432 On Indo-Chinese Hymenoptera. 



distinct longitudinal furrow on tlie anterior portion of the 

 median lobe ; notauli deep and finely crenulate, reaching 

 almost to the posterior margin. Scutellum convex, shining, 

 with sparse minute punctures ; a deep, broad, transverse 

 groove at tlie base, in which are three longitudinal carinse. 

 Median segment with two strong, parallel, longitudinal 

 carinae in the middle, on each side of which are two rather 

 lower parallel carinas, between the carinse are lower trans- 

 verse carinse giving the segment a coarsely reticulate 

 appearance ; on a slightly lower level is an oblique lateral 

 carina on each side just below the spiracle. Mesopleurse 

 sparsely and finely punctured. Abdomen smooth and 

 shining. Hind legs strongly punctured and pubesent, 

 tarsal ungues bifid. First abscissa of the radius shorter 

 than the second ; cubital nervure separating the first cubital 

 and discoid al 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. 



Hub. Vien Poukha, Haut Mekong, May 11, 1918. 1 ? . 



Euagathis dubiosus, sp, n. 



S . Flavo-testaceus ; flagello, abdoraino pedibusque posticis nigris ; 



alis fiavis, stigmate venisque flavis, macula parva prope basiu 



stigmatis uigra. 

 Long. 10 mm. 



^ . Face finely punctured, with a short median depression 

 below the base of the antennae, the lamellae between the 

 antennae small. Front only shallowly concave, tlie concave 

 area without marginal carinae, smooth and shining ; vertex 

 sparsely and very minutely punctured. Antennae about 

 12 mm. in length. Mesonotum closely and finely {junctured ; 

 the median lobe obliquely depressed anteriorly, with three 

 low carinae extending from the anterior margin to beyond 

 the middle, the apex of the lobe beyond the carinse smooth 

 and shining; notauli deep, not crenulate. A deep, broad 

 depiession, in which are three longitudinal carinae, at the 

 base of the scutellum ; postscutelluni longitudinally striated, 

 iVledian segment with a longitudinal carina above and an- 

 other below the large elongate s[)iracle, the dorsal surface 

 with a transverse basal depression and three almost parallel 

 longitudinal carinae, two oblique carinse on each side from 

 the basal depression almost reaching the lateral carina. 

 Abdomen smooth and shining, a small transverse depiession 

 on eaeh side at the base of the seccnd segment. Hind legs 

 vcj'y closely punctured : tarsal ungues bifid. Second cubital 



