TWENTY-FIFTH ANNUAL REPORT 113 
Miss Isabel Cooper, Bryn Mawr College—Artist. 
Alfred Emerson, Cornell University—Life History of Kar- 
tabo Termites. 
J. F. M. Floyd, University of Glasgow 
brata. 
Forbes, Cornell University—Organs of Hearing in Lepi- 
doptera. 
H. Gifford, University of Nebraska—Comparative Ophthal- 
mology. 
G. I. Hartley, Cornell University—Relationships of Certain 
Non-oscine Birds. 
Clifford Pope, University of Virginia—Life Histories of 
Kartabo Fish. 
Miss Mabel Satterlee, Columbia University—Coloration of 
Ameiva and the Painting of Optical Fundi. 
T. V. Smolucha, New Jersey—Photography and Pen-and- 
Ink Drawing. 
Miss Anna Taylor, South Carolina—Botanical Painting. 
John Tee-Van, Zoological Society—Ecology of Certain Lepi- 
doptera. 
Wm. M. Wheeler, Harvard University—Ants of Kartabo. 
C. A. Wood, Stanford University—Optical Fundi of Birds 
and Other Vertebrates. 
Twenty or thirty papers are in course of preparation and 
will be published, beginning with the autumn of 1921. Only 
the barest outlines can be given of some of the researches at 
present being carried on. 
In the field of biology, the three aspects to which most atten- 
tion has been paid have been color, its occurrence, development 
and use; breeding, with especial attention to season, courtships 
and nests; and food, with detailed examinations of stomachs of 
all classes of vertebrates. 
Parasites of Verte- 
About sixty species of mammals have been recorded from 
the district, ranging from mouse opossums to dolphins. One of 
the rarest is the two-toed or silky anteater, of which three have 
been seen, the last individual in the Colony House at the Penal 
Settlement. The mammals of British Guiana possess a unique 
historical interest, from a taxonomic point of view, for most of 
