The Crane-Flies of New York — Part I 895 



14. Halteres elongated (northern species). [Mon. Dipt. N. Amer., part 4, p. 71. 1869.] 



(Plate XXXI, 18.) D. halterata 0. S. 



Halteres short, of normal length 15 



15. Prescutum reddish brown, with a narrow paler median line. [Joum. N. Y. Ent. Sec, 



vol. 8, p. 184, pi. 7, fig. 6. 1900.] D. brunnea Doane 



Prescutum dark brown with yellow and brown stripes. [Proc. Acad. Nat. Sci. Phila., 

 p. 211. 1859.] D. distans 0. S. 



16. Coloration gray, the prescutum with a broad median brown stripe; a narrow brown 



seam on cross- vein r. [Proc. Acad. Nat. Sci. Phila., p. 209, pi. 3, figs. 4, 4a. 1859.] 



(Plate XXXI, 21.) D. liberta O. S. 



Coloration brown or yellowish brown ; no narrow brown seam on cross- vein r 17 



17. Basal deflection of Mi+2, forming the inner end of cell 1st Mi, arcuated so that cells 



1st M2 and Ri are almost on a line. [Proc. Acad. Nat. Sci. Phila., p. 210. 



1859.] D. stulta O. S. 



Basal deflection of Mi-f-2 not conspicuously arcuated, cell 1st Mi being conspicuously more 

 distant from the wing base than cell Rs 18 



18. Thorax brown, with three blackish stripes on the prescutum which are confluent, the 



lateral ones running caudad onto the scutal lobes; wings hyaline, unmarked. [Furco- 

 myia monticola Alex. Psyche, vol. 18, p. 201-202, pi. 16, fig. 7. 1911.] (Plate 



XXXI, 19.) D. monticola (Alex.) 



{Dicranomyia monticola may not be distinct from D. stulta, which appears to be a 

 somewhat variable species.) 

 Thorax not so marked; wings with a grayish or brownish tinge 19 



19. Thorax brownish yellow, with a darker brown median stripe; antennae black. [Mon, 



Dipt. N. Amer., part 4, p. 70-71, pi. 1, fig. 3. 1869.] (Plate XXXI, 17.) 



D. haeretica O. S. 



Thorax light brown without a distinct darker median stripe; antennae reddish brown. 



[Journ. N. Y. Ent. Soc, vol. 8, p. 184, pi. 7, fig. 8. 1900.] D. moniliformis Doane 



20. Wings spotted with darker 21 



Wings unmarked, except for the stigmal spot when it occurs 22 



21. Wings with brown dots in all the cells; femora with a yellowish ring before the tip. 



[Limnobia simulans Walk. List Dipt. Brit. Mus., vol. 1, p. 45. 1848. J (Plate 



XXXI, 24.) D. simulans (Walk.) 



Wings with three large brown spots along the costa, the first at the origin of the sector, 

 the second at the tip of Sc, and the third at the tip of Ri; wings grayish brown, paler 

 near the stigma; cord and outer end of cell 1st M2 seamed with dark brown; femora 

 without a yellowish ring before the tip. [Mon. Dipt. N. Amer., part 4, p. 75. 1869.] 

 (Plate XXXI, 25.) D. rara 0. S. 



22. Wings with a distinct pubescence in the apical cells. [Proc. Acad. Nat. Sci. Phila., 



p. 211. 1859.] (Plate XXXI, 28.) D. pubipennis 0. S. 



Wings glabrous on all the cells 23 



23. No stigmal spot nor brown seams to the veins; Ri strongly curved toward R2+3 at the 



tip; tarsi brown. [Mon. Dipt. N. Amer., part 4, p. 74. 1869.] (Plate XXXI, 27.) 



D. globithorax O. S. 



Stigma evident, dark brown; paler brown seams to the cord and the outer end of cell 



1st M2; R\ not incurved toward R2+3; tarsi whitish. [Can. Ent., vol. 48, p. 42-43. 



1916.] (Plate XXXI, 26.) D. macateei Alex. 



Genus Limnobia Meigen 



1800 Amphinome Meig. Nouv. Class. ]\Touch., p. 15 (nomen nudum). 



1803 Limonia Meig. Illiger's Mag., vol. 2, p. 2(52. 



1818 lAmnobia Meig. Syst. Beschr., vol. 1, p. 116. 



1856 Limnomyza Rond. Prodromus, vol. 1, p. 185. 



