1907.] 
Wheeler, A Neto Guest-ant. 
79 
rado variety resembled in every way that of the Connecticut 
form, and the small nests of L. glacialis were arranged around the 
periphery under the edges of the stones in the same manner as 
those of the typical emersoni in the bogs of the Litchfield Hills. 
That the habits of the Western inquiline, however, are somewhat 
different from those of the Eastern type, is indicated by the follow- 
ing notes on the colony kept under observation in an artificial nest 
from July 17th to August 31st. 
The artificial nest was of the design which I have described 
and figured in a former paper.* and consisted of two cham- 
bers of the same size, one of which was kept dry and illum- 
inated, the other darkened and kept moist with a slice of 
sponge soaked in water. The installed colony consisted of 
the broods of both species, about a hundred Leptothorax 
workers, and a few males and females, and about seventy-five 
Myrmica workers. The queen of the latter species escaped while 
the ants were being collected. As soon as the ants and their 
broods, together with some of the earth in which they had been 
living, were placed in the lighted chamber, the Myrmicas hastened 
to transport their own larvae and pupae to the dark chamber. The 
Leptothorax, however, remained behind, and by the following day 
had hollowed out a small cavity in the earth and had brought into 
it all their young. This cavity was immediately beneath the glass 
roof-pane and fully exposed to the light. The Myrmicas kept 
visiting the Leptothorax continually, but the latter pulled the 
intruders by the forelegs or antennae, and in every way showed 
the same desire to be left alone in their own habitaculum, as I have 
observed, under similar circumstances, in the Eastern emersoni. 
The Myrmicas endured no end of tweaking and pulling, but 
nevertheless kept pushing their way into the Leptothorax cavity 
as if unable to forego the society of their little inquilines. 
Although so jealously guarding their own habitaculum against 
*0n the Founding of Colonies by Queen Ants, with Special Refer- 
ence to the Parasitic and Slave-Making- Species. Bull. Am. Mns. Nat. 
Hist. XXII, 1906, p. 48, %. 1. 
