90 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



son's Snipe, Band-tailed Pigeon, Turkey Vulture, Marsh 

 Hawk, Western Red-tailed Hawk, American Osprey, Northern 

 Spotted Owl, California Pygmy Owl, California Cuckoo, Nut- 

 tail's Woodpecker, Poor-will, Pacific Nighthawk, Anna's Hum- 

 mingbird, Arkansas Kingbird, Ash-throated Flycatcher, Gray 

 Flycatcher, Dusky Horned Lark, Western Crow, Western Ves- 

 per Sparrow, Brewer's Sparrow, Sooty Fox Sparrow, Western 

 Martin, Cliff Swallow, Barn Swallow, Tree Swallow, Macgil- 

 livray's Warbler, Pygmy Nuthatch, and Sierra Hermit Thrush. 



A notable fact in this is that no species of swallow is in- 

 cluded in the Alexander expedition, whereas we found at least 

 three. Nor did the Sierra Hermit Thrush appear to be breed- 

 ing in the territory covered by that party, although one would 

 suppose it to be rather widespread in this region, especially so, 

 as in all probability some of the records of the "Dwarf Hermit 

 Thrush" mentioned as noted in several localities by the Mer- 

 riam parties were of this form. 



While the Academy's expedition was principally interested 

 in the bird life of the region visited, and succeeded in adding a 

 number of species to the recorded list of Siskiyou County birds, 

 and in adding in other ways to the comparatively meager 

 knowledge of its avifauna, at the same time special efforts were 

 made to obtain specimens of the rodents at each station. In 

 this the results were disappointing, and, while part of our lack 

 of success may have been due to want of experience on the part 

 of the assistant members, there appeared to be a great thinning 

 out, by some agency, of these small mammals. Probably the 

 three successive dry seasons, with attendant scarcity of accus- 

 tomed food supply, had something to do with this diminution 

 in numbers. 



The expedition was brought to a close June 16. 



