464 Annals Entomological Society of America [Vol. IV, 



throughout the district between Pocatello, Idaho, and Ogden, 

 Utah, including the large and fertile Cache Valley; and to the 

 northwest the lower Bear River and Malad valleys. It has 

 reached the south-west portion of Wyoming at Evanston and 

 Cokeville (H. Smith, 1911), and has been found by Mr. Parks 

 also of the Bureau of Entomology, and by Mr. E. P. Hoff 

 around Bear Lake as far north as Fishhaven, Idaho. There 

 is little food along the Union Pacific railroad for many miles to 

 the east. Westward it has practically reached its limit in the 

 State of Utah, but trains will soon carry it on to the fields of 

 Nevada. 



The original Summit and Wasatch county infestations are 

 probably due as much to the moving of camp equipments of the 

 sheep-herders as to any other means. Altitude seems not to 

 affect the weevil and they can probably breed wherever alfalfa 

 can grow, since I have taken larvae and adults as high as 9,000— 

 9,500 feet in the Wasatch Range. It was probably from this 

 region that they reached Evanston and Lyman, Wyoming. 



As with other species of which the life history is known, the 

 beetles are good fliers and distribute themselves readily in this 

 manner. How long these flights may continue is not known, 

 but from the inspection of various districts into which they are 

 moving it is at least possible for them to fly ten to fifteen miles. 

 With this species there are two periods of flight, one in early 

 spring soon after they issue from hibernation, and the other 

 shortly after the adults of the year are appearing in their greatest 

 numbers. The relation of these flights to their life-history may 

 be better understood by consulting the life-history chart in Bui. 

 110, Utah Exp. Sta. The sense of concealment for protection 

 gives the weevil additional opportunity for distribution since 

 they crawl into any sheltered place. They are often found in 

 fruit packages that are being shipped. Moving of household 

 goods, or in fact any form of freight may give them an oppor- 

 tunity to reach another locality. It is not unusual to find 

 them on the passenger trains going through the infested district 

 and thus they may reach east to the fields of Colorado, Kansas, 

 and Nebraska, and west to Arizona, California, Nevada, Wash- 

 ington and Oregon. 



There is practically no danger of distribution in alfalfa seed 

 shipped out of the state, since the weevils even if present, would 

 be screened out in cleaning. At present they do not occur in 

 any region growing seed commercially. 



