APPENDIX TO THE REPORT OF THE SECRETARY. 77 



ley," and consists of Part First of an extensive work upon I^orth Ameri- 

 can Oi nitbology, by Dr. Elliott Cones, U. S. A. Both these treatises 

 have become indispensable to the students of the special branches of 

 which they respectively treat. 



The Bulletins of the survey have appeared during the year with the 

 usual regularity, the four numbers issued in 1878 forming volume IV. This 

 publication is nosv established as a regular annual serial, and the pres- 

 ent volume, like its predecessors, contains articles on a wide range of 

 scientific topics embraced within the general scope of the operations of 

 the survey. 



The United States Entomological Commission, conducted under tlie 

 auspices of thit* survey, has during the year issued its first annnal re- 

 port, as an octavo volume of nearly 800 pages, with plates and wood- 

 cuts. It is devoted to the subject of the Eocky Mountain Locust, and 

 contains a full exhibit of the results secured by the commission ap- 

 pointed to investigate that important iiroblem. 



UNITED STATES GEOGRAPHICAL SURVEYS WEST OF THE ONE HUN- 

 DREDTH MERIDIAN, IN CHARGE OF FIRST LIEUT. GEORGE M. 

 WHEELER, CORPS OF ENGINEERS, UNITED STATES AR3IY. 



The work duriug 1878 was performed by nine main parties and three 

 astronomical parties, which operated in the States of California, Colo- 

 rado, ]!:^evada, Oregon, and Texas, and Arizona, New Mexico, and Vv^ash- 

 ington Territories. Forty-six observers took the field, leaving a small 

 force at the Washington office engaged in the preparation of maps and 

 reports. The astronomical parties, in charge of Professor T. F. Salford, 

 at the Ogden Observatory, Mr. J. H. Clarke in the California sections, 

 and Mr. Miles Bock in the Colorado section, made observations at 

 Walla- Walla, Washington Territory ; the Dalles, Oregon; Fresno, Cali- 

 fornia ; Fort Bliss, Texas ; and Fort Bayard, New Mexico, connecting 

 with Ogden as the initial meridian. 



In California, topographical parties occu])ied points in the Cascade 

 Mountains and ranges to the eastward within the Great Interior Basin 

 extending towards the Blue Ridge, reconnoitring a large area. Opera- 

 tions were carried southward from Lake Tahoe along the Sierra Nevada, 

 one party occui)ying the White IMountain Bange and connecting with 

 the triangulation which joins the astronomical station at Austin, Nevada,- 

 A contour survey of the Washoe mining region was comj^leted, and 

 numerous details gathered relating to the operations of the vertical and 

 meridional sections of the lodes. 



Work for completing the topography of the section between Sierra 

 Neviida and Cascade Ranges was also carried on. From the southern 

 end of the Sierra Nevada a party transferred from the Utah section 

 connected with the work of 1S75 from Los Angeles east and nortli. and 

 operated along the Coast Range to latitude oO^ 30' N. - 



In Colorado, one party, following the Rio Grande northward, lilled in 



