946 Charles Paul Alexander 



26. Male hypopygium with the ninth tergito (Phite L, 287) produced caudad into a com- 



pressed median lobe; antennae elongate, bicolorous; wings with an extensive brownish 

 gray blotch before the cord, occupying the ends of cells R and M and the lower basal 

 angle of cell Cui; a broad cloud on the petiole of cell Afi; prescutum light gray, with 

 four broad dark gray stripes. [T. hennannia Alex., Proc. Acad. Nat. Sci. Phila., 

 p. 4S0, 1915. T.fasciata Loew, preoccupied, Berl. Ent. Ztschr., vol. 7, p. 279, 1863.] 

 (Plate XLV, 211, wing; Plate LIV, 343, lateral aspect of male hypopygium.) 



T. hermannia Alex. 

 Male hypopygium not as above 27 



27. Wings with a pale gray tinge, more brownish in cell M along vein Cu; hyaline spots in the 



anal cells, at two-thirds the length of cell Mi, before the stigma, and an interrupted 

 band before the cord extending to cell 1st Mr, body coloration gray, the pre.'^cutum 

 with four dark brown stripes; male hypopygium small, not conspicuously elongated 



or enlarged [marmorata group) 28 



Wings brown or dark gray, with a pattern of white or hyaline spots and blotches .... 29 



28. Stripes on the prescutum ending at the level of the pseudosutural foveae, the median 



pair blunt at their anterior ends; apical tergites of the abdomen not conspicuously 

 darkened. [Berl. Ent.- Ztschr., vol. 7, p. 279. 1863.] (Plate XLVIII, 250, wing; 

 the figure is much darker than in normal specimens. Plate LI, 297, ninth tergite.) 



T.fragilis Loew 

 Median stripes of the prescutum extending about to the anterior margin of the .sclerite, 

 deeply bifid at the anterior end; apical segments of the abdomen largely blackish. 

 [Berl. Ent. Ztschr., vol. 7, p. 280. 1863.] (Plate LI, 298, ninth tergite.) 



T. ignobilis Loew 



29. Male hypopygium with the ninth segment elongate-cylindrical, strongly upturned; 



eighth sternite with the caudal margin tripartite and clothed with yellow hairs; wings 



with a variegated brown, gray, and white pattern {hehes group) 30 



Male hypopygium with the ninth segment not strongly upturned 33 



30. Antennae elongated in the male, extending about to the base of the abdomen 31 



Antennae short in both sexes, extending about to the wing root 32 



31. Antennal flagellum bicolorous; bladelike processes of the male hypopygium not elongated 



nor spiraliform. [Berl. Ent. Ztschr., vol. 7, p. 285. 1863.] (Plate XLVIII, 249, 



wing.) T. hehes Loew 



Antennal flagellum uniform dark brown, at least apically; bladelike processes of the 

 male hypopygium elongate, spiraliform. [Berl. Ent. Ztschr., vol. 8, p. 60. 1864.] 



(Plate LI, 293, ninth tergite.) T. latipennis Loew 



{T. ottawaensis Dietz is the same as T. latipennis Loew.) 



32. Antennal flagellum yellowish brown; appendiculate process of the male hypopygium 



slender and pointed apically. [Berl. Ent. Ztschr., vol. 7, p. 281. 1863.] (Plate LI, 



292, ninth tergite.) ,T. grata Loew 



Antennal flagellum dark brown; appendiculate process of the male hypopygium broad, 

 obtusely pointed at the apex. [T. afflida Dietz, Trans. Amer. Ent. Soc, vol. 40, 

 p. 351-352, pi. 13, figs. 5, 6, pi. 14, fig. 2, 1914, as T. suspecta Dietz.] . . T. afflicta Dietz 

 {T. afflicta Dietz is close to T. grata Loew but apparently separable from it.) 



33. Wing with four large brown subequidistant blotches along the radial vein, the second 



at the origin of the sector, the fourth on vein lis; male hypopygium with the ninth 

 pleurite greatly produced into slender, chitinized, digitiform processes {macrolabis 



group) 34 



Wings variously marked but without four large brown subequidistant blotches along 

 the radial vein; male hypopygium with the ninth pleurite not greatly produced. . . .35 



34. Ninth tergite (Plate LI, 295) rather squarely truncated across the caudal margin, with 



a sharp median tooth; apex of the ninth pleurite ending in acute teeth (Plate LIII, 

 322). Northeastern North America. [Berl. Ent. Ztschr., vol. 8, p. 58. 1864.] 

 (Plate XLVII, 233, wing; the brown blotches along R do not show clearly in the 

 figure.) T. macrolabis Loew 



