826 - CHARLES PAauL ALEXANDER 
acter, the pectinate antennae of the male, and several of the species 
run inconveniently close to Dicranomyia. 
The immature stages are spent beneath the bark of decaying trees or 
in decaying vegetable or animal matter. In Europe the genotype, 
Rhipidia maculata Meig., has been recorded as living in old cow-manure. 
Beling found the insects in such a situation, associated with the larvae 
of Rhyphus punctatus (Fabr.) (Beling, 1879:52-53) and a staphylinid— 
beetle, Platystethus morsitans Payk. (Beling, 1873b:592). R. uniseriata 
Schin. was found by Beling (1879 :53-54) living in decaying beech wood, 
in company with larvae of Xylota lenta Meig. and X. segnis (Linn.) (Syr- 
phidae) as well as with larvae of a tipuline crane-fly, Ctenophora. The 
larvae of this species, like those of R. maculata, live in thin silken cases, 
open at both ends and covered with particles of wood and other débris. 
In America, besides Rhipidia bryanti (which is discussed in some detail) 
the following records of the immature stages are available: Rhipidia 
maculata, recorded in Europe as living in decaying organic matter, was 
found by Needham (19082:170, 204) in tent traps set over the bed of 
Beaver Meadow Brook in the Adirondacks, the insects presumably hav- 
ing emerged from the stream bed or from the thin layers of moss covering 
theexposed stones. R. fidelis O. 8. was reared from larvae in decaying wood 
near Ithaca, New York, by Carl Ilg. This species belongs to the same 
subgenus (Monorhipidia Alex.) as the European R. wniseriata, which has 
similar larval habits. R. domestica O. S. has been bred from larvae 
obtained in fermented sap of the sour gum (Nyssa sylvatica Marsh., 
Cornaceae) at Clementon, New Jersey (Johnson, 1910:704). Males and 
females of this species were bred by Popenoe at Washington, D. C., 
from larvae on more or less decaying roots of taro (Colocasia antiquorum 
Schott, Araceae) taken at Gough, South Carolina, on February 1, 1911. 
Specimens of Rk. domestica emerged on August 21, 1906, at Juneau, 
Alaska, in radishes infested with Hylemyia brassicae (Bouché). 
Rhipidia (Rhipidia) bryanti Johns. 
1909 Rhipidia bryanti Johns. Proc. Boston Soc. Nat. Hist., vol. 34, p. 123-124, pl. 16, 
fig. 20. 
Rhipidia bryanti is one of the largest and handsomest species of the 
genus, and is widely distributed thruout the eastern United States from 
Maine to Texas. The immature stages are spent beneath the decaying 
