4 UNITED STATES AND MEXICAN BOUNDARY. 



13. AECHIBUTEO FERRUGINEUS, Gray, (p. 34.)— Squirrel Hawk. 

 9122. Fort Davis, Texas. Dr. Kennerly, (2.) 



The only specimen procured. Observed in "a prairie dog town," of large extent, intently watching at a hole of one of 

 those animals. While in this position, was observed to strike at the prairie do^ with its claw when its head was protruded. 

 Being very intent upon \tn prey it was easily approached and shot. — (Kennerly.) 



14. ASTURINA KITIDA, Bonap. (p. 35.) 



4128. New Leon, Mexico. Lieut. Coucli. 



15. CIRCUS EUDSONIUS, Vieillot. (p. 38,)— Marsh Hawk. 



5548. San Elziario, Texas, December, 1854. Dr. Kennerly. 



Wherever we found a marsh of any extent, either east or west of the Rio Grande, there we were sure to find this oird- 

 Flying near the surface, just above the weeds and canes, it performs its endless circles hour after hour, ever and anon darting 

 after the small birds that it starts from their cover. Sometimes, when pressed by hunger, it will attack the ducks, particularly 

 the smaller ones, as teal, &c., that n>ay be feeding in the lagoons. — (Kennerly.) 



16. PANDION CAKOLINENSIS, Bon. (p. 44.)— Fish Hawk. 

 4616, Colorado river, California. A. Schott. 



17. POLYBORUS THARUS, Cass in. (p. 45.)— Caracara. 



4122. Monterey, Mexico. Lieut. Couch. — 9136. Texas. A. Schott. 



This species is exceedingly abundant from the Rio Grande to the Sierra Madre. A male was killed on the nest, which is 



r 



composed of sticks on quite low trees. 

 It destroys large numbers of the Texas field-rat {Sigmodon herlandieri ,) — (Couch.) 



18. CRAXIREX UNICINCTUS, Cass in. (p. 46.)— Harris' Buzzard. 



4123. Brownsville, Tex. Lt. Couch. — Oyster Point, Tex. ,A. Schott. 



19. STRIX PRATINCOLA, Bon. (p. 47.) -Barn Owl. 

 8701. Texas. A. Schott.— 9132. Texas. J. H. Clark. 



Found nesting in May in holes burrowed into the bluff banks of the Rio Frio. The burrows were nearly horizontal, with 

 a considerable excavation near the back end, where the eggs (three or four in number and of a dirty white) were deposited. It 

 allows the eggs to be handled without showing any concern. There was no lining whatever to the nest. — (Clark.) 



Rare at Monterey. Common on the lower Rio Grande. There it frequently lives in the sides of the large deep wells. 

 (Couch.) 



20. BUBO VIRGINIANUS, Bon. (p. 49.)— Great Horned OwL 



4613. Colorado river, Cal. A. Schott.— 9157. Devil's river, Tex. Dr. Kennerly.— 4137 

 Monterey, Mex. Lt. Couch. 



My specimen was procured in the canon of the river, where there was heavy live-oak (quercus virens) timber. It seemed, 



however, to live indifferently among the trees and the high and precipitous cliffs. This bird is found throughout Texas and New 



where 



(Kennerly.) 



McCALLI, C a 8 8 i n . (p. 52.)— Texas Screech Owl, 



Plate I. 



+ 



91tl. Texas. September 3, 1853. A. Schott. 



) 



\ 



