ART 4 CEANE FLIES FKOM SIBERIA ALEXANDER 7 



tips brightened; trochanters obscure yellow; femora obscure yellow 

 basally, dark brown towards the tips; on the forelegs the femora 

 are dark brown with the exception of the basal fourth; middle and 

 hind femora with the extreme tips a little paler than the subterminal 

 darkened portions; tibiae and tarsi dark brown. Wings with a gray- 

 ish tinge, the costal cell strongly infuscated; conspicuous brown spots 

 at origin of Rs and tip of Sc; stigma brown, sending seams caudad 

 onto r and to the fork of Rs; posterior cord and outer end of cell 

 1st J/, niore narrowly seamed with brown; wing-tip in cells 2nd R^, 

 Rs, R5, and 2nd M^ more weakly infuscated, especially in the centers 

 of the cells; veins pale brown, the prearcular veins and Cu more yel- 

 lowish. Venation: Sc^ ending beyond mid-length of Rs, Sc^ only a 

 trifle shorter than Sc^; Rs long, arcuated at origin; r at tip of R^; 

 inner end of cell R^ lying a little proximad of that of cell 1st M^; 

 cell 1st M^ gently widened distally, m about equal to the outer 

 deflection of M^] basal deflection of Cu^ at the fork of M. 



Abdominal tergites dark brown, the sternites a little paler, yellow- 

 ish brown, especially the intermediate segments. Ovipositor with the 

 tergal valves slender, gently upcurved, the tips acute; sternal valves 

 stout, relatively straight, the base abruptly blackened. 



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

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



2^j/pe.— Female, Cat. No. 28359, U.S.N.M. 



Rhipidia { Monorhipidia) sibirica is allied to R. (M.) uniseriata 

 Schiner (Western Palaearctic) and R. {M.) Jldelis Osten Sacken 

 (Eastern Nearctic), differing in the venation and coloration of Ihe 

 legs. 



RHIPIDIA (ARUIPIDIA) PULCHRA SEPTENTRIONIS Alexander 



1913. Rhipidia pulchra septentrionis Alexander, Can. Ent., vol. 45, pp. 206- 

 207, pi. 3, fig. 1 (wing). 



Specimens from Vladivostok and Kudia River, Amagu, Siberia, 

 July 1923 (T. D. A. Cockerell). The northern form of the Oriental 

 pvlchra is widely distributed throughout the Japanese Empire but 

 had not previously been recorded from Siberia. 



Tribe KEXATOMINI 



Genus PSEUDOLIMNOPHILA Alexander 



1919. P seudolimnophila Alexander, Cornell Univ. Agr. Expt. Sta., Mem. 

 25, p. 917. 



PSEUDOLIMNOPHILA OCHRACEA ASIATICA, new subspecies 



Female. — Length about 9 mm.; wing, 9 mm., its width, 2.S mm. 

 Generally similai- to typical ocJiracea (Meigen) of the Western 

 Palaearctic Region, differing as follows: 



