1930 ] 
Ant-tree Notes 
115 
gaster, antennae and legs deep castaneous brown, the head 
black, the mandibles and corners of the clypeus red. Pi- 
losity shorter and less abundant, especially on the head. 
Antennal scapes extending a distance greater than their 
apical diameter beyond the posterior corners of the head. 
The female (dealated) measures 10-12 mm. and has a 
longer and posteriorly narrower head than any of the 
more shining than the typical form of the species. Thorax, 
other forms of xanthochroa, with nearly straight sides, 
deeper excision of the posterior border and less convex 
eyes. Thorax and gaster somewhat darker, more reddish 
yellow; head, antennae and femora red, clypeus and mandi- 
bles deep red. Hairs on the body and tibiae blackish, long 
and abundant ; appressed pubescence also long but 
yellowish. 
Described from numerous workers and fifteen females, 
constituting small incipient colonies, taken by Dr. George 
Salt from the internodes of young Cecropias at Vista Nieve, 
Sierra Madre de Santa Marta, Colombia, at an altitude of 
5000 feet. 
21. Coelomera cayennensis Fabr. In life this Chryso- 
melid beetle has bluish-black elytra and a reddish pro- 
thorax. It is very common on young plants, but never , in 
the experience of the junior author, on the older ones. The 
old plants often have the leaves stippled with minute holes, 
the origin of which was not discovered, but never have the 
marks of beetle feeding. Nor were any of the chrysomelids 
seen on Cecropias containing developed colonies of Azteca, 
but this may, of course, have been because the beetles pre- 
ferred the young plants as food and not because they had 
been driven away from the older ones by the ants. Beetles 
were taken in January, February, May, June, July, Novem- 
ber and December. They are, therefore, probably either 
multiple-brooded or always present. 
During the rains, probably in May, the junior author 
feels reasonably certain that he saw large Scarabseids ( ap- 
parently Pelidnota sp.) feeding on young Cecropias, but 
he did not know at the time that the plants were worth 
study. 
