DEPARTMENT REPORTS. 125 



iiiatic's throughout the year. Other dejiartments of the College, as well as the 

 Department of iMathematics, have availed themselves of these lectures. 



The total number of students taking mathematics during the j'ear was 

 1,595, divided among the different terms as follows: Fall, 468; winter, 548; 

 spring, 460; summ.er, 113. The total number of class periods for the year 

 was 413, divided among the different terms as follows : Fall, 130 ; winter, 121 ; 

 spring, 107; summer, 55. 



Respectfully submitted, 



L. C. PLANT. 



Professor of Mathematics. 



East Lansing, ^Michigan June 30, 1921. 



REPORT OF THE DEPARTMENT OF ENTOMOLOGY. 



President F. S. Kcdzie, 

 Dear Sir: 



Following is a l-ricf rcj ort of the work of the Department of Entomology 

 for the year er.dirg Jure 30, 1921. 



During the year ef 1920 and '21 one new instructor Avas taken into the 

 department, Mr. L. 0. Gcntrcr, v. ho comes here from the University of 

 Wisconsin, where he served as special agent for the Federal Bureau of Entom- 

 ology, working or truck-garden insects. 



Mr. J. L. L. Frank has occupied the position of half-time graduate assistant, 

 being assigned ftr the year to parasitology. 



On August 1st the writer Avas given leave of absence until the follo-\ving 

 November for the purpose of collecting in Florida. During that time the 

 work was in charge of JVIiss E. L jNIcDaniel, who ably carried on all the extra 

 duties occasioned by the absence of the Avriter. 



During the year the following courses were given : 

 Summer term 1920 : 



Ent. I — Introductory. 



Ent. V — Classification of insects. 



Fall term, 1920. 



Ent. Ill — Field crop insects. 



Ent. Va anel b — Classification of insects. 



Ent. VIII — Parasitology. 



Ent. IXa — Apiculture, elective. 



Ent. Xb — Apiculture, (option). 



Ent. 100— Graduate work. 



Ent. 101 — Graduate work. 



Winter term, 1921: 



Ent. XII — Systematic entomology. 



Ent. IV — Forest insects. 



Ent. Xc — Apiculture (option). 



Ent. XI — Household insects. 



Ent. Va and b — Studj^ of scale insects. 



Ent. 100 — Graduate work. 



Ent. 101 — Graduate work. 



