58 
Psyche 
[June 
petiole. Mandibles with elongate, oval punctures. A few 
feeble, coarse punctures are present on the clypeus and the 
cheeks. In some specimens these are so shallow that they 
can only be seen in oblique lights. Color black, the mandi- 
bles, antennae and tarsal joints light brown. The anterior 
edge of the clypeus and the area immediately behind the 
insertion of the mandibles often marked with brown. In 
many specimens the abdomen, and to a lesser extent the 
thorax, will show bluish reflections. 
Worker media : head (mandibles excluded) 1.75 mm. long; 
thorax and petiole 2.5 mm. long; total length 6-7 mm. Pi- 
losity as in the minor worker. Sculpture of the thorax and 
abdomen as in the minor worker. The head is a little more 
strongly granulose and less shining with numerous, con- 
spicuous, oval punctures on the clypeus and cheeks and a 
few feebler punctures on the frontal lobes. Most of the 
clypeus, the anterior portion of the cheeks and the anterior 
half of the frontal lobes light brown. The color otherwise 
as in the minor worker. 
Female: head (mandible excluded) 2 mm. long; thorax 
and petiole 4 mm. long; total length 9-10 mm. Erect hairs 
on the thorax sparser and a little shorter than those of the 
worker castes. Erect hairs elsewhere very similar to those 
of the worker. Sculpture of the head similar to that of the 
media worker but with the punctures more pronounced, par- 
ticularly on the frontal lobes where they extend rearward 
to the level of the median ocellus. Scutum densely and 
evenly granulose, feebly shining with scattered, irregular 
punctures from which the erect hairs arise. The remainder 
of the thorax more strongly shining, particularly the lateral 
portions of the pronotum, the metanotum, the basal face of 
the epinotum and the mesothoracic sternite and episternite. 
On the above areas the granulation is reduced to a delicate 
and minute reticulate sculpture. Gastric sculpture heavier 
than in the media, particularly on the dorsum of the first 
gastric segment where the sculpture consists of a minute 
pattern of reticulations. Front of the head usually marked 
with brown as in the media but sometimes the entire head, 
except the mandibles and antennae, is black. The four fe- 
