8 
Psyche 
[February 
Leptothorax workers, and were not molested by the Harpago- 
xenus worker. They were not dealated, as is reported to occur 
for sexual forms (of both sexes) of the host species that emerge 
in nests containing H. sublcevis. However, this nest was not long 
kept under observation. 
My observations on the general behavior of the ants in the 
parasitized nests agree with those of Wheeler. The Harapa- 
goxenus workers will eat if they happen to stumble onto a drop 
of food; but they do not forage, and are fed almost entirely by 
regurgitation from the Leptothorax workers. When the nest is 
disturbed they do not move the brood, and often are themselves 
transported by the much smaller Leptothorax workers. When 
a Leptothorax from a strange colony is put into the nest it is 
usually attacked by the auxiliaries, though in one case I have seen 
a Harpagoxenus take part in resisting such an intruder. 
The male of H. americanus has not before been recorded. 
In the case of H. sublcevis Adler z did not at first distinguish the 
males from those of the host; but H. americanus males are 
strikingly different from those of L. curvispinosus in that they 
are shining black in color, and from those of L. longispinosus in 
that they have pale whitish yellow legs and antennae. The eggs, 
larvae, and newly formed worker pupae I have not yet succeeded 
in distinguishing from those of Leptothorax; but worker pupae 
nearly ready to emerge may be distinguished by their shoe r 
epinotal spines. 
Papers Cited. 
Adler z, G. 
1896. Myrmekologiska studier. III. Tomognathus sub- 
lcevis Mayr. Bihang, K. Svensk. Vet. Akad. Handl., vol. 
21, pp. 3-76. 
Emery, C. 
1895. Beitrage zur Kenntniss der nordamerikanischen 
Ameisenfauna. Zool. Jahrb., Abt. Syst., vol. 8, pp. 257-360. 
Sturtevant, A. H. 
1925. Notes on the ant fauna of oak galls in the Woods 
Hole region. Psyche, vol. 32, pp. 313-314. 
