12 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 68 



segments infuscated; wings pale yellow, the veins darker yellow; male 

 hypopygium with the gonapophyses terminating in acute blackened 

 horns. 



J/aZe.— Length about 4 mm.; wing, 5.4 mm. 



Rostrum and palpi brown. Antennae pale reddish brown, the 

 terminal segments more infuscated. Eyes large, contiguous beneath. 

 Head yellow. 



Mesonotum reddish, more or less discolored, the lateral margins 

 of the praescutum and scutum light yellow, this color extending 

 back to the wing-root; scutellum and lateral margins of the post- 

 notal mediotergite similarily yellow. In normal specimens it is 

 possible that this yellow color is much more extensive. Pleura red- 

 dish yellow. Halteres pale, the knobs conspicuously brownish black. 

 Legs yellow, only the terminal tarsal segments infuscated. Wings 

 pale yellow, the veins darker yellow. Venation: As in the subgenus; 

 R 2+3 about one-half longer than the basal section of i?,; "^^in 2nd A 

 very strongly sinuous. 



Abdomen brownish yellow. Male hypopygium with the basistyles 

 relatively stout. Outer dististyle apparently broken off at base. 

 Inner dististyle (fig. 3) a strongly curved arm, pale except at the 

 suddenly pointed apex which is blackened. Gonapophyses appear- 

 ing as slender, nearly straight horns, the apical third blackened, the 

 tips acute. Aedeagus lyriform, each half provided with a long, 

 curved branch that is directed caudo-laterad, thence mesad and 

 finally strongly cephalad. 



Described from a single male taken at Amagu Village, Siberia, July 

 1923 (T. D. A. Cockerell). 



r(/2)e.— Male, Cat. No. 28364, U.S.N.M. 



Genus HELOBIA St. Fargeau et Serville 



1825. Helobia St. Fargeau et Serville, Encyclop. Method. Ins., vol. 10, p. 



585. 

 1830. Symplecta Meigen, Syst. Beschr. Zweifl. Ins., vol. 6, p. 282. 



HELOBIA HYBRIDA (Meigen) 



1804. Limonia hybrida Meigen, Klass., vol. 1, p. 57, pi. 3, fig. 17. 



One specimen, Vladivostock, Siberia, 1923 (T. D. A. Cockerell). 



This common crane fly is very widely distributed throughout the 



Holarctic Region. 



Genus TRIMICRA Osten Sacken 



1861. Trimicra Osten Sacken, Proc. Acad. Nat. Sci. Phlla., p. 290. 



TRIMICRA PILIPES (Fabricius) 



1787. Tipula pilipes Fabricius, Mantissa Ins., vol 2, p. 324. 



One male, Kongaus, Siberia, August 1923 (T. D. A. Cockerell). 

 If most of the numerous described species of Trimicra are synonyms 



