Bendire.] 134 [March 21, 



will make repeated attempts to capture full-grown cLickens in the 

 post, paying no attention to the close proximity of several men, but 

 returning again after a few minutes to make another attempt. In the 

 fall they become excessively fat. A very old female shot by Lt. G. 

 A. Bacon, U. S. A., Nov. 23, 1875, and now in the collection of the 

 Smithsonian Institution, Washington, weighed four pounds twelve 

 ounces. Length 18.50, wing 13.25, tail 8 inches. Iris blue, base of 

 bill and cerci light blue, the tip darker ; tarsi and toes pale greenish 

 blue. 



108. Falco communis var. anatum (Bonap.). Duck Hawk. 

 Rarer than the preceding species, and only seen near Malheur 



Lake, attracted by the great numbers of water fowls of all kinds. 



109. Falco columbarius (Linn.) var. richardsoni. Pig- 

 eon Hawk. 



Rather rare. A nest of this species in a large pine tree May, 1876, 

 contained young. The old birds were carrying them food. This is 

 the only nest I have seen. 



110. Falco sparverius (Linn.). Sparrow Hawk. 



A very common summer resident, breeding abundantly about Camp 

 Harney, usually occupying old woodpeckers' nests in juniper trees. 

 In about twenty-five nests of this species the largest and usual num- 

 ber of eggs has been five. These vary in color, size and shape. In 

 some the ground color is a pure white, in others cream color, and 

 again a very dark buff. One egg is almost pure white, with scarcely 

 perceptible spots, others are spotted and blotched with a reddish 

 brown over the entire egg. A very handsome specimen has the 

 ground color pure white with large blotches and spots of brownish 

 red and lavender, aggregated principally about the smaller end. The 

 largest egg in sixty is 1.45 X 1-17, the smallest 1.20 X 1-10 of an 

 inch. It is one of the latest to breed, commencing to lay about May 

 20. It rears but a single brood a season. 



111. Pandion carolinensis (Gmel.). Fish Hawk. 



A rare summer visitor; a pair breeds yearly on the lower Sy Ivies 

 River. I also took a nest near Fort Lapwai, Idaho, in 1876. 



112. Circus eyaneus var. hudsonius (Linn.). Marsh Hawk. 

 Moderately abundant and a few resident. A set of eggs taken near 



Fort Lapwai, Idaho, June 15, 1871, is very distinctly spotted with 

 dirty brown. In two specimens the spots are few but very large, and 

 in all they are plainly visible. Several other sets show no indications 

 of spots. The usual number of eggs seems to be five, but I have 



