VISIT TO PACIFIC COAST. 21 



Prof. O. S. Westcott, of Chicago, also made a trip for us to this State 

 during the month of August, while Prof. R. L. Packard, of the Patent 

 OfBce, visited the State earlier, in order to make some chemical experi- 

 ments. 



The Commissioners met and held a third meeting in Chicago, 111., 

 August 7-8, for consultation and the transaction of necessary business. 

 After planning for field-work for August and September they separated, 

 to meet again on the 1st of October. Mr. Packard started west, reaching 

 Salt Lake August 12; thence he went through Nevada, obtaining new 

 facts about fresh invasions of locusts from Idaho, stopping at Eeno, and 

 I thence, by way of Lake Tahoe, where the species of locust destructive 

 in California was observed, he went to Portland, Oreg., tracing in the 

 Shasta Yalley and about Portland the small form allied to the Eocky 

 Mountain locust. Going up the Columbia Eiver to The Dalles and to 

 Wallula, information was obtained regarding the western limits of the 

 Eocky Mountain locust and recent invasions in Eastern Oregon and 

 Washington Territories of this locust. 



Eeturuing to San Francisco by way of Victoria, Vancouver's Island, 

 where collections were made of locusts allied closelj^ to the Eocky 

 Mountain species, considerable information was received at Merced, 

 Stockton, and places along the road to the Yosemite Valley, regarding 

 the ravages of the Calo])temis atlanis^ the destructive locust of Califor- 

 nia, and, from observations made in the mountains, as well as on Mount 

 Shasta, at the northern extremity of the Sierra Nevadaj it was definitely 

 ascertained that swarms of the Eocky Mountain locust have probably 

 never flown over that range from the plains east, and that the damages 

 done locally on the Pacific coast have been most probably committed by 

 Caloptemis femur rubrum and (7. atlanis, conjointly or separately, both 

 of these species conjointly causing similar losses in the Atlantic States. 

 Mr. Packard returned to Salem on October 4. 



The results of this journey may be summed up as follows : Definite 

 information was obtained concerning the invasion of Northern Nevada 

 and Eastern Oregon and Washington Territory by swarms of the genu- 

 ine Eocky Mountain locust, and all of the swarms were traced with a 

 good degree of accuracy to the Snake Eiver Valley, in the vicinity of 

 Boise City and northward and souteastwardly. The western limits of 

 the Eocky Mountain locust were definitely ascertained to be near the 

 meridian of 120°, extending alon g the limits of this line from latitude 58° 

 to 370. It is most i^robable that while this locust may occasionally, in 

 Washington Territory and Oregon, fly to the eastern flank of the Cas- 

 cade Eange, and in California as far as the eastern flank of the Sierra 

 Nevada, swarms never pass over those mountains. (For detailed notes 

 of this journey, see App. 10.) 



During the last days of August and first of September Mr. Thomas 

 again visited the Northwest in order to consult with his assistants, bring 

 together the data obtained, and arrange it in reference to the report. 

 The meeting was held at Sioux City, Iowa, after which Mr. Thomas, ac- 



