The Crane-Flies of New York — Part I 935 



being the ones that have been removed from Nephrotoma and referred 

 to Tipula on other characters. The immature stages of the known species 

 are spent in moist eartlT and in decaying wood. 



The local species of Nephrotoma may be separated in accordance with 

 the following key: 



1. Thoracic stripes black or lareiely black 2 



Thoracic stripes, if present, brownish or reddish. . 8 



2. Prescutura with the anterior lateral angles of the lateral stripes and the ends of the 



V-shaped suture deep velvety black; pleura with faint, reddish markings. [Pachyrrhina 



virescens Loew. Berl. Ent. Ztschr., vol. 8, p. 62. 1SG4.] A'', virescens (Loew) 



Prescutum with the stripes uniform black thruout 3 



3. Wings with the ground color hyaline 4 



Wings strongly tinged with brown or dusky, at least basally 6 



4. Lateral stripes on prescutum curved laterad at their anterior ends. [Pachyrrhina 



incurva Loew. Berl. Ent. Ztschr., vol. 7, p. 293. 1863.] (Plate XLIV, 204.) 



N. incurva (Loew) 

 Lateral stripes on prescutum straight 5 



5. A small black spot on the vertex between the antennal bases; wings tipped with brown; 



abdominal segments banded with black. [Pachyrrhina pedunculaia Loew. Berl. Ent. 



Ztschr., vol. 7, p. 293. 1863.] (Plate XLIV, 203.) N. pedunculata (Loew) 



No small black spot between the antennal bases; wings not tipped with darker; abdominal 

 segments trivittate, the lateral stripes interrupted, the median stripe continuous. 

 [Pachyrrhina vittuln Loew. Berl. Ent. Ztschr., vol. 8, p. 63. 1864.] 



N. vittula (Loew) 



6. Lateral stripes on prescutum curved laterad at their anterior ends. [Tipula lineata 



Scop. Ent. Carniol., p. 320. 1763.] N. lineata (Scop.) 



Lateral stripes on prescutum straight 7 



7. Prescutum with the ground color orange-yellow; scutellum and pleura mostly black; 



abdomen with black dorsal spots. [Pachyrrhina lugens Loew. Berl. Ent. Ztschr., 



vol. S, p. 63. 1864.] (Plate XLIV, 202.) N. lugens (Loew) 



Prescutum with the ground color obscure yellow; scutellum and pleura mostly yellow; 

 abdomen with a black dorso-median stripe. [Proc. Acad. Nat. Sci. Phila., p. 467-468, 

 pi. 16, fig. 1. 1915.] (Plate XLIV, 205.) A^ penumbra Ale.x. 



8. Thoracic dorsum dull, opaque; antennae of male very elongated, the flagellum black. 



[Tipula rnacrocera Say. Journ. Acad. Nat. Sci. Phila., vol. 3, p. 24. 1823.] (Plate 



XLIV, 200.) N. rnacrocera (Say) 



Thoracic dorsum more or less shiny; if at all opaque, the antennae of both sexes very 

 short 9 



9. Antennal segments uniform in color 10 



Antennal segments bicolorous 17 



10. A velvety black spot at the anterior end of the lateral prescutal stripe. [Pachyrrhina 



punctum Loew. Berl. Ent. Ztschr., vol. 7, p. 294. 1S63.] A'^. punclum (Loew) 



No velvety black spot at the anterior end of the lateral prescutal stripe 11 



11. Occiput opaque with a shining triangular spot in the middle 12 



Occiput shining 14 



12. A black spot at each end of the V-shaped suture. [Tipula ferruginea Fabr. Svst. 



Antl., p. 28. 1805.] (Plate XLIV, 198.) N. ferruginea (Fabr.) 



No black spots at the ends of the V-shaped suture 13 



13. Stigma pale, brownish yellow. [Pachyrrhina occipitalis Loew. Berl. Ent. Ztschr., 



vol. 8, p. 65. 1864.] A'', occipitalis (Loew) 



Stigma dark, blackish brown. [Pachyrrhina gracilicornis Loew. Berl. Ent. Ztschr., 

 vol. 8, p. 66. 1864.] A'', gracilicornis (Loew) 



