Explanation of Plate XXI, 
Fig. 1. Two pairs of palpi of G. rubi and one pair of C. avis x 13. 
The differences are obvious. One pair of the C. rubi are more 
denuded of scales than the other. 
Fig. 2. Terminal abdominal segments of C. avis 9, opened dorsally 
and spread, x 18. 
A portion of the same specimen is shown on Plate XXII. 
