Appendix to the Journals of the Senate and Assembly of the ..session of the Legislature of the State of California . 106 REPORT OF THE COMMISSIONER OF a serious pest. Mr. Craw discovered this parasite in the neighborhoodof Los Angeles, where he collected a large number of the beetles, andfound that fully one third were parasitized. He found them in thelarval state in the beetles as early as May and as late as the middle ofOctober. The May brood pupate early in June and remain in this con-dition about two weeks, when they change to the winged form. Theyare numerous in July and Au
Appendix to the Journals of the Senate and Assembly of the ..session of the Legislature of the State of California . 106 REPORT OF THE COMMISSIONER OF a serious pest. Mr. Craw discovered this parasite in the neighborhoodof Los Angeles, where he collected a large number of the beetles, andfound that fully one third were parasitized. He found them in thelarval state in the beetles as early as May and as late as the middle ofOctober. The May brood pupate early in June and remain in this con-dition about two weeks, when they change to the winged form. Theyare numerous in July and August. Masicera pachytyli, Sk. (Fig. 15.) This is one of the Tachnid flies,the whole of which family are parasitic on other insects. They are of medium size generally, andto a casual observer resembleour common house flies. Thefavorite food of the greaterpart of the members of thefamily are the female lays her eggs onthe soft bodies of the caterpil-lars and the young grubs de-vour their host, which neverattains its mature state. Itis to this family that the re-duction of moths and butter-flies below the danger limitis due. The one of which we
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