OF WASHINGTON, VOLUME XIV, 1912. 93 



thought that on the whole the publication was to be commended 

 and that the original generic work and tables would prove 

 very useful. The studies appeared to be based on sound lines, 

 undesirable characters in the separation of genera being 

 carefully avoided. The work is privately printed, presumably 

 in small edition, so that it may be liable later to become 

 scarce and difficult of access. 



-Mr. Schwarz called attention to a new entomological per- 

 iodical "Entomologische Mitteilungen," just issued, the organ of 

 the Deutsche Entomologische Museum. The first number- 

 gives an interesting account of the difficulties with which 

 the new institution had to contend before its permanent 

 organization was accomplished. Besides the usual number 

 of entomological articles it gives a photographic reproduction 

 of the Deutsche Entomological Museum, which, by the way, 

 is the only public, exclusively entomological museum hitherto 

 built. This museum was founded by the late Prof. Dr. 

 Kraatz and is the property of the municipality of Berlin, 

 Germany, but under independent administration. The lead- 

 ing spirit of this museum is Dr. Walther Horn, the lifelong 

 friend of Dr. Kraatz. He is the well-known authority on the 

 family Cicindelidse and his visit to Washington will be pleas- 

 antly remembered by many of our Society. 



Mr. Pierce stated that he had been interested for about 

 eight 3'ears in the subject of insect dispersion. The boll 

 weevil is controlled by the intensity of cotton cultivation. 

 In heavy producing regions the weevils move 5 to 10 miles 

 in a year, but where cotton is less extensively cultivated the 

 movement may be as high as 120 miles. The extensive de- 

 foliation of cotton in 1911 by the cotton-leaf caterpillar 

 Alabama argillacca brought about a condition in heavy 

 producing areas similar to the normal condition in sparsely 

 cultivated country. As the consequence the weevil moved 

 in the Delta region 50 to 60 miles. Swamp and lake regions 

 may cause the weevils to fly 50 miles before finding cotton. 

 In 1904 the Red River Valley limited the dispersion because 

 of the heavy growth of cotton, which satisfied the weevils. 



Mr. Pierce also spoke of barriers to dispersion. Dryne.ss 

 and altitude have proved effective barriers to the boll weevil. 



