a 
956 CHARLES PAUL ALEXANDER 
T. conspicua Dietz. (Dietz, 1917: 149-150.) 
Tricolor group; close to 7. eluta. Grayish white; antennal flagellum distinctly bicolorous: 
thoracic stripes margined with brown, the median stripe divided by a dark line; hyaline 
vitta of wings reaching the outer margin; abdomen yellow, unstriped; ninth tergite with 
lateral pencils of hairs. Wing of male, 17 mm. (North Carolina, September.) 
T. sackeniana Alex. (Alexander, 1918 a: 62-63.) 
Tricolor group; close to 1’. tricolor. Coloration reddish brown; antennae _ bicolorous: 
male hypopygium without a pencil of hairs on either side of median lobe of tergite. Wing 
of male, 15.6 mm. (New York, Maryland, Virginia, and Georgia, July and September.) 
T. vicina Dietz. (Dietz, 1917: 148-149.) 
Tricolor group; close to T. eluta. Grayish brown; antennal flagellum unicolorous 
brown; mesonotal stripes margined with brown, the median stripe divided by a blackish 
line; hyaline vitta of wings extending thru cells {st M2 and R; to margin; abdomen striped 
laterally. Wing of male, 13 mm. (New York, May; Michigan, July.) 
T. entomophthorae Alex. (Alexander, 1918 c: 385-386.) 
Trivittata group; close to T. angulata. Mesonotal prescutum gray with three brown 
stripes; wings gray with a broad white crossband beyond the cord; vein R2 persistent for its. 
entire length; male hypopygium with the ninth tergite deeply notched medially,. the lateral 
angles obliquely truncated. Wing of male, 15.8 mm. (North Carolina.) : 
T. flavibasis Alex. (Alexander, 1918 ¢:411—412.) 
Valida group. A small, pale brownish species, easily distinguished from all its relatives 
by the bicolorous antennae, the basal enlargements of the segments being light yellow and 
the reznainder black. Antennae of male long and slender, if bent backward extending 
to beyond base of abdomen. In coloration of antennae the species in the faunal limits of this 
paper is approached only by T. tephrocephalta, a very different fly. Wing of male, 12 mm.- 
(Kansas, July.) 
T. huron Alex. (Alexander, 1918 a:66-67.) 
Valida group; close to T. submaculata. Wings with a heavy brown pattern resembling 
T. trivittata or T. angulata. Wing of male, 15.6 mm. (Wisconsin, June.) 
T. margarita Alex. (Alexander, 1918 b: 243-244.) 
General coloration of head and thorax light gray; antennae short, black, the three basal 
segments orange-yellow; femora with a broad subterminal yellow ring, most distinct on the 
fore legs; wings with four brown crossbands; abdomen yellow, the tergites with a. broad 
dark brown median stripe and narrow sublateral stripes, the lateral margin of the tergites 
broadly light gray; male hypopygium with the ninth tergite large, subquadrate, with a deep 
median split, the ninth pleurite complete, the eighth sternite with a large tuft of yellow 
hairs on either side of the median line. Wing of male, 14.4 mm. (New York, June.) 
T. fultonensis Alex. (Alexander, 1918 a:67.) 
Arctica group; close to 7. longiventris. Abdomen of female about one-half inch shorter 
than in the female of longiventris (16 mm.). Wing of female, 18.5 mm. (New York, June.) 
T. helderbergensis Alex. (Alexander, 1918 a: 64-65.) 
Hebes group; close to 7. latipennis. General color very dark; antennal flagellum uni- 
formly brown; male hypopygium with the eighth sternite densely fringed with long golden 
hairs. Wing of male, 14 mm. (New York, July.) 
It will be noted that many names are not included in this key to the 
genus Tipula, and this is because most of them are synonymous with 
species that are included. The principal synonymy is as follows: 
