...vast area ronghly designated by the following boundary-lines: On the cast, the one hundred and third meridian : on the south, the south line of Colorado...in the -northern part being expanded indefinitely ea,-t шн! west. Now for the proof. While connected with the United States Geological Survey, under...

...designated by the following boundary-lines: On the cast, the one hundred and third uiciidiau; ou the snnth, the south line of Colorado and Utah ; on the west,...the northern part being expanded indefinitely east ami west. Now for the proof. While connected with the United States Geological Survey, under Dr. Hayden,...

...ronghly designated by the following boundary-lines : On the cast, the one hundred and third ineiidian ; on the south, the south line of Colorado and Utah...British America ; the northern line being somewhere iu British America — even this area in the northern part being expanded indefinitely east and •west....

...position to tell whether it is possible or not to devise any preventive measures. Their hatching ground is known to extend over the vast area roughly designated...with the United States Geological Survey, under Dr. Hayden, for four years, I travelled over a large portion of this area, traversing it on various lines...

...exterminating these insects by destroying their eggs and young in their native haunts. meridian ; ou the south, the south line of Colorado and Utah ; on...America; the northern line being somewhere in British America—even this area in the northern part being expanded indefinitely east and west. Now for the...