Bui. 842, U. S. Dept. of Agriculture. 
Plate VI. 
\ 
7 
:J / m 
U- s — 
B 
Larwe of Tylenchus tritici. 
A, Photomicrograph of an unstained cross section, 15 m in thickness, of a nematode flower 
gall, showing larvie in the center unattached to the inclosing host walls. X 37. B, 
Photomicrograph of active larvae from a flower gall moving in a drop of water. Note 
their transparent anterior ends and their tapering, slightly pointed posterior ends. 
X30. 
