1913] The North American Species of Tipula. 471 



76. Posterior cells one and four white at base. Yellowish; abdomen with 



three fuscous stripes; hypopygium small; ninth tergite nearly divided, 

 lobes rounded, posterior margin of each bidentate, ninth sternite 

 with deep V-shaped emargination, containing two hairy pendulous 

 appendages. Wings brownish with about four conspicuous, whitish 



spots. Length 143^-18 mm serta Loew 



Posterior cells one and four not white at base 77 



77. First and fifth posterior cells white at base. Brown, mesonotum with 



four brown stripes; abdomen with narrow lateral stripes; hypopygium 

 small, ninth tergite terminating in a median, short and rather acute 

 point. Wings grajash with faint, whitish spots, stigma surrounded 

 by white, a large white spot covers tips of basal cell and base of discal 



and fourth and fifth posterior cells. Length 14 mm. (cf ) 



subtemiicornis Doane 

 First posterior cell only, white* at base 78 



78. Wing spots distinct, posterior margin of wing not white, legs rubust. 



Abdomen trivittate; hypopygium not large, ninth tergite short, broad, 

 emarginate posteriorly, ninth sternite broadly and very deeply emar- 

 ginate, the emargination filled by a membrane, from the posterior 

 border of which arises a slender process which ends in two large, 

 fleshy lobes, which are emarginate at the apex. Wings brownish, a 

 large whitish spot, common to anal and axillary cells Length 14-22J'2 



mm angustipennis Loew 



Wing spots very indistinct, posterior margin of wings whitish, legs 

 slender; thoracic vittse subconfluent; abdomen with black median 

 stripe; hypopygium large with two large, pendulous appendages. 

 Length 1)4, mm appendicidata Loew 



79. Joints of fiagellum unicolorous 80 



Same as all the joints of flagellum bicolorous 81 



80. Pleura without oblique, fuscous stripe. Brown; mesonotum with three 



grayish-brown 'fuscous bordered vittse, abdomen with broad, inter- 

 rupted, brown lateral stripes, lateral margins of ninth tergite produced 

 into short, blunt points, posteriorly; all posterior cells margined 



with brown. Length 16 mm. (cf) fuluvilineata Doane 



graphica Doane 

 Pleura with oblique fuscous stripe. Yellowish; posterior border of 

 abdominal segments whitish; discal cell subovate, first posterior cell 

 without subhyaline stripe. Length 13 mm. (cf ) subeluta Johnson 



81. Median vitta of wing attains the apex 82 



Median vitta of wing does not attain the apex 85 



82. Costal stripe sinuous posteriorly. Thoracic stripes not sharply defined; 



abdomen with lateral fuscous stripes; hypopygium small, ninth tergite 

 rounded posteriorly with a rounded, median process terminating its 

 posterior margin, ninth sternite with a very deep V-shaped incision; 

 second posterior cell small, fourth and fifth white at base. Length 



12^-163^ mm .' bella Loew 



Costal stripe not sinuous posteriorly 83 



83. The hyaline vitta of the wing passes through the first posterior cell to 



the apex; abdominal segments without dark fuscous, transverse line 

 before the posterior margin, the latter and lateral margin of segments 



paler. Length 14 mm. ( 9 ) ehUa Loew 



Hyaline vitta does not pass through the first posterior cell to the apex; 

 dark transverse line before the posterior margin of the abdominal 

 segments 84 



*In the male of angustipennis this cell is frequently not white. 



