February, '13] ENTOMOLOGISTS' PROCEEDINGS & 



Your committee desires to commend the practice now gaining in 

 favor of basing recommendations for control of definite insect species 

 on extensive tests under normal field conditions, and to deplore the 

 continuance of the early practice of basing measures of control on 

 merely a study of life economy. 



Additions to the List Submitted in Preliminary Report 



Note. In a recent letter, Dr. C. Gordon Hewitt, the Dominion Entomologist, 

 requests a con*ection in the manner of reporting dominion government projects, 

 fearing the method used in the preUminary report might lead the ordinary reader to- 

 think he personally is carrying out all of the projects. As a matter of fact Doc- 

 tor Hewitt says that those projects are being carried on by various members of 

 the Division of Entomology of Canadian Department of Agriculture. 



Investigations dealing with Acarina 



Montana, Bozeman, — R. A. Cooley. 



179. Tick investigations in Montana with particular reference to Dermacentor 

 venustus. 



Investigations dealing with Orthoptera 



Minnesota, St. Anthony Park,— F. L. Washburn. 



180. Grasshopper control. 



181. Factors in the control of Acrididse of economic importance. C. W. Howard 

 in immediate charge. 



182. Life histories of Orthoptera. C. W. Howard in immediate charge. 



Investigations dealing with Hemiptera 



Montana, Bozeman, — R. A. Cooley. 



183. Life history and control of the sugar beet louse {Pemphigus betae). 



184. Study of the control of the oyster shell scale by use of insecticides. 

 Peru, S. A., Lima, — Charles H. T. Townsend. 



185. White scale of cotton {Hemichionaspis minor) and its parasites. 



About 9 species of microhymenopterous parasites are at work in force on H. minor- 

 in Piura department, 2 species of coccinellids, 1 or more species of mites, and 1 fun- 

 gus, and the host shows marked signs of decrease at present in consequence. In 

 Peru the scale is still confined to Piura department. 



186. Coccids and microhymenopterous parasites of the same in Peru. 



Several hundreds of lots of coccids have been collected and thousands of parasites 

 reared, some two or three hundred slides of latter having been prepared and studied. 

 Many hundreds of microhymenoptera have been collected, and many mounted and 

 studied. 



Washington, Pullman, — A. L. Melander. 



187. Resistance of the San Jos4 scale to insecticides. 



While it may be premature to announce that the San Jose is developing resistant 

 strains in certain localities, yet it is not improbable to assume this. It is certain 

 that the effect of standard sprays varies greatly from place to place, and that the 

 scales of certain districts seem to be acquiring a progressive immunity. I have been 

 working on this for quite a few years now but have withheld a public announcement 

 up to the present. Formerly the sulphur lime was almost a panacea, certainly de- 



