154 
Psyche 
[December 
frontal lobes and on the sides of the head behind the trunca- 
tion long, curved, blunt and often clavate but rarely as 
strongly clubbed as those of the clypeus. 
Thorax, petiole and gaster more finely shagreened than 
the head with the surface strongly shining. In addition to 
the shagreening there are very small scattered punctures 
present, from which arise short, delicate, fully appressed 
hairs. No erect hairs present on the thorax, those on the 
crest of the petiole very short and fine. Erect hairs rather 
sparse on the gaster, mainly confined to the row at the 
posterior edge of each segment. Legs finely shagreened 
and strongly shining with delicate, appressed hairs like 
those of the thorax. Fore femora expanded dorso-ventrally 
and strongly compressed laterally. The tarsal joints and 
the funiculi covered with abundant, short, yellowish, semi- 
erect hairs. Color deep blackish brown, the anterior third 
of the head clear yellowish brown. Tarsi, funiculi, base 
of the petiole and the sutures of the thorax light brown. 
Worker minor: head 0.9 mm., thorax and petiole 1.25 
mm., overall length 3.25 mm. (Plate 13, figure 2) 
Head, seen from the front, with the eyes notably more 
convex than those of the major, the sides in front of the 
eyes narrowing to the insertion of the mandibles. Mandi- 
bles with four well-developed teeth. Clypeus moderately 
convex from side to side, somewhat more strongly convex 
from front to rear, ecarinate or with a very blunt and in- 
distinct carina. Frontal lobes together forming a trap- 
ezoidal area which is a little wider behind than in front. 
Frontal groove absent. Occiput evenly convex, the lateral 
portions meeting the posterior border of the eyes without 
any distinct posterior angles. The antennal scape, when 
extended straight to the rear, surpasses the occipital border 
by an amount slightly less than its greatest thickness. 
Head, thorax and abdomen moderately shining with a 
rather strong, reticulate shagreening. Appressed hairs as 
in the major and female. Erect hairs long, tapered and 
with sharp tips. They are rather numerous on the man- 
Explanation of Plate 13 
Campcnotus ( Colobopsis ) papago. Fig. 1. Female. Fig. 2. Minor 
worker. Fig. 3. Major worker. (All figures drawn to same scale.) 
