The Crane-Flies of New York — Part I 945 



17. Wings spotted, banded, clouded, or tipped with brown or gray 18 



Wings unicolorous — ^ hyaline, yellowish, or dark brown, in many cases, however, with 



the stigmal spot present; usually with a pale vitreous obliterative streak at or before 

 the cord, extending from before the stigma to the region of cell 1st M2 or beyond; 

 in some cases the costal region a little darkened, and perhaps a vitreous spot beyond 

 the stigma in the base of cell Ri 68 



18. Tip of vein Ri atrophied 19 



Tip of vein Rz present, reaching the wing margin 20 



19. Wings long and narrow, in the male 14 mm. long; cell 1st Mt elongate, as long as or 



longer than cell Mr, blotch at the origin of the sector connected with the blotches in 

 cell R. [Berl. Ent. Ztschr., vol. 7, p. 282. 1863.] (Plate XLVIII, 248, wing.) 



T. suhfasciata Loew 

 Wings short and broad, in the male 11.6 mm. long; cell 1st M-i short and broad, about 

 two-thirds the length of cell Mr, a small brown spot at the origin of the sector; a dark 

 spot at the base of the wing. [Proc. Acad. Nat. Sci. Phila., p. 472-474, pi. 16, fig. 4. 

 1915.] (Plate XLVIII, 247, wing; Plate L, 275, ninth tergite; Plate LIII, 334, lateral 

 aspect of male hypopygium.) T. penobscot Alex. 



20. Wings with the apex broadly dark brown, extending from the outer end of cell R2 to 



the end of cell Mr, no brown markings proximad of the cord; body coloration yellowish 

 brown; scape of the antennae bright yellow; wing under 15 mm. [Berl. Ent. Ztschr., 

 vol. 7, p. 277. 1863.] (Plate XLVIII, 254, wing; Plate LI, 302, ninth tergite; Plate 



LIV, 342, lateral aspect of male hypopygium.) T. apicalis Loew 



Wings with the dark markings not confined to the apex, or if the tip is darkened the 

 coloration of the body is gray and the scape of the antenna is dark brown {T. iroqiiois) 

 or the size of the fly is larger {valida group, wings over 18 mm.) 21 



21. Wings banded brown and white, with a broad, uninterrupted white crossband beyond 



the stigma, extending from the end of cell 2d Ri to the middle of cell Mt, or beyond 



to the wing margin 22 



Wings without an uninterrupted white crossband beyond the stigma 23 



22. Smaller species, wing of male less than 15 mm.; antennal flagellum bicolorous; thorax 



gray with four broad brownish stripes; wings with the white fasciae narrow; male 

 hypopygium with the ninth tergite (Plate LI, 291) narrowlv notched medially. 

 [Berl. Ent. Ztschr., vol. 8, p. 61. 1864.] (Plate LIV, 340, lateral aspect of male 



hypopygium.) T. angulata Loew 



Larger, wing of male over 15 mm.; antennal flagellum unicolorous; thorax gray with 

 an interrupted pattern of dots and narrow brown Hnes; wings with the white fasciae 

 broad, the basal one especially broad; male hypopygium with the ninth tergite (Plate 

 LI, 294) broadly and shallowly notched caudally, bearing a more or less bifurcate 

 median tooth. [Journ. Acad. Nat. Sci. Phila., vol. 3, p. 26. 1823.] (Plate XLVI, 

 226, wing.) T. trivittata Say 



23. Large, length of male over 25 mm.; vertex light yellow; thoracic dorsum with a velvety 



black pattern margined with paler, producing an ocellate appearance; abdominal 

 tergites bright orange with a broad brownish black stripe on either side; segments 

 7 to 9 dark brownish black. [Ctenophora abdominalis Say. Journ. Acad. Nat. Sci. 

 Phila., vol. 3, p. 18. 1823.] (Plate XLV, 210, wing; Plate LI, 299, ninth tergite.) 



T. abdominalis (Say) 

 Smaller, length of male under 20 mm. ; not colored as above 24 



24. Males (as known) 25 



Females (as known) '. 49 



25. Coloration bright orange, the thoracic dorsum without darker stripes; wings yellowish 



basally, more clouded with brown apically; a small brown spot at the base of the wing 

 and another at the origin of the sector; antennae bicolorous; male hypopygium 

 asymmetrical, the right pleurite produced caudad into a prominent two-cleft arm. 

 [Ctenophora fuUginosa Say. Journ. Acad. Nat. Sci. Phila., vol. 3, p. 18. 1823.] 

 (Plate XLVIII, 245, wing of male; Plate LI, 289, ninth tergite.).. . T. fuUginosa (Say) 

 Coloration not as above 26 



