C. G. Iioran Station* Sand Island, Johnston Island Atoll 
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seen before. It is very dark and is quite heavyset (not an oribatid). 
After a few light shearers we all proceeded to the East end to 
observe the effects of the leg color markers on the Sooty Terns. 
We could easily see the marked birds from a distance. They seemed to 
De hazing no difficulty in walking and only one was seen pulling at 
the markers. It was noted that one might have -difficulty in seeing 
the marker vh en viewing the bird from its right side -while it is 
flying. 
Tlie Gray-backed Tern chick which appeared to be hatching; on 
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the fist was checked and found dead. It didn’t get out of the shell. 
/in immature Sooty Tern was killed and checked for ectoparasites. 
.An haportant find was the discovery of a few shaft feather mites on 
this young bird. Ilo colony had started inside any shaft, but one 
mite whs found lying (facing dowm-fard) in the grave above the 
superior usio Ulcus * (A) • /mother mite was di s c over ed burrowing into 
t-Ai snaft <3ust aoove the superior umbilicus . The hole was in the 
center of the grave and the ralto was entering laterally (B). 
