THe CRANE-FLIES or New YorkK— Part I 911 
Genus Ormosia Rondani 
1856 Ormosia Rond. Prodromus, vol. 1, p. 180. 
1856 Ilisomyia Rond. Prodromus, vol. 1, p. 180. 
1860 Rhypholophus 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: 
ipaanesispottedor clouded! withidarker, (J...) e-0. Gy ee heen Pele bees, 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 
DlOtCbesmarte eee. Se aa een a eee used apa ea Ay EDEN pS lei TNR ae oR cee ete 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. 8. Mon. Dipt. 
N. Amer., part 4, p. 142. 1869.] (Plate XXXIV, 56.)........... O. innocens (O. 8.) 
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, pl. 16, fig. 6. 1911.] 
(J2leHi@ DORIS, NGI) is el ee ec isA eree erIPeLE i ar San LU ai LU O. apicalis Alex. 
(O. atriceps Dietz [Trans. Amer. Ent. Soc., vol. 42, p. 136-137, pl. 10, figs. 1 and 2, 
1916] is apparently too close to O. apicalis to be separated therefrom.) 
4, An indistinct crossband along the cord. [Hrioptera fascipennis Zett. Ins. Lapponica, 
ID MON, [D5 SRNL, TSR ast aie iateee Lennar ate stellt cles rt eee ear eee O. fascipennis (Zett.) 
Wings with three or four indistinct grayish crossbands. [Hrioptera nubila O. S. Proce. 
Acad. Nat. Sci. Phila., p, 227. 1859.] (Plate XXXIV, 54.)........ O. nubila (O. S.) 
Pomm@ellmisheViy ClOSeMi 2). Ss clac ss le cles a os Ae ee Set ON MEU HES ACHR rE A Ae 6 
Ce lP sa VEMO eT ie coat unio Lat easy es LU ge carl a Ean ur Neat aie ole Mink RAR 10 
PNT VL SRO VETO MG Re ii ein eipelate hs Soke ego MH eay cu tn ee SR Ta ee oars et cpr een Le 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 entirely brown; thorax reddish brown, shining; basal deflection of Cu: under 
the middle of cell 1st M2. [Trans. Amer. Ent. Soc., vol. 42, p. 137-138, pl. 10, fig. 3. 
TIDIIGs|t-. 0 0 dro. cGIiS sara eta aie NSE a Eh CUR ILE AE Ra ea den sacar orp O. abnormis Dietz 
Not colored as above; basal deflection of Cw before or at the fork of M............. 8 
8. Entire thorax and coxae yellowish red; antennae pale yellowish, darkened toward the 
tip. [Trans. Amer. Ent. Soc., vol. 42, p. 138-139, pl. 10, fig. 4. 1916.] 
O. luteola Dietz 
MOLE O LACOLOLEA LAS VAD OVE 2 oc a4e csovs eietaeasternr syste tere oie ADS Raeytlel siecle Hats Reale inn Means ae 9 
9. Mesonotum reddish with a median brown line which in some cases is indistinct; antennae 
pale thruout or with only the extreme tip darkened. [Trimicra pygmaea Alex. Psyche, 
VOOM paloO pls Tounie. o-) LOZ |) \CRlate XOxoxaVi, 583). 25). 5. O. pygmaea (Alex.) 
(O. pilosa Dietz is the same as O. pygmaea.) 
Mesonotum brownish gray; the four basal antennal segments yellow. [Rhypholophus 
nigripilus O.S. Mon. Dipt. N. Amer., part 4, p. 142. 1869.] (Plate XXXIV, 57.) 
O. nigripila (O. 8.) 
10. Medial cross-vein lacking, cell 1st M2 confluent with cell M2....................... 11 
Outer deflection of M; lacking, cell /st M2 confluent with cell M;................... 12 
