432 On Indo-Chinese Hymenoptera. 
distinct longitudinal furrow on the anterior portion of the 
median Jobe; notauli deep and finely crenulate, reaching 
almost to the posterior margin. Scutellum convex, shining, 
with sparse minute punctures; a deep, bread, transverse 
groove at the base, in which are three longitudinal carine. 
Median segment with two strong, parallel, longitudinal 
carine in the middle, on each side of which are two rather 
lower parallel carinz, between the carine are lower trans- 
verse carine giving the segment a coarsely reticulate 
appearance ; on a slightly lower level is an oblique lateral 
carina on each side just below the spiracle. Mesopleurs 
sparsely and finely punctured. Abdomen smooth and 
shining. Hind legs strongly punctured and _ pubes:ent, 
tarsal ungues bifid. First abscissa of the radius shorter 
than the second ; cubital nervure separating the first cubital 
and discoidal cells obsolete, except at the base; second 
cubital cell quadrate, the second transverse cubital nervure 
with a feeble angle above the middle. Radial cell reaching 
almost halfway from the apex of the stigma to the apex of 
the wing. 
Hab. Vien Poukha, Haut Mékong, May 11, 1918. 1 9. 
Euagathis dubiosus, sp. n. 
¢. Flavo-testaceus; flagello, abdomine pedibusque posticis nigris ; 
alis flavis, stigmate venisque flavis, macula parva prope basin 
stigmatis nigra. 
Long. 10 mm. 
3. Face finely punctured, with a short median depression 
below the base of the antenne, the lamellz between the 
antennz small, Front only shallowly concave, the concave 
area without marginal carinze, smooth and shining ; vertex 
sparsely and very minutely punctured. Antenne about 
12mm. inlength. Mesonotum closely and finely punctured ; 
the median lobe obliquely depressed anteriorly, with three 
low carine extending from the anterior margin to beyond 
the middle, the apex of the lobe beyond the carinz smooth 
and shining ; notauli deep, not crenulate. A deep, broad 
depression, in which are three longitudinal carine, at the 
base of the scutelium ; postscutellum longitudinally striated. 
Median segment with a longitudinal carina above and an- 
other below the large elongate spiracle, the dorsal surface 
with a transverse basal depression and three almost parallel 
longitudinal carinz, two oblique carine on each side from 
the basal depression almost reaching the lateral carina. 
Abdomen smooth and shining, a ciel trausverse depression 
on each side at the base of the seccnd segment. Hind legs 
very closely punctured ; tarsal ungues bifid. Second cubital 
