

 sternite with the caudal margin provided with an even fringe of 

 conspicuous elongate yellow setae. 



Described from a single male, collected at Okeanskaja, Siberia, 

 August 1923 (T. D. A. Cockerell). 



r?/2>6— Male, Cat. No. 28370, U.S.N.M. 



Genus NEPHROTOMA Meigen 



1803. Nephrotoma Meigen, Illiger's Mag., vol. 2, p. 262. 



1834. Pachyrrhina Macquart, Hist. Nat. Ins., Dipt. vol. 1, p. 88. 



NEPHROTOMA VIRGATA (Coquillett) 



1898. Pachyrrhina virgata Coquillett, Proc. U. S. Nat. Mus., vol. 21, p. 306. 

 Several specimens from various Siberian localities apparently be- 

 long here. Vladivostock, 1923. Okeanskaja, August 1923. Kudia 

 River, Amagu, July 1923 (T. D. A. Cockerell). The species is com- 

 mon and widely distributed throughout the Japanese Empire. 



NEPHROTOMA CORNICINA (Linnaeus), variety 



1758. Tipula cornicina Linnaeus, Syst. Natur., ed. 10, p. 586. 

 Three males from Okeanskaja, Siberia, August 1923 (T. D. A. 

 Cockerell) . 



NEPHROTOMA ACULEATA (Loew), variety 



1871. Pachyrrhina aculeata Loew, Beschr. Eur. Dipt., vol. 2, p. 20. 

 A male, Amagu Village, Siberia, July 1923 (T. D. A. Cockerell). 

 The typical form is from the Western Palaearctic Region. 



