? J 



5> 



INTELLIGEXCE OF ANTS. 177 



EXPLANATION OF PLATES XIL, XIII. 



Hydra, with Tnchoclina pediculus. 



T. pediculus ; side view, showing upper and under cilia. 



Ditto, under side, showing the adherent apparatus, ciliary 



crown, uncini, etc. 

 4. — Keroua iJolyporum. Ventral view. 

 6. — Baphda pnlex ; front view of head, seen from underneath, 



showing the double basal joints of superior and inferior 



antennae, a. ,6. — Superior antenna, c. — Inferior antenna. 



Ditto, side view of head and back 



Ditto ; detailed view of extremity of a superior antenna, 



showing the short strong exterior seti^, and the long fine 



interior setse. 



Piumatella repeus, with ova. General view. 



Ditto ; enlarged view of a polypide, shewing cilia circling 



round each tentacle. 



Vorticella. General view. 



Ditto ? a zooid, greatly magnified to shew the transversely 



striated muscle of the pedicle. 

 13. — Stephanoceros Eichornii; sketch of the crown in a favourable 



position and good light, shewing the inward curve of the cilia. 



Intelligence of Ants.* — 1 send you the following regarding 

 ants, by Mr. W. E. Bosworth, of this city, written out at my request, which 

 seems to me an mteiesting and at the same time a somewhat rare observation. 

 It is almost exactly similar to the account by ^^IcCook of the sleeping of 

 harvesting ants of Texas, as quoted in G. J. Romanes' " Animal Intelligence," 

 p. 84. I do not recall any other instance given of the sleeping of ants : — 



•' At different times, and for more than one season, I was favourably situa- 

 ted to see the movements of quite a large colony of small black ants, as they 

 passed to and fro in their busy haste over a board floor, going, as I supposed, 

 for their supply of water, which was in the direction of a small stream close by. 

 While watching their quick, eager movements, there were several along the 

 line that attracted my attention, as they remained in one place so long that I 

 concluded they must be dead ; and although they were directly on the Hne of 

 march, and n the way of the others, these passed on, paying no attention to 

 them whatever. At another time I noticed that one of the ants, supposed _ to 

 be dead, got up, and walked off as lively as the rest ; and, while watching 

 this one, another close by began to slow up, and seemed to totter in his 

 gait, and finally came to a dead halt. After seeing this, it occurred to me that 

 the one had just waked up, and the other had just gone to sleep. In order to 

 test the matter, and gratify my curiosity, I concluded to experiment on some 

 of them. With a fine straw they were gently rubbed on the back. This mild 

 treatment did not make the slightest impression on them, but a sharp push 

 seemed to take them completely by surprise, and to fully arouse them. For an 

 instant they seemed lost, circulating around, running up and down, and finally 

 starting off with the rest. This was repeatedly tried with the same result. 

 Their movements on being disturbed very forcibly reminded me of a child when 

 suddenly waked out of sound sleep." — J. H. Ilowe, Louisville, Ky., Nov., 1889. 



* From Science. 



