64 
Psyche 
[June 
dred and sixty-five minors and medias, six majors and one 
female. In the second colony there were sixty-four minors 
and medias, seven majors and two females. In the third 
colony there were one hundred and thirty-four minors and 
medias and ten majors. Unfortunately the female of this 
nest escaped capture. From the above it would appear that 
the colonies of ulcerosus are small, even when more than one 
female is present. It is also worth noting- that all the brood 
taken in the three nests was in a fairly young condition. 
No pupae were found and, since the last nest was taken on 
July 27th, it seems safe to conclude that the marriage flight 
of ulcerosus must occur at the end of the summer or in 
the early fall. 
Literature Cited 
1. Wheeler, W. M. 
Ann. N. Y. Acad. Sci. Vol. 20, pp. 349-351, 1910. 
2. Wheeler, W. M. 
Psyche, Vol. 28, No. 1, 1921. 
3. Emery, Carlo 
Genera Insectorum, Fasc. 183. 1925. 
4. Creighton, W. S. 
Bull. Mus. Comp. Zool. Vol. 104, 1950. 
5. Wheeler, W. M. 
Bull. Mus. Comp. Zool. Vol. 77, No. 5, 1934. 
6. Barnes, W. C. 
Univ. Ariz. Bull. Vol. 6, No. 1 (Gen. Bull. No. 2) 1935. 
7. Shreve, F. 
in Kearney & Peebles, U.S.D.A. Misc. Pub. No. 423, 1942. 
