444 Mound-Making Ants of the Alleghenies. [July, 
by M. Guenée, in the “ Annales de la Société Entomologique de 
France,” Ser. iv, tome 7, 1867, pp. 665—668, which I have con- 
sulted. The paper is brief but exceedingly interesting, and gives 
a full description, illustrated by figures, of organs found upon 
the eleventh segment of the larva of the butterfly (Lycena 
betica), whose protrusion from two openings near the ninth 
and last pair of stigmata, was observed, and the action’ 
_ and organ figured and described. At the summit of the tenth 
segment the author found another single opening, placed trans- 
versely, and surrounded by a projecting border around which the 
granulations which cover the whole body of the larva are especi- 
ally massed. Out of this sort of button-hole, and at the middle, 
rises, at the will of the grub, a species of hemispherical, transpar- 
ent vesicle, which gives passage to a serous liquid sufficiently 
abundant to form a large drop, which is reproduced whenever it 
is removed. The larva does not secrete this liquid except when dis- 
turbed, imitating in this respect the Cucullia and many other larve 
which disgorge at the mouth a colored liquid, with the intention, 
doubtless, of repelling those who molest them. M. Guenèe ven- 
tures no opinion as to the economy of this exceptional structure. 
_ But, his description throws great light upon the behavior of the 
_ants as recorded above There can be little doubt that the gath- 
ering of a serous liquid, like that observed by M. Guenée, upon 
Lycena’ betica, was the object of the attendance of the ants of 
Formica fusca upon the Lycænid larva as observed by myself. 
This larva (in alcohol) was placed in Dr. Leidy’s hands for ex- 
amination, under the microscope. He found on 
each side of the two (or three) last segments, on the 
dorsal surface, a prominent, circular, brown- colored 
glandular looking body, with a central depression. 
These glands were quite distinct from the spiracles, 
which are not represented in. the accompanying 
situated upon one side of the terminal segments. 
Pic.8. Gl a h ts are here 
ison Cévminal ee is possible that the last three segments a s 
segments of Ly- represented, the last (twelfth) being contracte 
cenid larva, at- Dr, Leidy found no opening at the summit of the 
tended by Formica tenth or other segment, corresponding with the: 
fusca. 
button-hole-like secretory gland described by 
cut. Fig. 8 shows the appearance of these glands ° 
S 4 — ee above facts are = of very great interest, and sai < : 
