Annual report . 1909.] PUBLIC DOCUMENT--No. 73. 61 make their utility in this country very problematical, but thereare a few among them which are of greater promise than anyothers among the numerous natural enemies which have beenstudied at the laboratory. The work clone by Mr. Townsend has demonstrated the ex-istence of a very great diversity in the life of these insectsduring their earliest stages; and the results of this work haveserved not only to indicate the best methods by which the para-sites themselves may be imported and handled after receipt,but have tended strongly to indicate the
Annual report . 1909.] PUBLIC DOCUMENT--No. 73. 61 make their utility in this country very problematical, but thereare a few among them which are of greater promise than anyothers among the numerous natural enemies which have beenstudied at the laboratory. The work clone by Mr. Townsend has demonstrated the ex-istence of a very great diversity in the life of these insectsduring their earliest stages; and the results of this work haveserved not only to indicate the best methods by which the para-sites themselves may be imported and handled after receipt,but have tended strongly to indicate the enormous possibilitiesfor good possessed by certain among them. Probably the most promising at the present time is onetechnically known as Blepliaripa scutellata, a large and stronginsect, not unlike the common fly in general appearance. Thefemales of this species deposit several thousands of exceedinglyminute eggs upon the foliage of trees near where the caterpillarsof the preferred host are feeding. These eggs
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Keywords: ., bookauthormassachusettssuperint, bookcentury1900, bookdecade1900
