ENTOMOLOGY. 175 



gives the regulations under which plants may be introduced into South Africa, dis- 

 cussing them at some length. 



Preparation and use of fungicides (Chron. Agr. Canton Vaud, 17 > 1904), No. 

 10, pp. 311-315). — Directions are given for the preparation of Bordeaux mixture, 

 Burgundy mixture, and neutral and adherent verdigris, the quantity of each fungi- 

 cide to be used, time for its application, etc., being indicated. 



ENTOMOLOGY. 



The attraction of colors and odors for insects, J. Perez {Mem. Soc. Sci. Phys. 

 et Nat. Bordeaux, 6. ser.,3 {1903) , pp. 1-36) . — Observations were made on honeybees, 

 bumblebees, syrphus flies, and many other insects for the purpose of determining 



the influence of the odor and color of flowers upon the visitation of insects. It was 

 found that bees do not always confine themselves to any one species of plant during 

 a given flight. Such is the case especially when pollen is being collected. In 

 Hymenoptera other than bees, it was observed that the insects confined their atten- 

 tion largely to one family of plants. 



Injurious insects, E. Fleutiaux {Agr. Prat. Pays Chauds, 3 ( 1903), Nos. 14, pp. 

 241-252; 15, pp. 372-376; 3 {1904)., Nos. 16, pp. 405-502; 17, pp. 623-627, figs. 6).— 

 Descriptive and economic notes are given on various insects injurious to sweet pota- 

 toes, cassava, chickpea, beans, sorghum, cocoanut, cacao, banana, and other tropical 

 plants. 



Insects injurious to cultivated plants, F. Corboz {Chron. Agr. Canton Vaud, 

 17 {1904), No. 11. pp. 338-341). — Notes on the injurious effects and means of com- 

 bating brown-tail moth, Cossus ligniperda, Hybernia defoliaria, Agrotis segetum, etc. 



Insect injuries to hardwood forest trees, A. D. Hopkins ( U. S. Dept. Agr. 

 Vearboo'k 1903, pp. 313-328, pi. 1, figs. 17).— The author discusses the habits, life his- 

 tory, and means of combating a number of the most important insect enemies of 

 hardwood trees. The hickory-bark beetle may be controlled by cutting and burn- 

 ing the bark of infested trees before the middle of May of each season. The oak- 

 hark beetle is to he controlled by felling infested trees, removing the hark from the 

 trunks, and burning the branches. Notes are also given on cherry-bark beetle, two- 

 lined chestnut borer, oak-timber worm, carpenter worm, etc. 



Powder-post injury to seasoned wood products, A. D. Hopkins i U. S. Dept. 

 Agr., Division <;/' Entomology Circ. 55. pp. 5). — The character of the injury caused by 

 so-called powder-post beetles ami the extent of losses thus produced are briefly 

 described. The damage of this sort is caused by several species of insects which 

 burrow in seasoned wood. In general the winter is passed in the dry wood. The eggs 

 are deposited in the spring and the larva' begin work at once. Sapwood which has 

 been stored in one place for 2 or more years and manufactured wood articles are 

 most frequently injured. 



In preventing losses from these pests it is recommended that infested pieces of 

 wood and lumber he destroyed or treated with kerosene, or by steaming or subjec- 

 tion to dry heat. It is also suggested that lumber yards be frequently inspected to 

 detect the presence of the insect. 



Catalogue of exhibits of insect enemies of forests and forest products at 

 Louisiana Purchase Exposition, St. Louis, Mo., 1904, A. D. Hopkins f U. S. 

 Dept. Ayr., Division of Entomology Bui. 48, pp. 56, ph. 22). — The object of the exhibit 

 is to show the most important forest insects and the nature of their injuries to trees 

 and woods. The exhibit is classified according to geographical distribution and sys- 

 tematic position of the host plants and insects. 



Some insects that attack fruit trees in the spring, T. B. Symons {Maryland 

 Sta. Circ I!nl. 57, pp. 8, figs. !>). — Attention is called to the necessity of making care- 

 ful observations in the spring in order to prevent the ravages of injurious insects 



