472 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 2 



Species of the genus. This account is a contribution to the morphology both 

 of the Scolytidse in particular and of the Coleoptera in general. Then 

 follow remarks on the geographical distribution, ethological peculiarities 

 (Dr. Hopkins unfortunately prefers the words "physiological" and 

 "bionomic"), the range and limits of specific variation, progressive modifica- 

 tions within the genus and the coniferous host-trees that are infested by the 

 Dendroctoni. More than half of the technical bulletin is devoted to a minute 

 and orderly account of the species, their galleries, or excavations, broods, 

 distribution, and seasonable relations, with a full synonymy and bibliography, 

 making one of the most complete monographs ever published of a single 

 small genus of insects. The bulletin containing the matter of economic 

 importance is equally full and explicit. It embodies a great number of excel- 

 lent suggestions for the forester and abounds in careful observations, the 

 result of a practical experience extending over many years. The author 

 gives a number of striking instances of the control of Dendroctonus depra- 

 dations through attending to the proper time for beginning and ending 

 timber-cutting or for barking operations in our coniferous forests. He 

 shows how success in controlling the beetles must depend on a precise 

 knowledge of their developmental and seasonal peculiarities. Considerable 

 space is devoted to an account of the diseases and natural enemies of the 

 Dendroctoni. Then the species are taken up seriatim and the seasonal 

 history of each is given in detail, with an exhaustive account of its economic 

 features and a minute resumg of its bibliography and the basis of informa- 

 tion concerning its habits. The clear and profuse illustrations leave nothing 

 to be desired. The student of forestry entomology will find it advantageous 

 to bind both bulletins together so that they can be used as a hand-book. 

 The only criticism that may be offered is that the author should have pref- 

 aced the technical study, which appears as the first of a series, with a brief 

 account of the Scolytidifi in general. Such an introduction would have 

 been a great aid to the American student and would place the genus so 

 exhaustively treated in its proper perspective with relation to the other 

 genera of the family. This, however, is a rather unimportant omission. 

 All entomologists will congratulate Dr. Hopkins on his fine achievement and 

 desire that he may have the leisure and inclination to give us many similar 

 studies of other Scolytld genera. 



W. M. Wheeler. 



Third Annual Report of the Committee of Control of the South 

 African Central Locust Bureau, by Charles P. Lounsbury, Cape 

 Town, South Africa, p. 60 (1909). 



The report outlines the work that have been done during the past year 

 in controlling the locust plague by the different governments in South 

 Africa and includes the proceedings of the annual meeting at Cape Town, 

 which was attended by the representatives of most of the districts which 

 are suffering severe loss from these insects. The ofliclals concerned are 

 to be congratulated on the united and systematic efforts that are being 

 made to check the ravages of these pests. 



