-34Q- 
:rjs:-~:0CM5 
A MITE ( Lino ;oo.cs anteanagoeg Banks) 
OMo 0. E. Gahm (September 1C) : This mite v?as found August 
29 doing serious damage to cultivated mushrooms. It re- 
duced the yield in one mushroom plant approximate!" three- 
fourths of a pound per sonar e foot of bed space over an 
area of 325,000 so. ft. 
Illinois 0. 2. Gahm (September 10): This mite ••■'as found on June 
24- doing commercial damage to mushrooms in the houses at 
laperviilo. 
Minnesota 0. 3. G-ahm (September 10) : *7as found doing commercial 
damage to cultivated mushrooms in the sandstone caves along 
the Mississippi River in the vicinity of St. ?av.l end Min- 
neapolis Jul" 5. 
©Ti5?S (Myeetophilida.e) 
Illinois 0. 2. C-ahm (September 10): Perigus gnats, Phora sp. , 
r ;ere abundant in the mushroom houses at reperville June 24. 
Minnesota 0. Z. G-ahm (September 10): A fungus gna t , Sciara s >. , 
was found infesting mushrooms, in the sandstone caves along 
the Mississi ppi P.iver in the vicinity of St. Paul and Min- 
neapolis Jul;" 5. 
SP2IIXK. . J (Collemboiji) 
Minnesota 0. 3. Gahm (September 1C) : Spring tails ••'ere found doing 
commercial damage to cultivated mushrooms "hich are being 
grov/n in the sandstone " eaves along the Mississip pi Hive? 
in the vicinity of St. Paul and Minneapolis. (Determined 
by Dr. "olsom. as Achorates ' sp. , heretofore unde scribed in 
this c cum try. 
Missouri 0. 3. Gahm (September 10): Several specimens of spring- 
tails -'ere receive:, from a. mushroom groucr at Leeds May 1. 
These -ere collected from cultivated mushrooms and " r ere de- 
termined by Dr.. "olsom as Schotteiia sp. , "hie":: species ac- 
cording to Dr. "olsom has not been collected hereto:': ore in 
this country. 
