1915.] NATURAL SCIENCES OF PHILADELPHIA. 505 



Ninth tergite tumid; eighth sternite shorter, not closely applied 

 to the ninth sternite for the entire length of the latter, the 

 tip wdthout chitinized points 2 



2. Ninth tergite with four lobes or horns megaura Doane.^ 



Ninth tergite with two or no horns 3 



3. No horns on the tergite johnsoniana sp. n. 



With horns on the tergite 4 



4. The horns on the tergite directed upward bicornis Forbes.^" 



The horns on the tergite directed caudad or slightly ventrad, 



morrisoni sp. n. 



The Palsearctic Tipida fascipennis Meigen (1818) was the first 

 described species of this group and should probably give the name 

 to the group. The Nearctic groups of the genus should be correlated 

 with the Palaearctic species. 

 Tipula jolmsoiiiana .sp. n. 



Coloration light yellow, the thoracic stripes grayish brown; 

 antennal flagellum uniformly brown; male hypopygium with the 

 ninth tergite tumid without processes; ninth pleurite produced 

 into a broad flattened process. 



Male. — Length, 17.5 mm.; wing, 19 mm. 



Frontal prolongation of the head rather short, with numerous 

 short black hairs on the dorsal and lateral surfaces; nasus indis- 

 tinct. Palpi light brown. Antennge rather long, much longer than 

 in the related bicornis Forbes; the flagellar segments are slightly 

 swollen basally; the scapal segments and the basal half to two-thirds 

 of the third segment dull yellow, the remainder of the appendage 

 dark brown. Head rich brownish yellow with abundant short 

 black hairs scattered over the dorsal surface. 



Pronotal scutum yellowish brown with an indistinct brownish 

 spot on the side of the sclerite. Mesonotal prsescutum light yellow 

 with three grayish bro^\^l stripes, of which the median one is broadest 

 and longest; the interspaces between the stripes are provided with 

 numerous long yello^vish hairs; scutum, scutellum and postnotum 

 dull brownish yellow. Pleura pale yellow, thickly whitish poUinose; 

 trochanters dull yellow; femora yellow with the apex narrowly dark 

 bro"s\Ti; tibiae browm, the apex obscurely darker; tarsi brown. Wings 

 with a slight grayish tinge, more yellowish in the costal region and 

 in cell M adjoining vein Cn; stigma dark browm; a conspicuous 



3 megaura Doane ; Journal of the New York Entomological Society, vol. 9, No. 

 3, pp. 112, 113 ; 1901. 



^"^hicornis Forbes ; Sixteenth Report State Entomologist of Illinois, p. 78, Plate 

 6, fig. 4 ; 1891. 

 33 



