276 STATE BOARD OF AGRICULTURE. 



as bad as it was last year. Some few jfields in southern Michigan have 

 suffered, but the situation as a whole seems to be markedly improved. 

 The foregoing refers to the common wheat joint-worm, Isosomn tritici. 

 The more serious species known as the sheath joint-worm, (Isosomn 

 imginicola) on the other hand produced comparatively few parasites in 

 our cages, although it was not so widely distributed, being confined more 

 especially to the eastern part of the State. The work of this species shows 

 i( to be still plentiful — possibly worse than in 1918. Several large fields 



are reported as practically woith- 

 less this year, while no one se^'ms 

 to find any improvement. To sum 

 up tlic situation the common joiiit- 

 wonii is being rapidly destroyed 

 by its parasites and the wheat 

 sheath joint-worm is spreading some- 

 what, owing to the delay in th(^ ar- 

 rival of its own particular parasites. 

 The svu'vey of pathogenic para- 



Dilropinonis fa/rcoca if/ ('.s. with ovipositor in- sitCS of food auimals is prOgrCSS- 

 serted in wheatst:aw, enlarged, original). ^^g satisfactorily and thus far there 



has been no necessity for senthng 

 out to get material; that sent in for examination and the material ob- 

 tained from post-mortems through cooperation with the Department of 

 Pathology has supplied as much material as could be utilized. It ap- 

 pears that during the pursuit of this inquiry a few new records for the 

 United States have been established. 



During the year the following publications have been put out by the 

 section : 



Special : 



"Spray and Practice Outhne for 1919"— H. J. Eustace and R. H. Pet- 

 tit. 



Circular : 



"Foul Brood"— B. F. Kindig. 



Press Bulletins: 



"House-flies and Influenza" — Doctor W. L. Chandler. 

 "Onion Maggot"— R. H. Pettit. 



The following articles have been contributed to the Experiment Station 

 Quarterly by the section: 



"Stomach Worms in Sheep"— Dr. W. L. Chandler. 



"Heat Insulators for Bee-hives" — R. H. Pettit. 



"Entomological Notes" — R. H. Pettit. 



"Round Worms in Swine" — Doctor W. L. Chandler. 



"New Pests for Which We Should be on the Look-out"— R. H. Pettit. 



"Ox-warbles"— Doctor W. L. Chandler. 



"Periodical Cicada"— R. H. Pettit. 

 On July 1, 1918, Doctor W. L. Chandler became a member of the 

 Section of Entomology of the Experiment Station, having the title of 



