SYLVICOLIDA. 163 
teristics as they appeared to him from a purely microscopical voint 
of view. 
y 
| | 
Vy 
1 6 8 9 
1. Glossiptila ruficollis. Jamaica. 6. Dendroica striata. Nassau. 
2. Certhiola bahamensis. Nassau. 7. Helminthophaga celata. Arctic America, 
3. Mlorophanes atricapiilla. Trinidad. 8. Teretristis fornsti. Cuba. 
4. Dacnis cayana. 9. Vireo barbatula. Nassau. 
5. Perissoglossa tigrina. Nassau. 
The following figures represent one branch of the bifurcated tip 
of each tongue more highly magnified. The references are the same 
as in the preceding figures. 
5a 6a 7a 8a 
Nos. 2, 3, 4, and 6 were drawn from alccholic specimens; 1, 5, 7, 8, and 9 from tongues 
removed from the dried skin, and therefore perhaps not perfectly accurate. 
“The base of the tongue is bifid and armed with teeth pointing backward 
to prevent the escape of food. The largest teeth are at the extremities of the 
two points. In Certhiola, Perissoglossa, Dendroica, and Teretristis the teeth 
are all sharp, with the intermediate teeth nearly as large as the terminal 
ones, and there are two or three teeth on the outer sides of the points. In 
Glossiptila there is only one tooth on these outer edges. Vireo differs from 
all the rest in having a broad and shallow excavation between the two points, 
which are short, stout, and blunt; and the edge of this excavation is armed 
with very minute, equal teeth, while there are no true teeth on the outer 
edges of the points.”—Stimpson. | 
