ENTOMOLOGY. 73 



nursery inspection law, and also a list of nurseries which have been inspected in 

 Wisconsin. 



Catalogue of the exhibit of economic entomology at the Louisiana Pur- 

 chase Exposition, St. Louis, Mo., 1904, E. S. G. Tins and F. C. Pratt ( U. S. 

 Dept. Agr., Division of Entomology Bui. 47, pp. 155). — In the exhibit of the Division 

 of Entomology at the Louisiana Purchase Exposition an effort has been made to 

 illustrate the principal injurious insects of North America in all of their stages. Par- 

 ticular attention has been given to the economic relations of insects and special cases 

 have been prepared containing the models of the chief injurious insects. The bulle- 

 tin contains in detail a list of all species in the exhibit. 



Reading course in economic entomology, C. W. Woodworth {California Sta. 

 Circ. 10, pp. IS). — On account of the number of applications for information anil 

 instruction in economic entomology, an arrangement has been made to conduct a 

 reading or correspondence course in this subject as a part of the extension work of 

 the California State University. 



The readers who enroll for this course will be furnished with station bulletins 

 which will serve as text-books. The work accomplished in this way will be put to 

 the credit of the individuals who take the course and will be accepted as a part i if a 

 residence course upon subsequent matriculation at the university. Detailed direc- 

 tions are given on the guidance of students in the study of insects and in the use of 

 the literature to which they are referred. 



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

 et Nat. Bordeaux, 6. ser.,3 (1903), pp. 1-36). — Based upon extensive experiments and 

 observations the author has reaffirmed his opinion expressed in 1894 that insects are 

 not attracted to flowers by their color alone. 



After reviewing some recent literature regarding the attraction of insects by flowers, 

 an account is given of observations on the attraction of various species of Bombus, 

 Apis, Sphinx, etc., by plants growing under natural conditions, and of experiments 

 carried on with flowers grown under conditions capable of control. As a result it is 

 concluded that insects are guided from a distance to masses of flowers by their 

 perfume alone. Where flowers are grown singly insects are attracted generally by 

 color, and where the distance is small the odor also assists in attracting and directing 

 the movements of the flying insects. In the case of apetalous flowers the perfume 

 alone is a directive agent. 



Monograph of the genus Saperda, E. P. Felt and L. H. Joutel (New York 

 State Mils. Bui. 74, pp- 86, pis. 14, Jigs. 7). — A systematic account is presented of the 

 genus Saperda with notes on the subgeneric grouping, bibliography, distribution, and 

 specific relations. A list is given of the American species of the genus with a key for 

 their identification and a detailed description of each species. The American species 

 were compared with European and Asiatic forms. The habits, life history, natural 

 enemies, and means of combating the more important species are discussed in detail, 

 with references to the literature of the subject. 



The Mexican cotton-boll weevil, W. D.- Hunter and W. E. Hinds ( U. S. Dept. 

 Agr., Division of Entomology Bid. 45, pp. 116, pis. 16, Jigs. 6). — This bulletin con- 

 tains a detailed summary of all available information regarding the habits, life his- 

 tory, depredations, and means of control of the cotton-boll weevil. The authors give 

 an account of the destructiveness of the beetle and history of its introduction into 

 Texas. 



The insect is described in all of its stages and notes are given on the habits of the 

 larva and adults upon various parts of the cotton plant. Experiments carried out 

 for the purpose of determining whether other plants than cotton might serve as food 

 for this insect gave negative results. In these experiments various species of Hibis- 

 cus were used as well as sunflower, bindweed, pigweed, ragweed, etc. It is con- 



