TWENTY-SECOND ANNUAL REPORT 101 
esting models and mimics among insects were taken, with full 
notes, and an interesting series of paintings begun, depicting 
the extremes of color change in lizards. Remarkable success was 
attained in this work by the use of chloroform, the reptiles ex- 
hibiting radical changes of color and pattern at a certain stage 
of anaesthetic relaxation. One of the most valuable acquisitions 
was a set of ninety paintings and sketches of living zoological 
subjects, made by Miss Cooper and Mr. Tee Van, both of whom 
volunteered their services for this purpose. 
Several thousand specimens, ranging from mammals to in- 
sects, were collected and brought back, eighty-five of them being 
alive. These specimens were as follows: 
800 Arachnida 20 Amphibians 
3,880 Insects 51 Reptiles (6 alive) 
30 Fish (all alive) 98 Birds (42 alive) 
7 Mammals (3 alive) 
Among the most important and interesting additions to the 
collection of the Zoological Park were a young tapir in the striped 
pelage, an Imperial Amazon parrot, (Amazona imperialis), and 
a silky ant-eater, (Cyclotes didactylus), the latter brought north 
for the first time to any American collection of living animals. 
A black-throated cardinal, (Paroaria jugularis), was new to our 
series of these handsome birds. Four toucans, a hawk-headed 
parrot, (Deroptyus accipitrinus accipitrinus), a spotted cavy and 
numerous small birds completed the shipment. 
In addition to the work at the Guiana Station, collections 
were made on nine West India Islands, during stops of the 
steamer. 
During the year 1917 the following articles appeared in con- 
nection with the Tropical Research Station: 
A Naturalists’ Tropical Laboratory, by Theodore Roosevelt, 
Secribners, January. 
The Pomeroon Trail, by William Beebe, Atlantic Monthly, 
January. 
A Hunt for Hoatzins, by William Beebe, Atlantic Monthly, 
February. 
With Army Ants “Somewhere” in the Jungle, by William 
Beebe, Atlantic Monthly, April. 
