1913] The North American Species of Tipula. 463 



9. Fascia does not extend beyond the fourth posterior cell; joints of flagel- 

 lum bicolorous. Brown; three mesonotal stripes, margined with 

 darker brown; abdomen trivittate; posterior margin of ninth tergite 

 with two triangular projections, between which is a deep, narrow 

 U-shaped incision; ninth sternite with deep V-shaped incision; pleural 



suture distinct. Length 14-19 mm aspersa Doane 



Fascia reaches the posterior wing margin; joints of flagellum fuscous. 

 Brown; antennae long; mesonotal vittae very broad; abdomen trivittate 

 posterior margin of segments yellowish; hypopygium small, ninth 

 tergite with a small, ninth sternite with deep and rather broad inci- 

 sion. Length 12 mm. (o 71 ) decora Doane 



10. Fascia V-shaped, broken; joints of flagellum not bicolorous. Brownish- 



yellow, mesonotal vittas broad. Abdomen spotted, trivittate; ninth 

 tergite tumid, posterior margin with broad crescent-shaped incision, 

 in the middle of which is a small semi-circular incision; posterior mar- 

 gin of ninth sternite bearing a pair of leaf like appendages. Length 



20 mm. (c? ) albimacula Doane 



Fascia not distinctly angulate 11 



11. Joints of flagellum unicolorous; thoracic vittae not margined 12 



Joints of flagellum bicolorous; thoracic vittae margined; posterior cells 



1-3 infuscate. Dark-yellowish; mesonotal vittae broad; abdomen 

 conspicuously trivittate. Length 14 mm. ( 9 ) fuliginosa Say 



12. Posterior cells 1-3 more or less white. Gray; mesonotal vittae broad; 



abdomen with three stripes; ninth tergite with median impression and 

 slight incision; posterior margin of ninth sternite with a broad, blunt 



triangular process; pleural sutuie present. Length 17 mm 



vittatapennis Doane 



albovittata Doane sgn. 



Posterior cells 1-3 not white 13 



13. Posterior margin of abdominal segments not paler. Brown; metanotum 



with three gray lines, margined with fuscous. Abdomen with dorsal 

 stripe; ninth tergite with deep, broad V-shaped incision; ninth sternite 

 with deep, very narrow incision. No pleural suture. Length 11 



mm. ( c? ) cylindrata Doane 



Posterior margin of abdominal segments paler 14 



14. A white spot in middle of first basal cell. Yellowish; mesonotum with four 



brown stripes. Abdomen trivittate; eight sternite produced and nar- 

 rowed behind, with shallow, rounded incision; hypopygium large, 

 ninth tergite with a slight depression and two very small points; 

 ninth sternite with shallow, rounded incision containing a pair of pro- 

 cesses; nearly all the veins bordered with whitish. Length 17 mm. . . 



spectabilis Doane 

 First basal cell without a white spot. Brown; mesonotum gray with five 

 brown stripes; abdomen trivittate; ninth tergite with deep median fur- 

 row, posterior margin with small V-shaped incision; ninth sternite 

 with broad- deep incision containing two tumid processes. Length 

 18-25 mm incisa Doane 



15. Apex of wings blackish; a broad whitish, subapical fascia. Yellow, thorax 



trivittate; abdomen with dorsal line and indistinct lateral lines. 



Length 15 mm. ( 9 ) •>. apicalis Loew 



Apex of wings not blackish 16 



16. Joints of flagellum bicolorous. Median vitta of thorax obsolete, lateral 



vittae very distinct, fuscous; abdomen pale, last two segments and 

 posterior margin of the remaining ones, dark fuscous; hypopgyium 

 large, ninth tergite prolonged posteriorly into a median, laterally 

 compressed, bladelike process; ninth sternite with broad V-shaped 

 incision, prolonged anteriorly into a narrow slit, from the base of 



which project two long setae. Length 9-12 mm fasciata Loew 



Joints of flagellum unicolorous 17 



17. Antennae wholly fuscous 18 



Antennae not wholly fuscous , , • 19 



