1928] 
Some Cordia and Triplaris Insects 
167 
SOME CORDIA AND TRIPLARIS INSECTS. 
Owing to unavoidable delay in the preparation of a com- 
prehensive paper on the myrmecophytes of the Neotropical 
Region and their insect tenants, it has seemed advisable to 
publish at this time three short papers kindly contributed by 
Mr. H. S. Barber, Dr. W. M. Mann and Prof. T. D. A. Cockerell 
on some of the undescribed forms belonging to the complicated 
biocoenoses which center about the peculiar ant-trees, Cordia 
alliodora Ruiz and Pavon and Triplaris americana L. 
W. M. Wheeler. 
I. A NEW BOLIVIAN SILVANID BEETLE FROM THE 
MYRMECODOMATIA OF CORDIA. 
By H. S. Barber, 
Bureau of Entomology, Washington, D. C. 
Since Dr. Wheeler (Zoologica Vol. 3 pp. 35-134) described 
the remarkable biological relationships between Coccidotrophus 
socialis Schwarz and Barber and mealy-bugs of the genus Pseu- 
dococcus in the myrmecodomatia of Tachigalia paniculata Aubl., 
Dr. W. M. Mann has discovered a second species of Coccidotro- 
phus in Bolivia, in the hollow swellings at the forking of the 
twigs of a different ant-sheltering tree, Cordia alliodora Ruiz and 
Pavon. The beetle must have been living under adverse con- 
ditions, since it was encountered only once among a great many 
of the hollow swellings which were opened, but according to Dr. 
Mann, it was attending Coccids as described by Wheeler for the 
species from British Guiana. 
Coccidotrophus cordiae sp. nov. 
Similar to C. socialis but larger and more robust: head, 
pronotum and elytra relatively much broader; antennal club 
broader. 
