1930 ] 
A Second Note on Gesomyrmex 
39 
from its much greater size and its smaller mandibles, 
petiole and genital appendages, his specimen would, after 
all, seem to be a true male Gesomyrmex. The head, an- 
tennae, thorax and wings are very much like the corre- 
sponding parts of the above-described male of chapmani, 
and the discrepancies in the other parts are perhaps attrib- 
utable to defects in Mayr’s figure. It is not so easy to make 
an accurate drawing of an insect embedded in a block of 
fossil resin as it is of one carded or pinned. 
The specimens of the new variety were accompanied by 
Dr. Chapman’s notes which are worth quoting, because they 
contain the first observations on the habits of Gesomyrmex. 1 
“May 11, 1924, at 8 A. M., while sitting on our azoteo, 
I noticed on the balustrade a honey-colored ant which 
arrested my attention by its peculiar jerky, zigzag gait 
and unusually large dark eyes. On capturing it I found it to 
be a small worker of Gesomyrmex ! Then a few others were 
seen running about in the same place. I smeared some 
ripe banana in their path on the railing and found that 
they at once proceeded to gorge themselves with the juices. 
They eventually moved away and I followed them down 
a banister and along the sill to one of the large posts which 
serve as supports of the house. From this post they passed 
to a pole, which I had placed diagonally between two of 
the posts, to serve as a brace. They descended this for a 
foot or more and together entered a hole in its surface. 
There were other workers within the entrance but they 
could not be induced to come out. During the day several 
workers were seen to visit and feed on the banana. The 
last one retired to the nest at 5 P. M., apparently for the 
night. 
“The pole containing the nest was about eight feet long 
and was two and one-half inches in diameter where the nest 
was situated. The entrance consisted of four small, slit-like 
holes, close together and resembling the orifices of beetle 
burrows. The pole had been cut about two weeks previously 
on the mountain side behind the house from a particular 
J Dr. Chapman also sent me a series of drawings of the various 
worker castes of G. chapmani to illustrate the identity of Gesomyrmex 
and Dimorphomyrmex. I have not reproduced these drawings because 
they are so much like those in my paper on G. kalshoveni. 
