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water, was the difference in the size of the air bubbles clinging to the 

 different species. No prominent bubbles were noticed on the Grammonata, 

 while the other species entangled large bubbles in their comparatively long 

 hair which made them almost entirely helpless. Regardless of the dis- 

 parity in the size of the air bubbles, the Grammonata could withstand 

 a much longer submergence without causing death. The limit for tbe 

 hardiest of the other species was twelve hours. When placed in vials in a 

 similar manner and the air bubbles withdrawn by means of a pipette, the 

 Lycosa communis, the hardiest of all other species, did not survive 

 more than three hours submergence, while tbe Grammonata could remain 

 for twenty-four hours in the same jar with no ill effect. This would 

 seem to indicate that this species must have some special modification, as 

 perhaps greatly developed air sacs, "lungs", to enable them to resist 

 drowning so successfully. None of the other marsh spiders, with the ex- 

 ception of the crab spiders, are as free from long flimsy hair, which greatly 

 impedes an animal's movements in water, as the Grammonata. Even the 

 Lycosa Communis, whose habitat borders on the between tides zone, has 

 comparatively few long hairs, and these are comparatively stiff. 



The food of this spider, Grammonata, consists chiefly of leaf- 

 hoppers, but it also captures the small flies which frequent its habitat 

 during the low tide. It is always attached to the tip' of the grass blade 

 by a thread which enables it to run on the surface of the water after 

 food without being washed away. 



This spider, as the leaf-hopper, Megamelus marginatum, is found only 

 in the Spartina area. Its great resistance to drowning, its unique covering 

 of hair, and the instinct which causes it to seek safety by clinging to the 

 object on which it rests, instead of seeking safety in flight as other 

 species, all have determined that it could survive in the Spartina area ; 

 but as to the reason it is only found there, I cannot explain. 



Clubowia Sp. 

 This was an immature spider, light tan in color, largest specimen 7 

 mm. The first specimen was found August 1 after a period of very low 

 tides, at which time I found them in practically the entire Spartina area 

 (rare in other areas). The frequent use of a sweep net as well as search- 

 ing on the ground, failed to reveal an adult spider of this species. The 

 probable solution is that they had hatched, during the low tide period, 

 from eggs laid the previous year. I was very unfortunate in that they 



