358 EXPERIMENT STATION RECORD. 



leaf apparently thrive in napthalin. Bisulpbid of carbon, however, effectually 

 disposes of them. 



Determinate evolution in the color pattern of the lady beetles, R. H. John- 

 son {Carnegie Inst. Washington Pub. 122, pjp. lOlf, figs. 02). — A bibliography of 

 49 titles is appended to this account. 



The status of the cotton boll weevil in 1909, W. D. Hunter (V. 8. Dcpt. 

 Agr., Bur. Ent. Cire. 122. pp. 12. fig. 1). — At the end of the year 1909 all of 

 Louisiana was within the infested territory, while in Mississippi, Arkansas, and 

 Oklahoma, 23, 20, and 15 counties, respectively, were more or less infested. 



" Of the total cotton acreage in the States concerned, the weevil is found in 

 about 80 per cent in Texas, .30 per cent in Arkansas, 25 per cent in Mississippi. 35 

 per cent in Oklahoma, and practically 100 per cent in Louisiana. This area com- 

 prises very nearly 30 per cent of the cotton acreage in the United States in the 

 year 1909, or about 37 per cent of the total number of square miles found 

 within the cotton belt. . . . The season of 1909 was very peculiar as regards 

 damage by the boll weevil. . . . Experiments performed with many thousands 

 of weevils in large field cages showed a survival of about 3 per cent as against 

 12 per cent after the winter preceding the season of 1907. That is, about 4 

 times as many weevils survived to damage the crop in 1907 as in 1908. . . . 

 It was found that in the representative fields examined there was an average 

 of only 3 weevils per acre in northern, and eastern Texas in 1908 as against 

 226 per acre in 1907." As a result of the drought in 1909 the cotton plant was 

 so stunted that it was unable to derive any advantage whatever from the 

 comparative scarcity of the weevils. 



" In spite of the most unfavorable conditions the parasites caused a con- 

 siderable weevil mortality. The average total control of the boll weevil by its 

 insect enemies throughout the season of 1909 was 16 per cent. ... It is very 

 noticeable that the w^ork of the parasites in hanging squares was considerable. 

 It ranged in Texas from 46 to 54 per cent. That is, nearly half of the weevil 

 stages found in hanging squares were destroyed by natural enemies. ... 

 The list now includes 49 forms, of which 26 are parasites in the true sense — 

 that is, dependent upon the boll weevil for furnishing food for their young, 

 because their eggs are deposited upon the weevil — and 23 are predatory species, 

 which merely devour the boll weevil but do not deposit their eggs ur)on or 

 in It." 



The dispersion in 1909, history of the boll weevil in Texas, use of the chain 

 cultivator to carry the infested squares from shaded areas to the middles 

 where they are exposed to the sun. and the use of arsenate of lead in combating 

 the weevil as previously noted (E. S. R., 22, p. 756), are discussed at some 

 length. 



Studies of North American weevils, W. D. Pierce (Proc. U. 8. Nat. Mus.. 31 

 ilOlO), pp. 325-36-'i). — This paper includes descriptions of 12 new species of 

 t 'urculionidje. 



Brood diseases of bees, their treatment and the law for their suppression' 

 in Massachusetts, B. N. Gates {Bd. Agr. [Mass.]. Apiary lusp. Bui. 1. 1910, 

 pp. 12). — A popular account. 



The present status of our knowledge of African bees, H. Fbiese {Die 

 Bienen Afrihas nach dem Stande unserer heutigen Eenntnisse. Jena, 1909, pp. 

 85-475. pis. 2, fig. 1, viaps 19; rev. in Science, n. ser., 31 {1910), Xo. 798, pp. 

 .580-582).— Practically all that is known of the bee fauna of the Ethiopian 

 region south of a line drawn from Senegal to Abyssinia has been brought to- 

 gether in this work. 



A series of maps of Africa show the distribution of various species, while 

 other maps show the distribution throughout the world of important genera 



