904 CHARLES PauL ALEXANDER 
occur alongrunning streams (7. vernalis [O. S.]) or near cliffs (7. auripennis 
[O. S.]). 
The immature stages of the known species are usually spent in moist 
earth. In Europe, 7. immaculata (Meig.) was reared by Beling (1879:47) 
from larvae taken beneath decaying vegetable mold in the bed of a 
dried-up woodland stream. Other specimens were found in old horse 
manure in beech woods. De Meijere (1916:195-196) found the same 
species in decaying leaves and other vegetable matter in wet spots near 
the banks of streams. 7’. schinerz (Kol.) was found on August 19 in a 
wet spot in beech woods, where the larvae were associated with pupae 
of Pedicia rivosa in damp earth beneath ‘débris, adults emerging on 
September 6 and i2 (Beling, 1879:47). The only American species 
whose immature stages have been found is 7. inconstans, described 
herein. 
Tricyphona immaculata (Meig.), the genotype, as described by De 
Meijere in the paper cited above, differs from T. inconstans as herein 
described in the following points: The antenna bears a very short terminal 
papilla instead of the two very long ones in the local species. The small 
lateral tooth on the mentum is not mentioned nor figured as appearing 
in T. immaculata. The anal gills are short and with but a single con- 
striction. The pupa has the pronotal breathing horns small, kidney- 
shaped, the outer margin rounded. The fore legs are a little shorter than 
the middle legs, and these in turn are somewhat shorter than the posterior 
legs. The skin of the abdomen is very delicate, with crossrows of very 
small spicules, arranged in numerous irregular transverse rows, at the 
posterior margins of the segments, about seven such crossrows being 
present. 
Tricyphona inconstans (O. 8.) 
1859 Amalopis inconstans 0. S. Proc. Acad. Nat. Sci. Phila., p. 247. 
Tricyphona inconstans is an abundant species thruout eastern Nort 
America. It has been recorded also from Europe, but the latter record 
are almost certainly erroneous. The writer found larvae of this specie 
in rich mud at Larch Meadows, near Ithaca, New York, on May 15 
1917, in association with larvae of Rhamphidia mainensis, Pseudolimnophil 
luterpennis, and P. inornata. Adults emerged on May 27, 1917 (No 
52-1917). An account of the association in which these larvae occurre 
