136 



THE CANADIAN ENTOMOLOGIST. 



There is no compelling by rough means on the one part and no reluctant 

 yielding on the other. The demonstrations made by the ants are of the 

 most gentle nature, caressing, entreating, and as the little creatures drink 

 in the sweet fluid, lifting their heads to prolong the swallowing with mani- 

 fest satisfaction and delectation, then lick away the last trace, caressing 

 the back of the segment with their antennae as they do so, as if to coax 

 for a little more, it is amusing to see. 



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

 rounded at the top, and studded there with little tuberculations from which 

 rise the tentacles. '1 hese last arc tapering, armed with little spurs dis- 

 posed in whorls, and stand out straight, making a white hemispherical 

 dome over the cylinder, and none of them fall below the plane of the 



base of the dome. Nor do they ever hang limp or 

 lie across the dome, as described by (iuenee in L. 

 bcetica. When the tube comes up, the rays are 

 seen rising 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 the tube is withdrawn, the top of the dome sinks first 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 in pencil again. The 

 expanded tube and its dome are beautiful objects to 

 look upon. 



I desire to express my obligation to Dr. J. (libbons 

 Hunt, of Philadelphia, for microscopical observa- 

 tions made on these larvae. Aided by him, Miss 

 Peart has been able to make several drawings, some 

 of which I give herewith, showing the expanded tube and one of the 

 rays, and the pencil of rays described. 



The same organs are found in larvae of L. corny nt as, and their shape 

 is precisely as in pseudargiolus* 



I stated on page 80 that all the black individuals of violacea taken 

 proved to be males. I find no black female of this species, and presume 

 there is none. 



Coalburgh, 15th July, 1878. 



Fig. 8. 



* In Newman's British Butterflies, London, 1871, p. 125, I find this sentence 

 quoted from Prof. Zeller : " I could not perceive that these caterpillars ( L. medon) had 

 a cone capable of being protruded, like that which we find in /,. corydon, and which the 

 ants are so fond of licking." 



