The Crane-Flies of New York — Part I 911 



Genus Ormosia Rondani 



1856 Ormosia Rond. Prodromus, vol. 1, p. ISO. 



1X56 Ilisomyia Rond. Prodromus, vol. 1, p. 180. 



1860 Rhypholovhus Kol. Wien. Ent. Monatschr., vol. 4, p. 393. 



1863 Dasyptera Schin. Wien. Ent. Monatschr., vol. 7, p. 221. 



The genus Ormosia includes about sixty-two described species, of 

 temperate zones, almost all occurring in the temperate regions of Europe 

 and North America. The immature stages are spent in mud and damp 

 earth. 



The local species of Ormosia may be separated in accordance with the 

 following key: 



1. Wings spotted or clouded with darker 2 



Wings unicolorous or nearly so, the stigma only being darker 5 



2. Anal veins divergent; wing markings produced by actual dark brown spots and 



blotches 3 



Anal veins convergent, the second anal vein before its tip bent strongly toward the 

 first; wing markings produced by dark-colored hairs on pale brown clouds 4 



3. Wings with brown dots in all the cells. [Rhypholophus innocens O. S. Mon. Dipt. 



N. Amer., part 4, p. 142. 1869.] (Plate XXXIV, 56.) 0. innocens (O. S.) 



Wings with three brown costal spots, the cord margined with brown, the base and the 

 apex of the wing darkened. [Psyche, vol. 18, p. 200-201, pi. 16, fig. 6. 1911.] 



(Plate XXXIV, 55.) 0. apicalis Alex. 



(0. ntriceps Dietz [Trans. Amer. Ent. Soc, vol. 42, p. 136-137, pi. 10, figs. 1 and 2, 

 19161 is apparently too close to 0. apicalis to be separated therefrom.) 



4. An indistinct crossband along the cord. [Erioptera fascipennis Zett. Ins. Lapponica, 



Dipt., p. 831. 1838.] O. fascipennis (Zett.) 



Wings with three or four indistinct grayish crossbands. [Erioptera nubila O. S. Proc. 

 Acad. Nat. Sci. Phila.,.p. 227. 1859.] (Plate XXXIV, 54.) 0. nubila (O. 8.) 



5. Cell 1st M; closed. 6 



Cell 1st M, open 10 



6. Anal veins divergent 7 



Second anal vein arcuated, before its tip bent strongly toward the first. [Rhypholophus 



arcuatus Doane. Ent. News, vol. 19, p. 201. 1908.] O. arcuata (Doane) 



7. Antennae entirelv brown; thorax reddish brown, shining; basal deflection of Cm under 



the middle of cell 1st M2. [Trans. Amer. Ent. Soc, vol. 42, p. 137-138, pi. 10, fig. 3. 



1916.] 0. abnorrnis Dietz 



Not colored as above; basal deflection of Cih before or at the fork of Af 8 



8. Entire thorax and coxae yellowish red; antemiae pale vellowish, darkened toward the 



tip. [Trans. Amer. Ent. Soc, vol. 42, p. 138-139, pi. 10, fig. 4. 1916.] 



O. luteola Dietz 

 Thorax not colored as above 9 



9. Mesonotum reddish with a median brown line which in some cases is indistinct; antennae 



pale thruout or with onlv the extreme tip darkened. [ Trimicra pygmaea Alex. Psyche, 



vol. 19, p. 166, pi. 13, fi^g. 3. 1912.] (Plate XXXIV. 58.) 0. pygmaea (Alex.) 



(0. pilosa Dietz is the same as 0. pygmaea.) 

 Mesonotum brownish gray; the four basal antennal segments yellow. [Rhypholophus 

 nigripilus 0. S. Mon. Dipt. N. Amer., part 4, p. 142. 1869.] (Plate XXXIV, 57.) 



0. nigripila (0. S.) 



10. Medial cross-vein lacking, cell 1st Mi confluent with cell Mi 11 



Outer deflection of Ms lacking, cell Isl Mz confluent with cell M.3 12 



