1913] The North American Species of Tipula. 469 



60. Yellow; mesonotum quadro-vittate. Hypopygium large, ninth tergite 



produced into two long flattened sub-triangular processes; ninth 

 sternite produced laterally into rather long very acute triangular 

 appendages. The white spot extends through the fourth posterior cell 



to the posterior margin. Length 17 mm. (c?) armala *Doane 



Brown; mesonotum with three brown stripes; pleura slate colored. 

 Posterior margin of abdominal segments paler; posterior margin of 

 ninth tergite depressed shining black with median, short blunt pro- 

 cess; ninth sternite with rounded emargination, containing a pair of 

 rather long, tumid appendages. Wings gray with three conspicuous, 

 white spots. Length 15-23 mm albonotata Doane 



61. Abdomen pale yellowish, posterior margin of segments dark fuscous.. . 



fasciata fLoew 

 Abdomen not so marked 62 



62. Gray; ovipositor with a large, oval piceous and shining shield above, 



terminated by two movable, lanceolate, serrated and ferruginous 

 lobes; penultimate joint (of abdomen) with two long, slender spines 



beneath; length 21-22 mm arctica {Curtis 



Not gray; ovipositor not so constructed 63 



63. Fuscous; abdomen ferruginous with two fuscous stripes; thorax with 



pale brown stripes. Wings brownish with several whitish spots and 



three fuscous spots near the costal margin. Length 16 mm. (c?) 



platymera Walk 

 Yellowish species; abdomen trivittate 64 



64. Thorax grayish, or yellowish gray; all the joints of flagellum bicolored. 



Hypopygium very large, pleural pieces greatly elongated, linear. 

 Three or four fuscous spots near the anterior margin, fourth and fifth 



posterior cells partly white. Length 13-14 mm macrolabis Loew 



Mesonotum light yellow with four brown stripes. Ninth tergite ( 9 ) 

 nearly concealed beneath the eight. Wings tinged with brown, a 

 brown spot in the anterior margin of first basal cell, origin of prae- 

 furca and over the stigma, an incomplete whitish band before the 

 stigma extends to base of fourth posterior cell. Length 19 mm. ( 9 ) 



varia Doane 



65. Joints of flagellum bicolorous : 66 



Joints of flagellum unicolorous : §69 



66. Cinereous, thoracic vittae distinct 67 



Yellowish, thoracic vittas concblorous, indistinct; apical third of wing 



infuscate 68 



67. White spots at end of veins; mesonotum with two brown lines, confluent 



anteriorly; wings dusky, three or four white spots along central veins, 

 stigma margined white; abdomen blackish; apex of femora blackish. 



maculalipennis Say 

 No white spots at end of veins; thoracic stripes margined; abdomen 

 yellowish-gray with three dark stripes, hypopygium small, ninth ter- 

 gite small, ovate; ninth sternite absent (?). Wings pale fuscous with 

 four pale spots; base of first and fifth posterior cells white. Length 

 14 mm balioptera Loew 



68. The white spot before the stigma extends across the wing and attains 



the posterior margin. Hypopygium large, ninth tergite broadly 

 and profoundly emarginate, the lateral angles extended into sharp 

 points; ninth sternite nearly concealed by the large, protuberant eighth 

 sternite, pleural plates present, small, the lower angle of the right 

 pleural plate prolonged into a two pronged process. Length 17 mm. 



speciosa Loew 

 The white spot does not extend beyond the base of the fourth posterior 

 cell. Smaller, and wings paler than in speciosa. Length 15-16 mm. 



submaculata Loew 



*See also under 20. 



fSee under 16. 



JType specimens minus antennae. 



§Indistinctly seen in T. valida, Loew; antennas wanting in T. versi-color, 



