Pearse—On the Habits of Uca Pugnax. 
801 
early part of July; U. pugilator was copulating during the lat¬ 
ter part of July. 
3. High up on the beach the fiddler population is mostly 
males; lower down the sexes occur in approximately equal num¬ 
bers. 
4. Fiddlers usually close their burrows when the tide comes 
in and use two methods. On a hard bottom they pull a round 
piece of earth down over themselves ; on a soft bottom they 
plaster up the opening somewhat, then enter the burrow, and, 
after pulling the mud down with the legs, push up material 
from below. 
5. Male fiddlers try to induce females to come to them by 
waving their chelipeds, and then try to make them enter their 
burrows. 
6. Male fiddlers use the great chela as a weapon for combat 
and defense, and as a signal to attract the females. They do 
not use it as a stopper to their burrows, nor to dig, nor as a 
“nuptial couch” during copulation. 
BIBLIOGRAPHY. 
Alcock, A. 
1892. On the Habits of Gelasimus annulipes. Edw. Ann. 
& Mag. of Hat. Hist., (6) 10: 415-416. 
1902. A naturalist in Indian Seas, xxiv + 289 pp., 
1 map. 
Oalman, W. T. 
1911. The Life of Crustacea. Hew York, xvii & 289 pp. 
Chidester, F. E. 
1912. The Miating Habits of Four Species of Brachyura. 
Biol. Bull., 21: 235-248. 
Pearse, A. S. 
19,12. The Habits of Fiddler Crabs. Philippine Journal 
Sci., (2, D), 
