34 



THE REPORT OF THE 



No. 33 



Foreign Parasites of Porthetria dispar L. and Euproctis chrysorrhcea L. Liberated in America 

 First column of figures shows the number of parasites of foreign origin actually liberated. 

 Second column of figures shows the number of parasites subsequently liberated. 

 Third column of figures shows the total number of parasites liberated. 



Name of Parasite 



Foreign 

 stock 



New England 

 stock 



Totals 



A nastatus bifasciatus Fonsc 



*Apanteles f ulvipes Hal 



Apanteles lacteicolor Vier 



Apanteles melanoscelus Ratz 



Apanteles solitarius Ratz 



Blepharipa scutellata R. D 



Carcelia gnava Meig 



Chalcis flavipes Panz 



Compsilura concinnata Meig 



Crossocosmia sericariae Corn, and C. flavascutellata 



Shiner 



Dexodes nigripes Fall 



Ephialtes examinator Fabr. and E. compunctor L. . 



Eudoromyia magnicornis Zett "... 



Eupteromalus nidulans Foerst 



Hyposoter disparis Vier 



Masicera silvatica Fall ". 



Meteorus versicolor Wesm 



Pales pavida Meig 



Parasetigena segregata Rond 



Parexorista chelonice Rond 



*Schedius kuvance How 



Tachina japonica Towns 



Tachina larvarum L 



*Telenomus phatenarum Nees 



*Trichogramma, spp 



Tricholyga grandis Zett 



Zenillia libatrix Panz 



Zygobothria gilva Hartig 



Zygobothria nidicola Towns 



Totals 



138,680 

 87,040 

 55,000 

 23,000 

 22,546 



5,109 

 15,788 

 20,154 



9,000 



700 



5,212 



402 



4,568 



354,000 



12,543 



23 



3,113 



582 



1,187 



9,742 



f45,382 



471 



2,036 



4,650 



76,000 



8,766 



161 



7,502 



3,500 



53,032,500 



245,666 



58,508 



71,081 

 104,83 i 



7,697 



20,206,091 



53,171,180 

 87,040 



300,000 

 81,984 

 22,546 

 76,190 

 15,788 

 20,154 



113,831 



700 



5,212 



402 



4,568 



354,000 



12,543 



23 



10,810 



582 



1,187 



9,742 



20,251,473 



471 



2,036 



4,650 



76,000 



8,766 



161 



7,502 



3,500 



917,633 



73,725,708 



74,643,341 



Some of these species were new to science and, in the case of most of them, 

 the life history and habits had not been thoroughly investigated. This has re- 

 quired much work in order that they might be handled with the greatest 

 effectiveness. 



Time will not permit a discussion of the value of the individual species con- 

 cerned, but a few points should be mentioned to illustrate the importance of 

 having full information concerning the biology of natural enemies. 



Calosoma sycophanta feeds upon caterpillars and pupae of numerous insects, 

 but particularly on the gipsy moth. The adults climb trees freely where they 

 do most of their feeding. In New England there are several native species of 

 Calosoma that are good climbers and their larvae are also predaceous. The 

 reason why 'Calosoma sycophanta is more effective than any of the native species 

 as an enemy of the gipsy moth is because the larvae of this beetle are able to 

 climb trees that have rough bark and feed upon gipsy moth caterpillars or pupae 

 that may be massed on the trunks or at a point where the limbs branch therefrom. 



f These 45,382 Schedius were developed at the laboratory in seven generations from twelve 

 adults which were obtained from Gipsy Moth eggs from Japan. 



* Species marked with asterisk were greatly increased in number by breeding at laboratory 

 before colonizing. Species in italics are positively established. 



