1952] 
Creighton — Camponotus papago 
159 
in the Museum of Comparative Zoology, Cambridge, Mass. 
The type locality is Forestry Cabin (Baboquivari Canyon), 
Baboquivari Mts. (3500'), Arizona. The type nest was 
taken on July 24, 1951 in Quercus emoryi. Four other colo- 
nies were taken in this same station.! In addition four more 
colonies were secured near Perkins Ranch in Brown Canyon 
on the eastern slope of the Baboquivari Mountains. These 
last colonies were situated at elevations between 4100 and 
4600 feet. Mention has already been made of the single 
colony taken in Garden Canyon in the Huachuca Mountains. 
The elevation of the station from which this colony came 
was 5800 feet. 1 
In the following paragraphs are given the results of the 
comparison between the major workers of papago and the 
three major workers from Vera Cruz which may be cer- 
berulus : 
1. In papago the length of the head is shorter in pro- 
portion to its width and the sides of the head in front of 
the eyes are slightly convex when the head is viewed from 
above. In the Vera Cruz majors the sides of the head in 
front of the eyes are straight or nearly so when the head 
is viewed from above. 
2. In papago the scape only slightly surpasses the oc- 
cipital margin. The amount of the scape which projects 
beyond the margin is notably less than the greatest dia- 
meter of the scape. In the Vera Cruz majors the scape 
surpasses the occipital margin by an amount equal to the 
greatest diameter of the scape. 
3. In papago the triangular lateral portion of the man- 
dible is feebly and irregularly concave on its anterior face. 
In the Vera Cruz majors the triangular, lateral portion 
of the mandible is so strongly concave on its anterior face 
that the tip of the triangle appears to point forward. 
4. In papago the truncated portion of the clypeus is 
uniformly covered with coarse, reticulate ridges. In the 
Vera Cruz majors this portion of the clypeus is also reticu- 
1 Since the above was written nests of C. papago have been taken by 
the writer in Cottonwood Canyon, Peloncillo Mts. (4800'), Arizona and 
fourteen miles north of Imuris, Sonora (3200'), Mexico. In both cases 
the ants were nesting in Q. emoryi. 
