160 



THE AMERICAN NATURALIST [Vol. XLVIII 



Stejneger, L. 



1885. Eesults of Ornithological Explorations in the Commander Islands 

 and in Kamtschatka. Smithsonian Inst. Nation. Mus. Bull., 29, 

 382, 8 pis. 

 Tower, W. L. 



1906. An Investigation of Evolution in Chrysomelid Beetles of the Genus 



Leptinotarsa, Washington, Cam. Inst. Publ., 48, x, 321, 30 pis., 

 31 figs, in text. 



TJImer, G. 



1907. Trichoptera. Genera Insectorum (ed. by Wytsman, P.), 60, 259, 



13 col. pis., 28 black pis. 

 Wallace. A. B. 



1858. On the Tendency of Varieties to Depart Indefinitely from the 

 Original Type. J. Proc. Linn. Soc, London, S, 53-62. 



Willett, G. 



1912. Birds of the Pacific Slope of Southern California. Pac. Coast 

 Avifauna, 7, 1-122. 



