ART. 4 CBANE FLIES FROM SIBERIA — ALEXANDER 19 



bearing conspicuous long black setae. Inner dististyle a long flat- 

 tened blade, gradually narrowed to the slender black apex. Me- 

 dian area of ninth sternite membranous, on either side of the median 

 line with a fleshy flattened lobe, directed caudad, the outer margin 

 fringed with long yellow setae. Eighth sternite unarmed. 



Described from a single male, coUected at Amagu, Kudia River, 

 Siberia, July 1923 (T. D. A. Cockerell). 



Type.— Male, Cat. No. 28369, U.S.N.M. 



TIPULA SIBIRIENSIS, new species 



General coloration gray; wings with a faint yellowish tinge, the base 

 and costal region strongly yellow, the disk clouded with pale brown; 

 a broad band of the ground-color beyond the cord completely tra- 

 verses the wing; tip of vein R^ atrophied. 



Male. — Length about 13 mm,; wing, 17 mm. 



Frontal prolongation of head yellowish gray; nasus distinct; palpi 

 elongate, dark brown. Antennae of moderate length, if bent back- 

 ward extending beyond the wing- root; scapal segments and first flagel- 

 lar segment yellow; remaining flagellar segments yellow, the basal en- 

 largements of the individual segments black; on the subterminal and 

 outer segments, the ground-color becomes more infuscated. Head 

 dark gray, the anterior part of the vertex more yellowish; vertex 

 with a vaguely indicated brown median line. 



Pronotum gray, the anterior notum tumid dorso-medially and more 

 tinged with brown. Mesonotal praescutum light gray with four 

 vaguely defined brownish gray stripes that are better dehmited near 

 the suture; scutum light gray, the centers of the lobes marked with 

 darker; scutellum gray, more or less infuscated basally; postnotum 

 light gray. Pleura clear light gray, the dorso-pleural membrane 

 buffy-yellow. Halteres pale yellow, the knobs infuscated. Legs with 

 the coxae light gray; trochanters dark yellow; femora brownish yel- 

 low, near mid length passing into brown; tibiae brown, the tips becom- 

 ing still darker brown ; tarsi brownish black. Wings with a faint yel- 

 lowish tinge, the base, costal region and the space behind vein Cu 

 strongly yellowish; stigma oval, dark brown; a small brown spot at 

 origin of Rs and conspicuous seams on the branches of Cu; paler brown 

 clouds in the cells, darker at the wing-apex, restricting the ground- 

 color to a broad conspicuous cross-band beyond the cord, extending 

 from the costal margin beyond the stigma, passing caudad through 

 the bases of cells R^, R^, R^, and all of cell 1st M^, through cell i/^ to 

 the wing-margin; cell if is largely pale with a brown cloud near mid- 

 length and another at its outer end; cell 1st A largely suffused with 

 pale brown, interrupted by a pale area near the basal third; veins 

 dark brown, paler in the flavous areas. Venation: Tip of vein i?2 



