THe CRANE-FLIES oF New YorK— Part I 927 
Genus Phalacrocera Schiner 
1863 Phalacrocera Schin. Wien. Ent. Monatschr., vol. 7, p. 224. 
‘The small genus Phalacrocera includes but three described species — 
two North American and one European. They are of especial interest 
because of certain venat.onal features which they possess and which aid 
materially in explaining the remarkable venation of the more specialized 
species of Cylindrotominae (p. 863). The larva is aquatic, living on 
submerged plants. It is greenish brown in color, and the body is pro- 
vided with numerous long, flexib e filaments which are quite unlike the 
spiny armature of the more specialized members of the subfamily. 
The species are northern in their distribution and are most frequently 
found in bogs and boggy meadows. ‘The local species may be separated 
by the following key: 
Vein R. present and persistent to the wing margin; wings dark brown. [Proc. Acad. 
Nat. Sci. Phila., p. 603-605, pl. 25, fig. 10. 1914.] (Plate XXX, 9.)...P. neoxena Alex. 
Vein R: lost by atrophy; wings grayish brown. [Proc. Ent. Soc. Phila., vol. 4, p. 241. 
SOS .I| « CPllenlie DOROS Shs) a lal a ee esa ea ge ee Ga le P. tupulina 9.8. 
Genus Cylindrotoma Macquart 
1834 Cylindrotoma Macq. Suit. 4 Buff., vol. 1, Hist. Nat. Ins., Dipt., p. 107. 
The genus Cylindrotoma forms a small group of crane-flies, including 
two European and three North American species. They are all similar 
in color, being usually bright yellow with black stripes on the thorax, 
in this respect suggesting some species of Nephrotoma. The larvae live 
on the lower side of the leaves of various monocotyledonous and dicoty- 
ledonous plants such as Allium, Anemone, Trautvetteria, Stellaria, and 
Viola, the insect feeding on the leaf tissue. The larvae are green in 
color and are usually provided with fleshy points and processes. 
The following key divides the local species of Cylindrotoma: 
Tarsi dark brown. [Proc. Ent. Soc. Phila., vol. 4, p. 236. 1865.] (Plate XXX, 6.) 
C. americana O. 8. 
Tarsi yellow. [C. tarsalis Johns., Psyche, vol. 19, p. 2, fig. 4, 1912. C. anomala Johns., 
ESychemvollOnpy 2-3. fie. .3, 1912.) (Plate XO@X, 7). i. ee C. tarsalis Johns. 
Genus Liogma Osten Sacken 
1869 Liogma O.S. Mon. Dipt. N. Amer., part 4, p. 298. 
In the genus Liogma there are three described species, all occurring 
in the North Temperate Zone. The coloration of the adult flies is 
