The Crane-Flies of New York — Part I 



889 



the latter family and quite unlike the amphipneustic larvae of the 

 Rhyphidae. Until additional data are forthcoming they should be con- 

 sidered as being Mycetophilidae. 



Genus Mycetobia Meigen 



1818 Mycetobia Meig. Syst. Beschr., vol. 1, p. 229. 



Johannsen (1909) recognizes six recent species of Mycetobia, and five 

 others as fossil in Baltic amber (Eocene) . The larvae are found in decaying 



A B 



Fig. 132. wing venation in rhyphidae 

 A, Venation of typical Rhyphus. B, Venation of Mycetobia 



trees and in fermented sap in the wounds of trees. A single species is 

 known from New York State, Mycetobia divergens Walk. The charac- 

 teristic venation of the genus is shown in figure 132, b. 



Family Tipulidae 



The family Tipulidae includes almost all of the local crane-flies. It is 



divided into three subfamilies, two of which are further separable into 



nine tribes — six belonging to the Limnobiinae and three to the Tipulinae. 



The tribes may be separated as follows: 



1. Last segment of the palpi elongate, whiplash-like; nasus usually distinct; antennae usually 

 with 13 segments; Sc almost always ending in R; m-cu cross-vein present or obliterated 

 by the usually slight fusion of Cui on Ma+i. In the dolichopezine genus Brachypremna 

 (p. 928) Sc is very long and ends in the costa, and the fusion of Cui and Mi+t is often 

 extensive; but the antennae are 13-segmented, the palpi are elongated, the nasus is 

 distinct, and the whole appearance of the fly is decidedly tipuline. (Subfamily 



Tipulinae.) 2 



Last segment of the palpi short; no distinct nasus; antennae usually 14- or 16-segmented; 



Sc usually ending in costa but connected with R by Sci; m-cu cross-vein obliterated 



' by the long fusion of Cui on Mi+t. In Pedicia (p. 923^ the palpi are elongated, but 



all other characters are limnobiine. (Subfamilies Limnobiinae, Cylindrotominae.) ... .4 



