Figures 537-544. — Nemorimyza posticata : 537, Aedeagus, 
side view; 538, same, ventral view; 539, leaf mine 
on Solidago . 540, Lunules of Cerodontha subgenera: 
Poemyza (A), Butomomyza ( B ) , Dizygomyza ( C) . C. 
( Icteromyza ) capitata : 541, Aedeagus, side view; £. 
( I. ) montanoides : 542, Aedeagus, side view; 543, 
distiphallus , ventral view; C. (_I. ) longipennis : 
544, Aedeagus, side view. 
390 
