BFRFAr OF ENTOMOLOGY AND PLANT QUARANTINE 59 
FOREIGN PARASITE INTRODUCTION 
During the year special effort has heen made to eliminate living host 
material from the shipments of natural enemies forwarded to the United 
States. This was largely accomplished in dealing with the parasites of the 
oriental fruit moth, the Japanese and Asiatic beetles, the pink boll worm, and 
the hessian fly. In these cases the results were highly satisfactory, and it 
is planned to extend this method to other activities. 
The principal hosts of the parasites imported and the countries in which 
the material was obtained were: 
Countries in 
which the material 
Insect hosts of the parasites : was collected 
Oriental fruit moth Japan. Chosen. 
Japanese and Asiatic beetles Do. 
European corn borer Italy. 
Pink bollworm Egypt. 
Alfalfa weevil Prance, Italy. 
Hessian fly France. 
Pine shoot moth Austria. 
Larch case bearer JJo. 
Birch leaf miner Do. 
Elm leaf beetle France, Italy. 
ORIENTAL FRUIT MOTH PARASITES 
A total of approximately 25,000 cocoons and 5,000 adults were forwarded 
during the year. Twelve species of parasites were secured from this material 
for liberation; the most abundant of these were Diodes molestae Uch., 
Phaeogenes nigridens Wesm., and Macrocentrus thoracicus (Nees). The suc- 
cess attending shipments of adults is illustrated in the case of a consignment 
of 4,096 Phaeogenes nigridens females forwarded in cool storage via Panama. 
This shipment reached the laboratory at Moorestown, N. J., 5 weeks later with 
less than 1 percent mortality. 
JAPANESE AND ASIATIC BEETLES 
The importation of parasites of these beetles from Japan and Chosen has 
continued on a small scale. Shipments were made of Tiphia popilliavora Roll., 
a larval parasite of the Japanese beetle, Tiphia sp. no. 29, parasitic upon the 
Asiatic garden beetle, and Tiphia sp. no. 6-b, parasitic upon the latter host 
and the imported serica. All of these were shipped in the adult stage. 
EUROPEAN CORN BORER PARASITES 
What is expected to be the last bulk shipment of corn borer larvae from 
Europe was collected in northern Italy in November and December 1934 and 
forwarded to the United States in January 1935. This comprised a total of 
1,113,000 field-collected larvae and was estimated to contain 17,000 Inareolata 
punctoria Roman, 107,000 Lydella grisesceas R. D., and 4,730 Eulimneria 
alkae E. and S. All of these are larval parasites already established in the 
United States and are to be used in extending the area of colonization. 
PINK BOLLWORM PARASITES 
Investigations of the parasites of this pest of cotton were started in Egypt 
in October 1934. Colonies of adult parasites of several species for rearing 
purposes were secured through the courtesy of the Egyptian Ministry of Agri- 
culture. Shipments were made of Microbracon kirkpatricki Walk., a promising 
parasite originating in east Africa, Exeristes roborator (Fab.), and Elasmus 
sp. All of these arrived in excellent condition and are now being reared in 
quantity at the laboratory of the Division of Cotton Insect Investigations at 
Presido, Tex. 
ALFALFA WEEVIL PARASITES 
Small shipments of alfalfa weevil parasites have been forwarded from France 
and Italy. A total of 1,720 adults of the egg parasite Peridesmia phytonami 
Gahan were forwarded to the California Agricultural Experiment Station dur- 
