STUDIES ON ARIZONA ANTS (4) 
CAMPONOTUS ( COLOBOPSIS ) PAPAGO, A NEW 
SPECIES PROM SOUTHERN ARIZONA 1 
By Wm. S. Creighton 
Department of Biology, College of the City of New York 
This paper deals with ten colonies of Colobopsis taken 
by the writer in southern Arizona during the summers 
of 1950 and 1951. The work done during the second sum- 
mer was made possible by a fellowship from the John Simon 
Guggenheim Memorial Foundation. Most of the observa- 
tions on habits carried in this paper were made during 
the first months of a fifteen month survey of the ants of 
the southwestern United States and northern Mexico. I 
am happy to take this opportunity to express my sincere 
appreciation for this fellowship. I wish to thank Mr. Harry 
Stevens, the United States Agent in charge of the Papago 
Indian Reservation at Sells, Arizona, for his kindness in 
permitting us to use the Forestry Cabin on the western 
slope of the Baboquivari Mountains. We are also grateful 
to Mr. and Mrs. Forrest Perkins, who generously turned 
over their ranch house to us during our stay on the eastern 
slope of the Baboquivaris. The comfortable surroundings 
provided in each case greatly facilitated the work with the 
ants. 
The older records for the species described in this paper 
were regarded by W. M. Wheeler as representatives of 
C. (Colobopsis) cerberulus Emery. For reasons which will 
be given later, I feel that it is a much sounder procedure 
to treat this ant as a new species. To do so involves the risk 
that it may subsequently prove to be cerberulus , as Wheeler 
supposed. But this risk must be taken if we are ever to 
get out of the fog which has obscured cerberulus from the 
time of its original recognition. In 1920 Emery described 
cerberulus from a single, winged female taken in the state 
1 Published with a grant from the Museum of Comparative Zoology 
at Harvard College. 
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