1913] The North American Species of Tipula. 477 



122. Ante-stigmal spot extends into the bases of the fourth and fifth posterior 



cells, one or two irregular whitish hyaline spaces in anal and axillary 

 cells. Mesonotum with four brown lines; posterior margin of abdom- 

 inal segments gray; ninth tergite short, divided by deep median 

 ncision; ninth sternite with deep, median incision. Wings with 



grayish tinge. Length 15-25 mm. . : impudica Doane 



Ante-stigmal spots extends into fourth posterior cell only; no hyaline 

 spots in anal and axillary cells. Mesonotal vittag very distinct; 

 ninth tergite rather short, with deep broad, V-shaped emargination; 

 ninth sternite with triangular emargination, the anterior end of 

 which is almost circular; eight sternite with nearly semi-circular 

 emargination; pleural plates distinct. Length 13-18 mm. .praecisa Loew 



123. Joints of flagellum lighth brown, darker at the base; eighth sternite not 



emarginate. Ninth tergite with median furrow, lateral angles 

 slightly produced; ninth sternite divided by a rather wide membran- 

 ous portion, posterior margin with a pair of two parted appendages. 



Wings hyaline. Length 12 mm rusticola Doane 



Joints of flagellum fuscous; eighth sternite with shallow, broad rounded 

 incision. Hypopygium large, ninth tergite of moderate length, nar- 

 rowly emarginate in the middle, apical margin of each side very 

 slightly emarginate; ninth sternite widely and very deeply emargin- 

 ate, with a broad, subtriangular process each side. Length 18 mm. 



biarmata Doane 



124. Posterior margin of abdominal segments paler 125 



Posterior margin of abdominal segments not paler; abdomen more or less 



distinctly trivittate 126 



125. Mesonotum yellowish with three broad brown stripes; median fuscous 



vitta of abdomen broad; posterior margin of eight sternite with two 

 median short projections; median third of ninth tergite yellow, rest 

 brown, with broad, deep incision and median depression; ninth ster- 

 nite with very broad, deep U-shaped incision, lateral margin with a 

 pair of short processes; pleural plates distinct, produced into a long, 

 two pointed process; ante-stigmal spot indistinct and does not reach 

 the base of the fourth posterior cell. Length 9-11 mm. . .atrisumma Doane 



streptocera Doane, see under 111. 



impudica Doane, see under 122. 



fulvinodus Doane, see under 140. 



albicincta Doane, see under 117. 



126. Mesonotum with four brown stripes; eight sternite produced, not emar- 



ginate; with a rather broad, elongated round tipped flap; ninth tergite 

 short, divided by a deep V-shaped incision; ninth sternite elongated, 

 deeply incised, lateral margin with long, slender pointed process. 

 Ante-stigmal spot broken, extends into base of fourth posterior cell. 



Length 19 mm. (o 71 ) pyramis Doane 



Mesonotum with three or five brown stripes or lines; eight sternite 

 emarginate at apex; ninth sternite deeply divided 127 



127. Ninth tergite small, bi-emarginate at the apex. Mesonotum with three 



brown stripes; scutellum yellow with median brown line; emargina- 

 tion of ninth sternite filled with two appendages, each terminating in 

 a pair of backward projecting claws. Wings hyaline with slight 

 brownish tint, stigma inconspicuous; ante-stigmal spot distinct, 

 extends into the base of the fourth posterior cell. Length 18-27 mm. 



planicornia Doane 

 Ninth tergite broadly or deeply emarginate; ante-stigmal spot reaches 

 the base of the fourth posterior cell ~. 128 



128. Mesonotum with three broad, brown stripes; ante-stigmal spot dis- 



tinct; abdominal stripes indistinct. Emargination of eighth sternite 

 very broad, rounded; posterior margin of ninth tergite with broad and 

 shallow emargination, the latter with yellow border and bearing in 

 the middle a pair of blackish, triangular teeth; emargination of ninth 

 sternite U-shaped and containing a pair of tumid appendages. Length 

 (c? ) 16 mm sylvicola Doane 



