424 



and Myziis rosarum occur on Rosa sp. Aphis rubiphila and Macrosiphum 

 rubicola have been collected from wild raspberry. A. spiraecola, 

 A. spiraephila, and Myzus spiraecola are found on Spiraea sp. 



WoRSHAM (E. L.). Regulations concerning tiie Mexican Cotton Boll 

 Weevil. — Georgia State Bd. Entom., Atlanta, Giro. no. 14, 15th July 

 1914, 6 pp., 2 plates, 1 map. [Received 6th July 1915.] 



The following regulations, adopted in June 1914, attempt to restrain 

 the spread of the boll- weevil, Anthonomus grandis. The quarantine 

 line in Georgia has been established 50 miles east of the hne established 

 by the State of Alabama and the U.S. Dept. Agric. at the end of 

 1913. The shipment into Georgia of cotton seed, seed cotton, hulls 

 and cotton pickers' sacks from infested territory or from any point 

 situated within 20 miles of infested territory is prohibited. Spanish 

 moss is not allowed to enter or pass through uninfested parts ot the 

 State, except during the months of July, August and September. 

 Specimens of cotton which are believed to contain any stages of the 

 weevil must be sent to the State Entomologist for examination and 

 must be enclosed in tightly wrapped, sealed packages. These rules 

 apply to the entire State of Georgia and to any other State as soon as 

 the weevil has been reported to be present. 



WoRSHAM (E. L.). The Mexican Cotton Boll Weevil. — Georgia State 

 Bd. Entom., Atlanta, Bull. no. 39, February 1914, 24 pp., 1 fig., 

 7 plates. [Received 6th July 1915.] 



Anthonomus grandis, the cotton boll weevil, reached, in the autumn 

 of 1913, a point about 6 miles from Georgia. The average rate of 

 extension of the pest is about 65 miles a year, and it is estimated that, 

 in 1916 or 1917, the weevil will become generally destructive in the 

 State. In Texas, in 1901, the loss from this weevil in 32 infested 

 counties was 100,920 bales ; in 1904, it had increased to 550,000 bales. 

 The weevil is restricted to the cotton plant, and passes the winter 

 in the adult stage, old cotton stalks, dead leaves, timber, etc., affording 

 shelter. A temperature below 12° F. is fatal to hibernating individuals. 

 The date of emergence varies from February to July. The first weevils 

 to emerge feed upon young seedlings, puncturing the stem at or just 

 below the attachment of the cotyledons. One of the first effects of 

 oviposition is the opening of the bracts and the exposure of the bud. 

 The larva hatches in about 4 days and feeds first on the immature 

 pollen in the centre of the square, then on the pistil and other tissues 

 of the bud. Many eggs are laid in bolls, and the larvae from these 

 feed on the seeds and occasionally on the immature fibres. During 

 the summer, the average length of the larval stage is 8 days. The 

 pupal period varies from 2-14 days. Ten generations may occur in 

 one season. Adults of any generation may hibernate on the approach 

 of cold weather. During spring and summer, there is a continual flight 

 of weevils from plant to plant. In autumn, large numbers make flights 

 of considerable length to seek new feeding grounds, the yearly increase 

 in distribution taking place at this time. The weevil may be pre- 

 maturely carried into uninfested territory in cotton seed and cotton 

 seed products, in wagons, railways, or on clothing. Among predaceous 



