1907.] 
Wheeler, A Netc Guest-ant. 
83 
learned to eat from the manger and lived several months ' as a 
pure colony. 
During August the gaster of one of the larger Myrmica 
wortsers in the original nest became unusually distended, and as 
small packets of eggs were continually appearing and being as 
rapidly devoured by the workers, I concluded that this unusual 
individual had become gynaecoid and was trying to function as 
the queen of the colony. At the end of the month, after all the 
brood of both species had hatched and the ants had become demor- 
alized, as usually happens when there are no young on which to 
concentrate their attention, I discontinued my observations. The 
gynsecoid worker was dissected and found to contain a number 
of mature eggs. 
The above observations indicate that the habits of L. glacialis 
are similar to those of the typical emersoni, although differing in 
two important respects : first, the Colorado form feeds less on 
the surface secretions of its host and more on regurgitated food ; 
and, second, this ant seems to have lost the instinct to secure its 
food in any other way. If further observations should prove that 
these differences are common to all colonies of L. glacialis, and 
not an idiosyncracy of the colony which I happened to have under 
observation, or due to the depressing and demoralizing effects of 
confinement in an artificial nest, we should be justified in con- 
cluding that this subspecies has reached a more advanced stage 
of inquilinism or parasitism than the typical form of the Eastern 
States. 
American ^Museum of Natural History, 
New York C'ltj, AEarch 9th, 1907. 
