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Pennsylvania 
Pennsylvania 
New Jersey 
Pennsylvania 
Pennsylvania 
MUSHROOMS 
A.SfUNGUS GNAT ( Sciara sp*) 
C. A. Thomas (May 7): Larvae of sciarid flies have caused 
considerable d?jnage to cultivated mushrooms in Chester County 
this season. 
MUSHROOM MITE ( Tyroglyphus lintneri Osborn) 
C. A. Thomas (May 7): The mushroom mite has Deep, very 
abundant and destructive in a number of mushroom houses in 
Chester County during the past winter. 
A MITE ( Linopodes antennaepes Banks) 
C. A. Thomas (March): During March, 1931, several houses 
heavily infested with this mite were found near Plainfield. 
In two houses the mushrooms were all killed, and many hundreds 
of these mites were present. 
A SPRING-TAIL ( Achorutes armatum Nic) 
C. A. Thomas (May 7)': Springtails have caused considerable 
damage to cultivated mushrooms in Chester County this season. 
' A NOCTUID ( Metalestra quadrisignata Walk.) 
C. A. Thomas (May 7): Occasional examples have "been noted 
of injury to cultivated mushrooms in Chester County by a a'octuid 
"looper,'" M. quadrisignata . These are brought into the mushroom 
house with the casing soil in the fall. The caterpillars eat 
lTvrge holes into the caps, but the injury is ■ .usually not 
extensive and they soon disappear. 
