Sniiur du IS Mars lu lì 



(il 



upper shil) wIumicc il rcluiiicd ra[)i(lly lo llic iicsl. 



Al ll.;i") a i^roup of hall' a dozen anls cainc IVoiu 

 Ihc iicsl willi a imic'.- lari^tT ani al their head and eliin- 

 hed on lo Ihe h)\ver shih. Here Ihe l)ii; one lei'l Iheni and 

 al 11.42 was hack in the nest. Tlie smaller ants wand- 

 ered ahoul li'vini; dilT- rent pins. 



Al II.4N e.ni. liie hii^ ant rt'turned with about 10 

 other ordinary anls, led them ii|) llie central j)in and 

 round lo the ui)per surface of the middie slab, went 

 hack alone to tiie table, carefully went over the path 

 alon.L; Ihe table, feelini^ with its antennae and workinif 

 its ja\\s about, it then returned to the cork, up the 

 central pin, round the e(lii;e and up the card to the Tryx- 

 alis with t'(iual care. .\l ll.."iSlhere was a double stream 

 of anls at woik as busily as before llie interi-u|)tiün ; 

 the big ani had disap|)eared and the stragglers had re- 

 joined the main column. 



At noon 1 took out the central |)in and re|)laced 

 it by a short one which did not leach the cork. 



The ants from above swarmed lound the spot where 

 the pins head had reached Ihe cork. Those from the 

 nest came to the |)in, some went up at once, others 

 hesitaled and then went u|), others again did not go up 

 at all ; all very soon returned to the nest. The big ant 

 or anothi-r like il now came out again and examined 

 the s|)ot where the |)in had been ; gave it up and after 

 wandering about went up another pin on to Ih.e middle 

 slab found the old track, returned lo the nest and by 

 12. 10 the new road was completely established. 



We may infer from these obsi'r\alions that : — 



(1) thesi' small ants ha\t' no sense ol' direction. 



(2) the\' cannot lind their wav bai-k to the ni'st. 



