ART 4 CRANE FLIES FROM SIBERIA ALEXANDER 13 



of 'pilipes, as would now appear to be the case, the present fly has 



the most extended range of any TipuUd, bemg found in virtually all 



parts of the world, including many of the most remote oceanic 



islands. 



Genus GONOMYIA Meigen 



1818. Gonomyia Meigen, Syst. Beschr. Zweifl. Ins., vol. 1, p. 146. 



GONOMYIA (GONOMYIA), species, near SUPERBA Alexander 



1913. Gonomyia (Gonomyia) superba Alexander, Can. Ent., vol. 45, pp. 

 285-286, pi. 3, fig. 14 (wing); pi. 10, figs. 1-2 (hypopygium) . 



A single badly damaged specimen, Amagu Village, Siberia, July 

 1923 (T. D. A. Cockerell), that appears to belong here. The species 

 is the most widely distributed Japanese member of the genus. 



Genus RHABDOMASTIX Skuse 



1889. Rhabdomastix Skuse, Proc. Linn. Soc. N. S. Wales, ser. 2, vol. 4, pp. 



828-829. 



RHABDOMASTIX (SACANDAGA) USURIENSIS, new species 



General coloration black, light gray pruinose; knobs of halteres 

 conspicuously light yellow ; wings with a strong brown tinge ; veins 

 i?i and i?2 widely separated at wing-margin ; R^ longer than i^j+s- 



Male. — Length about 3.5-3.6 mm.; wing, 4.5-4.6 mm. 



Rostrum and palpi black. Antennae short, black, the flagellar 

 segments oval. Head black, heavily light gray pruinose. 



Pronotum and mesonotum black, light gray pruinose ; pseudosu- 

 tural foveae black. Pleura gray pruinose. Halteres dark brown, the 

 knobs conspicuously pale yellow. Legs with the coxae and trochan- 

 ters black, gray pruinose; femora and tibiae dark brown, the bases 

 of the former vaguely paler; tarsi black. Wings with a strong brown 

 tinge, the veins still darker brown. Venation: Sc^ ending between 

 one-third to two-fifths the length of the long, nearly straight Rs, Sc^ 

 close to its extreme tip but relatively indistinct ; R^ oblique, at the 

 wing-margin separated from the tip of /?i by a distance greater than 

 its own length; R^ longer than R^+s, cell R2 thus being relative ely large; 

 r lacking. Anal angle of wing moderately developed. No macro- 

 trichiae on veins Rs, R2+3, R2 or R^ ; numerous trichiae on J^^+g for its 

 entire length. 



Abdomen black, gray pruinose; hypopygium black. 



Described from three males collected at Okeanskaja, Siberia, 

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



Type.— Male, Cat. No. 28365, U.S.N.M. 



