Notes on Some Chiggers (Acarina: Trombiculidae) 
from Southern Korea^ 
E. W. Jameson, Jr., and Seiichi Toshioka^ 
The following account is based upon 
specimens collected by members of the 207th 
Preventive Medicine Survey Detachment and 
.the 37th Preventive Medicine Survey Detach- 
ment in southern Korea. It is undoubtedly 
incomplete, and the sampling may be selec- 
tive: the hosts examined came mostly from 
agricultural areas and near dwellings. Despite 
the inevitable shortcomings of such a pre- 
liminary survey, this account will serve as a 
beginning for a study of the trombiculid 
fauna of Korea. 
The area covered by this paper is slightly 
beyond that discussed by Womersley (1952) 
in his voluminous work on chiggers of the 
Asiatic-Pacific area; and this account is, in a 
small measure, a supplement to the much 
larger one by Womersley. Six species of chig- 
gers were described from regions to the north 
of Korea by Schluger (1948), and two of 
those species have been collected in southern 
Korea. Pertinent to this account is the ap- 
parently heretofore largely overlooked paper 
^ Studies upon which this paper is in part based 
were conducted under Contract No. DA-49-007-MD- 
242, between the Regents of the University of California 
and the Department of the Army. The work was ini- 
tiated while the senior author was associated with the 
406th Medical General Laboratory and the Far East 
Medical Research Unit in Japan during the period 
January-October, 1952. Logistical support for the prep- 
aration of the specimens and illustrations was supplied 
by the U. S. Army Hospital, 8164th Army Unit, by 
special arrangement with the above-mentioned or- 
ganizations. 
2 Department of Zoology, University of California, 
Davis, California, and Department of Entomology, 
406th Medical General Laboratory, Tokyo, Japan, re- 
spectively. Manuscript received March 9, 1953. 
by Kanda, mentioning two species of chig- 
gers from Korea. 
There are reported here several species pre- 
viously known only from Japan, two species 
described by Schluger from more northerly 
regions of the Asiatic mainland, and one 
species known also from North America. Two 
species are described as new in this paper. 
There is in preparation an illustrated account 
of Japanese chiggers, and the Japanese species 
known from southern Korea are not re- 
illustrated in this paper. 
The illustrations in this paper were made 
in Kyoto, Japan, and are the work of Mr. 
M. Endo, Mr. S. Shibata, Mr. A. Shimazoe, 
and Mr. K. Daishoji. These artists were under 
the direct supervision of Mr. K. Yamazaki. 
The bulk of the material collected was 
mounted by Miss Y. Yoshida. 
We would like to express our appreciation 
to Major Paul W. Oman, MSC, under whose 
direction and encouragement this work was 
done; to Dr. James M. Brelinan for profes- 
sional council in this study; to Professor Ha- 
rujiro Kobayashi for calling our attention to 
and loaning us a copy of the paper by Kanda; 
and to Lt. Col. Robert Traub, MSC, for a 
photostatic copy and translation of the paper 
by Schluger. 
Key to the Chiggers of Southern Korea 
1. Anteromedian scutal seta absent 
Gahrliepia hrennani var. ventralis 
Anteromedian scutal seta present (single 
or double) 2 
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