182 Pli CEEDING S OF THE NA TIOXA L If USE UM. VOL. xx. 



Arizona, Palmer; Fort Whipple, Yavapai County, Arizona, Palmer 5 

 Arizona, Burrisou (Museum Comparative Zoology); Flagstaff, Coco- 

 niuo County, Arizona, Cordley (L. Bruner) ; Las Cruces, Donna Ana 

 County, New Mexico, Cockerell; Colorado (U.S.N.M. Riley collec- 

 tion; C. P. Gillette; S. Henshaw); Fruita, Mesa County, Colorado 

 (U.S.N.M. Kiley collection); Beaver Brook, Colorado, 6,000 feet; Salt 

 Lake, Utah, Packard; Salt Lake Valley, Utah, 4,300 feet; American 

 Fork Canyon, Utah, 9,500 feet; Provo, Utah County, Utah; Spring- 

 Lake Villa, Utah County, Utah, Palmer; Douglas, Converse County, 

 Wyoming (U.S.N.M. Riley collection); Evanston, L^inta County, 

 Wyoming, 6,800 feet; Fort McKiuney, Johnson County, Wyoming 

 (U.S.N.M. Riley collection); Yellowstone National Park; Beaver 

 Canyon Eoad, Idaho; Yellowstone, Montana (U.S.N.M. Riley collec- 

 tion); Putnam, Custer County, Montana, A. Sloggy (same); Eldorado 

 County, California, 4,000 feet, Gissler; Uniatilla, Oregon, Henshaw 

 (Museum Comparative Zoology); The Dalles, Wasco County, Oregon, 

 Heushaw (same); Washington, Morrison (S. Heushaw); Camp Uma- 

 tilla, Washington, Heushaw (Museum Comparative Zoology) ; Preston's, 

 Klikitat Lone Tree, Yakima River opposite Elleusburg, Yakima 

 River Olmstead's, near Ellensburg Nelson's, Yakima River Yakima 

 City and Brown's, Colville Valley, Washington, Heushaw (same); 

 British Columbia, Crotch (Museum Comparative Zoology) ; explorations 

 in Arctic America and Yukon River, Alaska, R. Kennicott; Laggan, 

 Alberta, Bean ( S. Henshaw ; S. H. Scudder) ; Banff and Calgary, Alberta, 

 Beau (S. Henshaw) ; Fort McLeod, Alberta (U.S.N.M. Riley collection ; 

 L. Bruuer). 



The published accounts add very little to the above range of distri- 

 bution, except that it is reported from Quebec (Provancher), northern 

 California (Packard), Nevada (Scudder), and south as far as middle 

 Florida probably by error (Packard). 



It is probable, therefore, that it is found in every part of the continu- 

 ous district of the United States, excepting in the southernmost Atlantic 

 States and most of California, being thus limited very much as M.femnr- 

 rubrum ; it extends also into central Mexico, and north of our boundary 

 is found from Atlantic to Pacific as far at least as latitude 50 (except- 

 ing Newfoundland), and on the Pacific side reaches north to the Yukon 

 River and probably the Lower McKeuzie. 



Next to M. spretus this is our most destructive locust, and east of 

 the Mississippi probably the only one ever doing much damage. Its 

 injuries, however, are not for a moment to be compared with those 

 inflicted by J/. spretus, for, though possessing good powers of flight 

 and on rare occasions known to migrate in swarms, its injuries can only 

 be classed as local, and they are never so serious as those inflicted by 

 M. spretus ; nevertheless they are by no means slight, and immense 

 destruction of grain is to be laid at its door. Bruner, who has studied 

 this insect over a wide extent of country, says that " while it occurs 

 over ... an extended territory, it appears to be ... partial to liilh 



