The Crane-Flies of New York — Part I 905 



known are spent in wet earth or sand, and the larvae are of the usual 

 elongate type of the Eriopterini. 



The local species of Gonomyia may be separated according to the 

 following key: 



1. Two branches of the radial sector reaching the wing margin. (Subgenus Leiponeura 



Skuse.) 2 



Three branches of the radial sector reaching the wing margin.) Subgenus Gonomyia 

 Meig.) 4 



2. Outer deflection of vein Mi absent, the cell 1st M-i being open; costa conspicuously china- 



white; legs banded with white. [Elliptera alexanderi Johns. Psyche, vol. 19, p 3, 



fig. 6. 1912.] (Plate XXXVI, 86.) G. aleranderi (Johns.) 



Outer deflection of vein Ms present, closing the cell 1st Mi; costa not china-white; legs 

 not banded with white 3 



3. Pleural stripes conspicuous; stigma of the wings distinct; femora tipped with dark brown. 



[Proc. Acad. Nat. Sci. Phila., p. 587-588; pi. 27, fig. 25, wing; pi. 26, fig. 21, hypopygium. 



1914.] (Plate XXXVI, 87.) G. sncandaga Alex. 



Pleural stripes lacking; no stigmal spot on the wings; femora not tipped with brown. 

 [Goniomyia manca O. S. Mon. Dipt. N. Amer., part 4, p. 178-179. 1869.] (PlaLe 

 XXXVI, 88.) G. manca (O. S.) 



4. Basal deflection of Cui far before the fork of M; subcosta long, ending beyond the origin 



of the sector 5 



Basal deflection of Cui at or beyond the fork of M; subcosta short, ending opposite or 

 before the origin of the sector 6 



5. Wings clear, unspotted. [Ent. News, vol. 26, p. 170-172, figs. 1-3. 1915.) (Plate 



XXXVI, 89.) G. mathesoni Alex. 



Wings spotted. [Proc. Acad. Nat. Sci. Phila., p. 231, pi. 4, fig. 16. 1859.] (Plate XXXVI, 

 90.) G. blanda O. S. 



6. Antennae orange at the base, the flagellura dark 7 



Antennae black thruout 9 



7. Cell Isl Ml closed; femora with a dark brown subterminal ring. [Proc. Acad. Nat. Sci. 



Phila., p. 230. 1859.] (Plate XXXVI, 91.) G. sulphnrella O. S. 



Cell 1st M2 open; femora without a dark subterminal ring 8 



8. Male hypopygium with the dorsal angle of the pleurite stout, with numerous (about 15) 



slender hairs; ventral appendage simple, stout, tipped with a blunt black spine; second 

 appendage a powerful, curved, subchitinized arm directed proximad. [Can. Ent. 



vol. 48, p. 316-317. 1916.] (Plate XXXVI, 92.) G. florens Alex. 



Male hypopygium with the dorsal angle of the pleurite slender, with a few (about 10) 

 stout hairs; ventral appendage bifid, the arm with a long, slender, black spine at the 

 tip; second appendage a slender, pale arm that is almost straight, and with two hairs 

 at the tip. [Proc. Acad. Nat. Sci. Phila., p. 230, pi. 4, fig. 17. 1859.] (Plate 

 XXXVI, 93.) G. cognatella O. S. 



9. Subcosta short, ending before the origin of the sector, the distance between its tip and 



the origin of the sector being about equal to the r-7n cross- vein; vein Rz oblique, a little 

 longer than the r-m cross- vein; male hypopygium with the gonapophyses and the penis 

 guard fused into a large, prominent, cylindrical tube: thoracic pleura indistinctly striped. 

 [Can. Ent., vol. 48, p. 319-320. 1916.] (Plate XXXVI, 94.] . . .G. novehoracensis Alex. 

 Subcosta longer, ending about opposite the origin of the sector; vein fi. elongate; male 

 hypopygium with the gonapophyses and the penis guard not fused into a cylindrical 

 tube; thoracic pleura without stripes. [Proc. Acad. Nat. Sci. Phila., p. 231. 1859.] 

 (Plate XXXVI, 95.) G. subcinerea O. S. 



The above key is adapted from a revision of the American species of 

 the genus by the author (Alexander, 1916:508-528). 



