. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California. this time they may have spread over the interiorvalleys of the State, and entered upon their career of parasitizing theirhosts, which would account for the apparently sudden disappearance ofthe grasshoppers in many localities where they had been numerous andwhere fears of damage were entertained. It is to be hoped that this mayprove true, and if so it will be another instance of the great value of theefforts of this Board in obtaining predaceous and parasitic insects tofight
. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California. this time they may have spread over the interiorvalleys of the State, and entered upon their career of parasitizing theirhosts, which would account for the apparently sudden disappearance ofthe grasshoppers in many localities where they had been numerous andwhere fears of damage were entertained. It is to be hoped that this mayprove true, and if so it will be another instance of the great value of theefforts of this Board in obtaining predaceous and parasitic insects tofight our injurious pests, such as the Vedalia cardinalis, which provedeffective against the cottony-cushion scale, and the Rhizohius ventralisand Scutellista cyanea, effective against the black scale. This fly {Masicera pachytyli, Sk.), which isrepresented in the accompanying cut, belongs tothe order Diptera, the same as our commonhouse fly, which it resembles. It has a bristlyappearance and is formidable looking, because ^^ Fig. 4. A. Larva of dipterous fly,parasitic on plaguelocust; magnified. Al. Same, natural
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Keywords: ., bookauthorcaliforn, bookcentury1800, bookdecade1850, bookyear1853
