22 
PACIFIC SCIENCE, Vol. VIII, January, 1954 
Trombicula (Neotrombicula) japonica 
Tanaka et al., 1930 
Trombicula autumnalis japonica Tanaka, Kaiwa, 
Teramura, and Kagaya, 1930. Zentbl. f. 
Bakt. 116: 353. 
DIAGNOSIS: Palpal femoral, genual, and ven- 
tral tibial setae feathered; lateral tibial seta 
forked or nude; dorsal tibial seta nude. Galeal 
seta usually nude, sometimes forked. Sen- 
sillary bases approximately on a line with 
posterolateral setae. Basal third of sensillae 
nude; distal two thirds plumose. Dorsal setae 
rather long; usually two pairs of humeral 
setae. Scutal measurements of a specimen 
from southern Korea: AW-81, PW-94, SB-33, 
ASB-35, PSB-31, AP-33, AM-65, AL-55, 
PL-75, S-88. 
DISTRIBUTION AND HOSTS: Widely distrib- 
uted and common in Japan; previously not 
known outside Japan. In Korea taken near 
Yonchon from Kattus norvegicus and Apodemus 
agrarms. 
TYPE DATA: Described from Microtus monte - 
helloUP) taken at Yuzawa, Akita Prefecture, 
Japan. 
Trombicula (Neotrombicula) nagayoi 
Sasa et al., 1950 
Trombicula nagayoi Sasa, Hayashi, Sato, Miura, 
and Asahina, 1950. Tokyo Iji Shinshi 
67(12): 14. 
DIAGNOSIS: The gnathosomal features of na- 
gayoi are similar to those of japonica, but there' 
are usually fewer branches on the palpal setae. 
Sensillary bases distinctly forward of a line 
connecting posterolateral setae. Dorsal satae 
shorter than m japonica and with more barbs. 
A single pair of humeral setae. Scutal meas- 
urements of a specimen from southern Korea: 
AW-70, PW-91, SB-31, ASB-31, PSB-28, AP- 
33, AM-45, AL-40, PL-60, S-74. 
DISTRIBUTION AND HOSTS: Previously 
known only from Japan where it is common 
and widely distributed. From southern Korea 
there are five specimens from 2 miles south- 
east of Yonchon from Apodemus agrarius. 
TYPE DATA: From Apodemus speciosus, Ya- 
manashi Prefecture, Honshu, Japan. Holo- 
type deposited at the Institute for Infectious 
Diseases, University of Tokyo. 
Trombicula (Neotrombicula) sp. Kanda 
Trombicula sp. Kanda, 1942. Chosen Nat. 
Hist. Soc., Jour. 9(37): 174. 
Kanda illustrated leg III of a chigger but 
did not identify or describe this species. From 
the presence of 1 mastifemorala III, 1 masti- 
tibiala III, and 2 mastitarsalae III, this species 
belongs in the microti group of Brennan and 
Wharton. This species is possibly T. pomeran- 
zevi Schluger, 1948, or T. microti Ewing, 1928, 
both of which have been taken in Manchuria 
by Dr. Kiyoshi Asanuma. 
