NO. 2344. SVPERFAMILY TIPULOIDEA— ALEXANDER AND McATEE. 399 



9. Large species, wing of male over 20 mm 9a. 



Smaller, wing of male under 20 mm. ; antennae longer, bicolorous ; praes- 



cutal stripes not distinctly margined with darker ; wing pattern very pale, 

 the whitish including almost all of cell M and all except the tips of cells 



Ml, M2, and Mz; abdomen with the lateral stripes less distinct 



T. strepens (p. 40G). 



9a. Antenna! flagellum shorter, unieolorou.s dark brown ; wings dark brown with 



cell 1st M. and the apical two-thirds of lU hyaline; the brown marking 



covers cells Mi and M2 Cui, and all but the extreme base of Ms; ninth 



terglte of male hypopygium with a powerful, slightly curved, claw-like 



horn on either side of the median lob T. novehoracensis (p. 406). 



Antennal tlagelluni longer, indistinctly bicolorous ; wings dark brown, with 

 the hyaline areas including the basal half of cell first M2, the bases of 

 cells Ml, second M2, and M3, and the apical half of Ri-, ninth tergite of 



male hypopygium without such horns subtending the median lobe 



T. caloptera (p. 404). 



10. Antennae short, with only the ba.sal segments of the flagellum distinctly 



bicolorous ; wing pattern more clear cut, the costal stripe broader and 

 larker brown, vein Cu and the basal deflection of Cui with a broad, dark 



brown seam 7\ hella (p. 404). 



Antennae longer, with all except the terminal segments of the flagellum 

 distinctly bicolorous ; wing pattern less distinct and rather poorly defined, 

 the brown seams and stripes much paler T. cluta (p. 404). 



11. Wing pattern clear cut, the milky white obliterative streak proximad of the 



cord passes beyond cell first M2 and almost reaches the posterior margin 

 of the wing; male hypopygium without a pencil of setae on either side 



of the ninth tergite 2\ fraterna (p. 404). 



V\'ing pattern more diffuse, the white obliterative streak ending in the ex- 

 treme base of cell M3 12. 



12. Coloration gray, the thoracic stripes darker; male hypopygium with a pencil 



of reddish setae on either side of the ninth tergite T. tricolor (p. 407). 



Coloration reddish brown, the tlioracic stripes I'eddish ; male hypopygium 

 without such a pencil of setae T. sackeniana (p. 406). 



13. Costal margin of the wings dark brown ; male hypopygium with the sclerites 



of the ninth segment fused into a continuous ring 12. 



Costal margin of the wings not dark brown 15. 



14. Wings with the brown costal margin including the base and the anterior 



parts of cells R and Ri ; male hypopygium having the ninth tergite with 



a broad depressed median lobe T. sayi (p. 406). 



Wings with the brown costal margin including cells and 8c only ; male 



hypopygium having the ninth tergite with a medium notch 



T. cunctans (p. 404). 



15. Wings strongly tinged with yellow ; a brownish cloud at the end of vein 



second A; male hypopygium with the sclerites of the ninth segment fused 



into a continuous ring and the tergal region notched medially 



T. Mltiina (p. 407). 



Wings without a strong yellowish tinge; if suffused with yellowish, no 



brown cloud at end of vein second A 16. 



16. Wings spotted, banded, clouded or tipped with brown or gray 17. 



Wings unicolorous hyaline, yellowish or dark brown ; in many cases, how- 

 ever, with the stigmal spot present ; usually a pale, vitreous obliterative 

 streak at or before the cord, extending from before the stigma to the 

 region of cell first M2 or beyond ; in some cases the costal region is a little 

 darkened, and perhaps a vitreous spot beyond the stigma in the base of 

 cell R2 29. 



