THe CrRANE-Furrs oF NEw YorkK — Part I] 893 
The immature stages of the known species are spent in decaying vege- 
table matter, manure, or decaying fungi (R. maculata, R. domestica), in 
decaying wood or beneath the loose bark of trees (R. wniseriata, R. fidelis, 
R. bryanti), or perhaps in aquatic situations (R. maculata, according to 
Needham). 
The following key divides the local species of the genus: 
1. Wings with an abundant pale brown or gray dotting in all the cells................... 2 
Wings with the markings larger and confined to the vicinity of the veins............. 3 
2. Body coloration grayish, the prescutum with a broad black median line; postnotum 
gray; wings with a heavy brown pattern along the costal margin, the marks about 
equal to the interspaces; legs brown; male antennae bipectinate. [Syst. Beschr., 
WOM paloo ply onesie 1818s (Plate XoXo, 36:)) 72 R. maculata Meig. 
Body coloration yellowish brown, the prescutum without a broad black median line; 
postnotum black; wings with small black spots at the base, the subcostal cross-vein, 
the origin of the sector, and the stigma, these marks much smaller than the interspaces; 
legs yellow; male antennae subpectinate. [Proc. Acad. Nat. Sci. Phila., p. 581, pl. 27, 
room 3 eal OI AN Fen (late eee Tes BO) cel one hall pale Co en Mc Y i Ran Si | R. shannoni Alex. 
3. Prescutum reddish brown with narrow black lines; pleura dull yellow with two narrow 
blackish longitudinal stripes; antennae with segments 12 and 13 light yellowish; basal 
deflection of Cw: usually far before the fork of M; antennae of the male subpectinate. 
[Proc. Acad. Nat. Sci. Phila., p. 208, pl. 3, figs. 8,9. 1859.) (Plate XXXII, 40.) 
R. domestica O. S. 
Prescutum gray with a broad black median line; pleura grayish or plumbeous, unstriped; 
antennae black thruout; basal deflection of Cw at the fork of M; antennae of the male 
TIO LESW DWE CUUMEALC Mem ume nena ami ieriale ole wuciueeslUccn( ania ite ieiigada Males LUI ents OME fas ole 4 
4. Wings with the dark pattern beyond the origin of the sector only, a large rounded cloud 
at the origin and fork of the sector, the large rectangular stigma and the radial cells 
largely darkened; abdomen dark brown, the genitalia reddish yellow; antennae of 
the male unipectinate. [Proc. Acad. Nat. Sci. Phila., p. 209. 1859.] - (Plate XXXII, 
SiS),)) 2 3 0 ¥ 0 6'0:01b.5/8 BASES EOE NOT UI BRE se are orien an bes so Rederiet eed R. fidelis O. 8. 
Wings with a series of about five large grayish brown blotches along the costal margin, 
two before the origin of the sector; abdominal tergites yellow, the caudal half of each 
segment dark brown; antennae of the male bipectinate. [Proc. Boston Soc. Nat. 
Hist., vol. 34, p. 128, 124, pl. 16, fig. 20. 1909.] (Plate XXXII, 37.)..R. bryanti Johns. 
R. domestica and R. shannoni are more southern in their distribution, 
R. fidelis and R. maculata more northern. Some of the species have 
a very extensive geographical range, R. domestica and its races occurring 
from Alaska to Argentina, and R. maculata being found thruout northern 
Europe and North America. 
Genus Dicranomyia Stephens 
1829 Dicranomyia Steph. Cat. Brit. Ins., vol. 2, p. 248. 
1830 Siagona Meig. Syst. Beschr.. vol. 6, plate 65, fig. 7. 
1854 Numantia Bigot. Ann. Soc. Ent. France, ser. 3, vol. 2, p. 470. 
Dicranomyia is one of the largest of the crane-fly genera, there being 
from one hundred and eighty to one hundred and ninety described species, 
