PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 157 



placed in the top of a yucca growing in Palo Alto prairie, about seven 

 miles from the fort. The nests were not more than eight feet from 

 the ground, and were good-sized platforms of twigs, with scarcely any 

 lining. While examining these nests, the parents sailed in circles over- 

 head, constantly uttering a cry much like the bleating of a goat. Each 

 nest contained one egg. The first was quite fresh, and measures 2.35 

 by 1.91. It is of a dirty-white color, with a few reddish blotches at the 

 smaller end. The second egg was partly incubated. It resembles the 

 first one, but the reddish blotches are rather sparsely distributed over 

 the entire egg. It measures 2.35 by 1.85. 



152. Rhinogryphus aura, (Linn.) 



Very common at all seasons. Deposits its eggs on the ground, some- 

 times on the open prairie ; at others, in more or less dense chaparral.* 

 —(Cathartes a., Dresser, Ibis, 1865, 322. — Sennett, B. Eio Grande, 

 44.) 



153. Catharistes atratus, (Bart.) 



About as common as the preceding species, and, like it, breeds on the 

 ground. I have not heard of either species building in trees here, as 

 they are said to do in other parts of Texas. — (Cathartes a., Dresser, 

 Ibis, 1865, 322.— Sennett, B. Bio Grande, 45.) 



154. Columba flavirostris, Wael. 



This large and handsome Pigeon is found in abundance during the 

 summer months, arriving in flocks of fifteen or twenty about the last 

 week in February. Though not very uncommon about Fort Brown, it is 

 much more plentiful a few miles higher up the river, where the dense 

 woods offer it the shade and retirement it seeks. Three nests found in a 

 grove of ash-trees, on the bank of the Bio Grande, near camp at Hidalgo, 

 were frail platforms of twigs, such as are usually built by other Pigeons. 

 Each contained one egg. It would appear from Mr. Sennett's observa- 

 tions, which are more complete than mine, that this Pigeon rarely, if ever, 

 lays more than one egg. These are of a pearly whiteness, and average 

 1.50 by 1.08. Both sexes incubate. A perfectly fresh speeimen has the 

 soft parts as follows: — Terminal half of bill pale horn-color; basal half 

 light pink; margin of eyelids and a ring near its base deep pinkish-red; 

 iris bright orange-yellow, lighter yellow at pupillary margin; legs and 

 feet vivid purplish-red. — (Dresser, Ibis, 1866, 23.— Sennett, B. Bio 

 Grande, 45.) 



155. * Melopelia leucoptera, (Linn.) 



Very common during the summer months. The nests as a rule are 

 smaller and more frail than those of the Carolina Dove, and the eggs 

 have a decided creamy tinge, which is rarely lost after blowing, at least 



• I have looked carefully for E. burrovianus, but without success, although Mr. Dresser 

 (Ibis, 1865, p. 322) states that he has seen it on Palo Alto prairie, not more than seven 

 miles from the fort. 



