U. S. D. A., B. E. Tech. Ser. 19, Pt. II. Issued April 30, 1910. 



TECHNICAL RESULTS FROM THE GIPSY MOTH PARASITE LABORATORY. 



n. Descriptions of Certain Chalcidoid Parasites. 



By J. C. Crawford, 

 Assistant Curator, Division of Insects, U. S. National Museum. 



INTRODUCTION. 



The new species described in this paper came from material 

 imported from Japan and Europe for the purpose of rearing parasites 

 of the gipsy moth and the brown-tail moth. The work of rearing 

 these parasites is conducted at the Gipsy Moth Parasite Laboratory, 

 now situated at Melrose Highlands, Mass. 



In the study of these parasites a Zeiss binocular microscope has 

 been used with magnifications of from 24 to 35. In cases where the 

 description states that the series includes more than one specimen of 

 each sex the description is drawn from one specimen of each sex, and 

 any variations in the other specimens, which are designated as para- 

 types, are cited. 



In considering the genus CTialcis it has been deemed desirable to 

 display in a synoptic table not only all of the species of this genus 

 which have been introduced purposely as parasites of the gipsy moth 

 or the brown-tail moth or accidentally included in shipments of para- 

 site material, but also all of the species of the genus known to occur 

 in the United States. In the same way it has been deemed desirable 

 to publish a table separating the common American form from the 

 two species of the genus HypopteroTnalus accidentally included in 

 shipments of parasite material, and also to separate in a synoptic 

 table the different Japanese species of the genus Pleurotropis which 

 have three funicle joints. As pointed out, P. atamiensis belongs 

 probably to an undescribed genus. 



Family CHALCIDID^E Walker. 



STabfainily CH^^LCIUIN^gC Howard. 



Tribe CHALCIDINI Asl-in:veaci. 



Genus CHALCIS Fabricius. 



Since some of the species of CTialcis from Europe and Japan are 

 being introduced into this country, it appears best to give a table of 

 all of the species of the genus known to occur in the United States 

 and to include in this table the exotic species which are involved. 



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