1915.] NATURAL SCIENCES OF PHILADELPHIA. 509 



Tipula megaura Doane. 



Tipula vicgaura Doane; .Journal of the New York Entomological Society, 

 vol. 9, No. 3, pp. 112, 113; 1931. 



Coloration pale brownish yellow, the thoracic stripes reddish 

 brown; antennal flagellum uniform in color or nearly so; male 

 hypopygium with the ninth tergite tumid, produced into four sub- 

 equal teeth; ninth pleurite produced into two subchitinized processes. 



Male. — Length, 12.7 mm.; wing, 14.6 mm. 



Frontal prolongation of the head moderately long, with abundant 

 long black hair above; nasus not evident. Palpi light brown. 

 Antennae rather short, the segments uniformly light brownish yellow. 

 Head pale brownish yellow, sparsely grayish pruinose with a broad 

 median depression; head with numerous scattered black hairs. 



Thoracic dorsum pale brownish yellow with three light reddish 

 brown stripes, the median one broad, split by a narrow vitta of the 

 ground color; scutum with the lobes light brown; scutellum and 

 postnotum yellowish. Pleura yellowish, thickly dusted with a 

 bluish white pollen. Halteres pale, the knobs dark brown. Legs 

 with the coxae pale yellow, bluish white pruinose; trochanters 

 yellow; femora light brown, rather broadly tipped with darker; 

 tibiae and tarsi brown. Wings pale brownish yellow, the costal cell 

 more saturated, yellowish; a vitreous antestigmal blotch, interrupted 

 near the fork of the sector, most distinct along the cord and com- 

 pletely filling the small cell 1st M-,; veins dark brown (see Plate 

 XVII, fig. 22). 



Abdominal tergites brownish yellow, with the caudal margin 

 narrowly, the lateral margin broadly bordered with silvery; a broad 

 dorsal median stripe extending the length of the abdomen; sternites 

 dull yellow, the caudal margins of the segments narrowly silvery. 

 Male hypopygium (see Plate XVIII, fig. 42) with the ninth tergite 

 (see Plate XIX, fig. 59) tumid as in most of this group of species, the 

 posterior margin produced caudad and dorsad into a stout median 

 lobe which bears two subequal, slightly divaricated lobules which 

 are not blackened or chitinized ; on the caudal face of the segment a 

 tooth on either side of the median line, this directed caudad and 

 slightly ventrad; the upper pair of teeth or lobules are smooth, but 

 covered with a dense whitish pubescence; the lower pair which are 

 a little more widely separated are covered with scattered setigerous 

 tubercles; the ventral outer edge of the segment bears a broad, 

 subchitinized (but not blackened except underneath) lobe on either 

 side of the middle line, this lobe bifid, the proximal arm roughened, 



