ART 4 CRAXE FLIES FROM SIBERIA ALEXANDER 15 



crosses the wing before the cord, narrowest in cell C at the tip of 

 vein 8c, and* at the posterior margin of the wing on both sides of 

 vein Cwj ; this area includes more than the basal half of cell 1st J/,; 

 additional pale blotches in outer half of cell R^, in base of cell M^ 

 and restrictedly in cell 2nd AL; veins brown, paler in the costal 

 region and radial field. Venation: i?, persistent; 7m longer than the 

 petiole of cell M^; in-cu punctiform; cell 2nd A broad. 



Abdominal tergites brownish yellow, the base of the abdomen 

 brighter, the segments with ill-defined sublateral brown stripes; pos- 

 terior segments with indications of a median vitta; sternites more 

 uniformly yellowish. Ovipositor with the valves long and straight, 

 especially the slender tergal valves. 



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

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



2V;9e.— Female, Cat. No. 2S36G, U.S.N. M. 



TIPULA LIGULIFERA, new species 



Antennae of male moderately elongate; flagellum black, the basal 

 enlargement of each segment conspicuously light yellow; wings brown- 

 ish yellow; cell J/j short-petiolate to sessile; male hypopygium with 

 the eighth sternite produced caudad into a conspicuous liguliform 

 blade. 



Male. — Length, 12-13 mm.; wing, 11.2-11.5 mm. 



Frontal prolongation of head relatively short, brownish yellow; 

 nasus long but relatively stout, concolorous. Antennae moderately 

 elongate, if bent backward, extending about to the base of the abdo- 

 men; scapal segments light brown; flagellar segments black, the 

 basal enlargements of the individual segments conspicuously light 

 yellow, this greater in amount on the basal segments, becoming more 

 restricted in extent on the outer segments; verticils relatively short 

 but stout. Head light brown, the orbits indistinctly paler. 



Pronotum testaceous brown. Mesonotal praescutum obscure 

 brownish yellow with four slightly darker, ill-defined brownish stripes ; 

 centers of scutal lobes darkened ; remainder of the mesonotum brown- 

 ish testaceous. Pleura whitish testaceous, the pleurotergite brighter. 

 Halteres pale brown, the base of the stem paler. Legs with the coxae 

 whitish testaceous; trochanters pale yellow; femora and tibiae light 

 brown, the tarsi passing into dark brown. Wings with a strong 

 brownish yellow tinge, the base and costal region more yellowish; 

 stigma small, oval, pale brown; a conspicuous obliterative area before 

 the stigma, extending from vein By before and including the cord, 

 crossing the proximal end of cell IstM^ into the base of cell M^; veins 

 brown. Venation: Rs moderately elongate, arcuated, about one-half 

 longer than R^+z', R^ preserved throughout its length; cell IstM^ long 



