218 NEW YORK STATE MUSEUM 
course and are generally clearly recognizable. They will be desig- 
nated in this paper by ine following names and abbreviations for 
them: 
Costa (C) 
Subcosta (Sc) 
Radius (I) 
Media (1) 
Cubitus (Cw) 
Amal wens (in 4), ao. Al, 20! Al) 
On the accompanying diagram [fig. 11] of a crane fly wing these 
principal veins are designated at the base by the abbreviations given 
above. It will be observed that the radius is distinguished by the 
possession of avery large and conspicuous posterior branch. This 
branch is called the radial sector (fs). All other branches are 
IB, kT 
designated by number, the numbers beginning at the front and con- 
tinuing posteriorly, the number being added to the symbol for the 
vein, for any branch to which it belongs. For example the branches 
of the radial vein are labeled R1, R?, R*, R*, and R°. The costa 
is simple and lies on the foreborder of the wing. The subcosta 
is two branched and bears a short apical fork, but the divisions 
of this fork, running as they do into costa and radius respectively, — 
have usually the appearance of cross veins. The radius gives off 
its sector as already noted, and this in turn is dichotomously 
twice forked. Media likewise has a manner of forking essentially 
like that of the radial sector, and cubitus is once forked. Al- 
though the anal veins are usually simple, the second of them is 
occasionally forked at the tip. 
