139 
Fig.W—Phytoptus thuja} (ventral view.) a. rostrum; 
b, labium; c, chelicerm; d, appearance of joints 
seen on the rostrum; e, tarsal claw; /.feather¬ 
like tarsal appendage; g. one of the first pair of 
hairs on under sid^ of cephalothoax; h, one of 
the second pair of hairs on the under side of 
cephalothorax; i, genital plate: j, abdominal 
sucker. 
