12 LYC^NA IL, TIT. 



of which exudes a tiny drop of clear green fluid. This the ants drink greedily, 

 two or three of them perhaps standing over it. The demonstrations of the ants 

 are of the most gentle nature, caressing, entreating, and as the little creatures 

 drink in the fluid, lifting their heads as if to prolong the swallowing, there is a 

 manifest satisfaction and delectation that is amusing to see. They lick away the 

 last trace, and stroke the back of the segment, and wait to see if their coaxing 

 avails anything. If not, they run about, some seeking other larva3 on same 

 stem, some with no apparent object, but presently ail return, and the caressings 

 go on as before. The intervals between the appearance of the globule vary 

 with the condition of the larva. If exhausted by yielding to the frequent solici- 

 tations, some minutes may elapse, and the tubes meanwhile will remaiil con- 

 cealed ; but a fresh larva requires little urging, and the mere intimation of the 

 presence of an ant in the vicinity is enough to cause the tubes to play rapidly, 

 and one globule to follow another, sometimes without a retracting of the mem- 

 brane and before the near approach of the ants. I have counted six emissions in 

 seventy-five seconds. The tubes are usually expanded wdien the ants are away 

 from the last segments, and are retracted when the}^ come near. I counted the 

 leno'th of these periods of complete and quiet expansion, ten, twenty, fiftj^, and 

 to eightj'-two seconds, the period always ending with the approach of the ants. 

 I experimented largely, introducing ants to larvte in glass tubes, and placing 

 larvoe from my tubes upon stems of the growing plant where the ants had 

 access to them. When a fresh larva was brought to the stem, as soon as the ants 

 discovered it, there was an immense excitement and a rush for the last larval 

 segments. The larva forthwith relieved itself by the excretion of the fluid, and 

 the tubes stood out with tops expanded between the periods. If I placed a fresh 

 larva on a stem on which were no ants, there was no excitement hi the larva, no 

 appearance of the tubes, and no movement on 11. If ants were now transferred 

 to this stem at once the larva changed its behavior. 



The tubes in the present species are white, cylindrical, of nearly even size, 

 rounded at the top, and studded there with minute processes from which come 

 the tentacles. (Fig. m'.) These are long, slender, tapering, armed with fine fila- 

 mentous spurs disposed in whorls, and they stand out straight, making a white 

 hemispherical dome over the cylinder, and none of them dip below the plane of 

 the base of the dome. When the tube comes up, the vays are seen to rise in a 

 close pencil, and as the dome expands they take position. On the contrary, 

 when the tube is withdrawn, the top of the dome sinks first, and the rays come 

 together. (Fig. m^) 



The position of these organs is apparent in the younger larval stages, but till 

 after the second moult I believe the larva has no power to project the tubes, and 



