IN April and May of last year, 1905, the writer made a collecting trip to the southeast part of Colorado. With the exception of a few days' stay at Lamar the entire period was spent in Baca County, which is the extreme southeastern county of the State. I arrived at Lamar at midnight of April 4, and remained there until the morning of the ioth, when I took the stage for Springfield, the county-seat of Baca County, fifty miles away, reachling there late that afternoon, and securing quarters at the hotel kept by Mrs A C. Bruner, wlo was kind enough to put up with a collector and his traps. Leaving there on the 26th, I drove east almost to the Kansas line, where I stopped at the ranch of Mr. J. M. Johnston, at whlich Monon Postoffice is located. Mr. Johnston and his family took me in, a perfect stranger, uniintroduced, gave me the best they had, in fact treated me while, and I shall always remember my stay there with pleasure. I stopped there until M1ay 9th, when I returned to Springfield and remained until the 17th. I then went nearly thirty miles ill a northwesterly direction, and located at the ranch of Mr. E. J. Gaume, in the northwest corner of the county, where I remained until the 26th, being also hospitably treated there. Then I again returned to Springfield, and left for home on June 2, but doing my last field work May 31. country about Lamnar is a prairie country, but not as level as in Baca County. Arkansas River flows by the north side of the town, and its bottom is well wooded with cottonwood trees with some underbrush. land along the river is largely taken up and cultivated. To the south the ground gradually rises until it culminates in a nearly level mesa or prairie. A ditch winds around on this rising ground and below it the land is cultivated, above not. In places tilhe soil is very sandy. road between Lamar and Springfield is over a monotonous, nearly level prairie. Two streams with a little water are crossed, Clay Creek and Two Butte Creek; also Bear Creek about two miles north of Springfield, but this has only a little water here and there in holes. Baca County is a typical prairie country, very flat and level, tiresomely so to one accustomed to the mountains. No trees except along what few water courses there are, and not always along them. These trees are mostly broad-leaved cottonwoods, with a few willow, wild plum and cherry trees. Bear Creek north of Springfield has quite a good many trees along its banks, and it is a good collecting ground. Mr. Johnston's ranch is also ot Bear Creek, but with comparatively few trees about, tho a short distance east, at about the state line, there is quite a little grove of small cotton woods which I found full of birds. And an afternoon spent on Buffalo Creek three miles northi showed many birds among the trees there. In fact wherever one could find trees along these creeks he would find birds. Bear Creek, instead of emptying into some larger stream, has an easterly course in Kansas for a little distance then disappears in the ground. Locally they say it empties into Kansas. country around Gaume's ranch is quite different as it is on the edge of what is known as The Cedars, which name covers the extreme western part of