9. Collections from the Western States and Territories beyond the 

 Mississippi River, made by Lieut. W. L. Carpenter, attached in 187.'» to 

 Professor Hayden's Geological Survey of "the Territories, and during the 

 same season by Mr. T. L. Mead, and during the summer of 1875 by myself in 

 Colorado and Utah, under the auspices of Professor Hayden's Survey. Col- 

 lections from Colorado, from Mr. J. Ridings, and the Department of Agri- 

 culture at Washington, and in Lawrence, Kans., by Prof. F. H. Snow of the 

 University of Kansas. 



10. Very large collections in fine order from the Pacific States, received 

 from Messrs. Henry Edwards and James Behrens, with the collections made 

 in Victoria, Vancouver's Island, and California, by the late Mr. G R. Crotch, 

 and now contained in the Museum of Comparative Zoology, together with a 

 number collected in California by Mr. Alexander Agassiz, and a few received 

 from Mr. Junius Holleman. To all these institutions and gentlemen, as well 

 as to any others who may have been omitted in this enumeration, are due my 

 sincere thanks. 



Good collections of European generic types have been received through 

 the kindness of Professor P. C. Zeller and Dr. 0. Staudinger. These have 

 been indispensable to me, and saved me some mistakes otherwise unavoid- 

 able. 



While in France in 1872, M. Guenee most generously threw open his 

 entire collection of this family for my inspection and comparison of speci- 

 mens, taken with me for the purpose, with his types. I am also indebted to 

 the late Dr. J. E. Gray, and Mr. Frederic Smith of the British Museum, for 

 the privilege of examining Walker's types. The species thus examined with 

 European and other types are indicated in the synonymy thus : !!!. Those 

 species recognized by me at sight, but not compared, are indicated by a 

 single mark of exclamation. I have also had drawings made of the remain- 

 ing types of the late Mr. Walker, with the kind permission of Dr. A. Giinther, 

 keeper of the zoological department of the British Museum, the work of the 

 artist having been kindly superintended by Mr A. G. Butler, assistant in the 

 museum. By the liberality of these gentlemen I have been enabled to 

 identify all of Walker's types now to be found in the British Museum ; for 

 several species, stated by him as being in the national collection, were not to 

 be found. Descriptions of those species of Guenee and Walker, which I 

 have been unable to determine, but which I have seen and regard as good 



