of some Guatemalan Birds . 61 
4. Polioptila albiloris. Ghoacus, May 15,1860. Female 
bird, nest, and four eggs. 
The nest is composed outwardly of dried stalks of grass and 
roots, with a coating of cobweb and other adhesive materials. 
The interior lining consists of the feathery parts of seeds, horse¬ 
hair, and fine grass, the whole forming a very neat, compact 
structure, measuring If inch across the inside, and 1J inch in 
depth. 
The eggs (Plate II. fig. 3) are white, spotted with red, prin¬ 
cipally of two shades, the spots increasing in number towards the 
obtuse end. They measure, axis *6, diam. *45 in. 
The nest was procured from Choacus, near the Rio Montagua, 
the same locality whence the male specimen was obtained from 
which the description in P.Z.S. 1860, p. 298, was taken. 
Pemale bird, nest, and four eggs advanced in incubation. 
The nest was taken in the cc monte bajo ” (low brushwood) grow¬ 
ing almost under the eaves of one of the ranchos. 
5. Cotyle serripennis. “ Golondrina San Geronimo, May 
20, 1860. Bird, nest, and five eggs. 
The nest is composed of grass and fine roots, the inside being- 
strewn with pieces of dead flag. 
The eggs are white, and measure, axis *7, diam. *5 in. 
The nest was dug out of the white sandy soil of a barranco in 
the Convent garden. The cave ran horizontally, and was about 
2 feet in length, terminating in a chamber of just sufficient di¬ 
mensions to allow the bird to turn round. 
'J- 6. Progne dominicensis . Female bird and four eggs. 
The eggs are white, and measure, axis, *85, diam. *63 in. 
Mr. Owen has sent no note with these eggs. 
7. Molothrus jeneus. cc Tordito ” San Geronimo, June 2, 
1860. Several eggs. 
The eggs are pale greenish white, and measure, axis 1 inch, 
diam. *75. 
A few eggs of the “ Tordito," taken from the nests of the 
“ Chorcha ” [Icterus) and the “ Cien-sonte mejicano” (Mimusgra¬ 
cilis). The Indians here all identify these eggs as those of the 
“ Tordito." However, personally, I have never surprised the bird 
