Vespoidea of Micronesia. 3 1 
Keizo Yasumatsu 2 
In 1938 Professor Teiso Esaki recorded the 
occurrence of a mutillid wasp in Micronesia 
for the first time. This handsome mutillid 
was identified by him as Timulla (Trogaspi- 
dia) albertisi (Andre, 1896), although he 
felt some suspicion with respect to the iden- 
tity of certain details of the pubescence. In 
the spring of 1949 Professor Esaki requested 
me to re-examine this mutillid specimen. 
After a careful study of the specimen, as well 
as of the descriptions of some related species, 
I came to the conclusion that the specimen 
represents a new species, as pointed out by 
Dr. Krombein (Hawaii. Ent. Soc., Proc 13, 
1949). 
Timulla (Trogaspidia) esakii sp. nov. 
1938 Timulla (Trogaspidia) albertisi Esaki 
(nee Andre), Annot . Zool. Jap. 17: 
431-432, 
1949 Timulla sp., Krombein, Hawaii Ent. 
Soc., Proc. 13: 369, 375-376. 
Female. 10.5 mm. long. Head, thorax, and 
abdomen entirely black. Median portion of 
mandibles, antennal tubercles, and apex of 
antennal scapes ferruginous. Front clothed 
with sparse, erect, pale pubescence and some- 
what dense, recumbent, ferruginous pubes- 
cence. Vertex covered with thick, appressed, 
pale or somewhat ferruginous pubescence, 
but not distinctly "echancree en arc en avail Y 
as in albertisi Genae with somewhat thick, 
recumbent, pale pubescence. Mandibles slen- 
der, edentate at apex and with a small tooth 
1 Results of Professor T. Esaki’s Micronesia Ex- 
peditions, 1936-1940,, No. 79. 
2 Entomological Laboratory, Faculty of Agricul- 
ture, Kyushu University, Fukuoka, Japan. Manu- 
script received July 21, 1949- 
on inner margin near apex. Clypeus elevated 
posteriorly, elevated margin arcuate and with 
a very small tubercle just at the middle of 
the margin, median longitudinal line of ele- 
vated area ridged; anterior margin of clypeus 
straight. Antennal scape almost impunctate; 
third antennal segment about twice as long 
as fourth. Antennal scrobes carinate above. 
Malar space about as long as wide. Front, 
vertex, and genae with moderate, dense, con- 
fluent punctures. Apical half of malar space 
almost impunctate, but basal half minutely 
wrinkled. Relative width of head and thorax 
(mesonotum) about 37:32. Dorsum of 
thorax clothed with sparse, erect, pale pubes- 
cence and sparse, recumbent, somewhat fer- 
ruginous pubescence. Pale pubescence on 
dorsum of anterior portion of pronotum thick 
and erect. Posterior face of propodeum with 
somewhat dense, long, erect, pale pubescence. 
Pleural area with pale or whitish micropubes- 
cence. Dorsum of thorax with moderately 
large, dense, confluent punctures; humeral 
angles angulate but inconspicuous; pronotum 
slightly wider posteriorly than anteriorly; 
mesonotum only faintly narrower than pro- 
notum; lateral margins parallel and crenu- 
late; scutellar scale present, distinct and 
slightly raised; lateral margins of posterior 
face of propodeum denticulate. Anterior mar- 
gin of propleurae defined by distinct carina; 
all of pleural areas, including sides of propo- 
deum, impunctate. Abdominal tergites II, IV, 
and V covered with ferruginous black, vel- 
vety pubescence; laterobasal areas of second 
tergite and basal and apical margins of fourth 
and fifth tergites without such velvety pubes- 
cence; second tergite with a pair of large, 
subcircular, anterior spots separated by about 
their own transverse diameter; third tergite 
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