EXPERIMENT STATION REPORTS. 275 



523. i 



.524. /El-Vampiro. Manufactured by Allaire Woodward & Co., Peoria, 111. Guaranteed Pyrethrum 



531. ) flowers 85%, Inert ingredient 15%. Pyrethrum was identified in all samples. 



527. Nichols Bed Bug Powder. Manufactured by Chas. H. Nichols & Co., Chicago, 111. 

 Guaranteed Pyrethrum powder 25%, Inert ingredient 75%. Pyrethrum identified. 



588. Evan's Kill Em Quick. Manufactured by Evans Manufacturing Co., Battle Creek Mich. 

 Guaranteed Pyrethrum flowers 95%. 



Insert ingredients 5%. 

 Pyrethrum Identified. 



REPORT OF THE ENTOMOLOGICAL SECTION. 

 Director R. S. Shaw : 



Dear Sir: Following is a brief report of tlie work of the Division of 

 Entomology for the year ending June 30, 1920. 



The season of 1920 seems to be a banner j^ear for all sorts of insect 

 troubles. 



During the year, there have been no changes in personnel of the regu- 

 lar salaried members of the section of Entomology. Additional help be- 

 came necessaiy in order to carry on an investigation on codling moth and 

 Mr. L. J. Bottimer has been employed during part of June to make this 

 possible, also the title of Miss Eugenia McDaniel was recently changed 

 to Research Assistant in Entomology. 



During the year just completed there has appeared a bulletin on the 

 Lecania of Michigan, which has been, for some time in the hands of the 

 printer. This bulletin, by the writer and Miss Eugenia M<;Daniel, places 

 on record the results of many years of collecting. The genus Lecanium 

 belongs to the soft scales and the species offer special difficulties in their 

 recognition. To this genus belongs the so called New York Plum scale, 

 the Apricot scale; a species on grape, the large soft scale of peach, and 

 the terrapin scale of peach. All of which together with others, look very 

 much alike except to the specialist. It is hoped that the bulletin will 

 help to make more reliable and accurate any experiments to be carried 

 on in the future. Besides this, several articles by members of the sec- 

 tion, have appeared in the Quarterly and in the Journal of the American 

 Association of Economic Entomologists. 



A Parasitological j)roblem which has been successfully pursued during 

 the past year is the treatment of intestinal protozoal diseases of man 

 and domesticated animals with Neoarsphenamin. The results of these 

 investigations have pointed out a method for successfully treating in- 

 testinal diseases which have heretofore been considered incurable. Also, 

 primarily of interest to agriculture, it appears that it may, as the result 

 of this work, be possible, not only to control through medicinal treat- 

 ment, epidemics of intestinal protozoal diseases of both man and food 

 animals under conditions Avhere control through sanitary methods would 

 be difficult if not impossible. An opportunity has also been presented 

 for determining the pathogenic importance of numerous various species 

 of protozoa which infest the intestines of domesticated animals. A 

 paper by Dr. Chandler and Dr. Carr of Lansing reporting the successful 

 treatment of "Trench diarrhoea" (Giardiasis) in man with Neoarsphen- 

 amin was published in the May 12th issue of the Journal of the American 



