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11.It is known that no spinning of the ant cocoon can occur until s and grains , smal l pieces of wood, or o ther rubble have been placed over the la rva by the queen or workers (Wheeler, 19i0). Since sp inn ing occurs unde r this rubble pile, no observations seem to have been made in the way in which the cocoon is constructed. This paper describes the movement patterns involved in cocoon construction. Because of the difficulty of observation , the analysis of the movement patterns is based on data from relatively few larvae. Extensive data were collected from only three larvae, but short observations were made on many more which confirmed the description of the basic movement patterns . During most of the larval stage the larva shows little movement . Strong movement begins a short while before the cocoon is spun and the first action of the larva is to anchor the sand grains, rubble , etc. with silk. Within the covering of rubble thus constructed the larva spins its cocoon, so that at the end of spinning the sand grains, etc. are atta ched to the outside of the cocoon (Donisthorpe, 1927). Observations show that these early spinning movemen ts (incipient sp inn ing movements) occur some time before the larva is covered with rubble and they maybe part of the stimulus situation which elicits the cover ing responses in the workers and queen. Experiments with anaes the t i zed larvae migh t help to answer this quest ion. Worker larvae seem to have a 5-10 hour period of inc ipient spinning movements before cover ing with rubble is complete, but observation under the binocular microscope indica tes that no silk is extruded during these incipient spinning movements . The tactilest imuli from the part icles of rubble m a y elicit ext rus ion of silk in the larva . At least , it seems that the tact ilest imul i from the part icles are necessary for the continuation of the spinning movemen t s . Thus, without attention from the queen or workers a larva will soon work its way out of a pile of sand grains s imply b y per forming the spinning movements . When larvae under piles of rubble are isolated from workers, they cease their spinning movements in a short while once they have worked the i r way out of the rubble . Normally the queen or workers cover the larvae up again whenever a large portion of the larva l body becomes free of rubblepossibly chemical stimuli from the larva l cut icle elicit the cover ing responses. Larvae frequently become uncovered during these early spinning movements and are re-covered by the queen or workers.
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