Indo- Chinese Hymenoptera. 89 
fuscatis ; alis flavo-hyalinis, anticis apice leviter infuscatis, venis 
nigris, 
Long. 17 mm. 
9. Clypeus finely punctured, transverse at the apex, 
labrum broadly rounded and sparsely covered with pale hairs. 
Head punctured-rugose, a little swollen behind the eyes ; 
vertical area broader than long, the lateral furrows distinct. 
Eyes very distinctly convergent towards the clypeus. An- 
tenne nine-jointed ; fourth and. fifth joints subequal, com- 
bined about equal in length to the third. Thorax rather 
closely punctured ; scutellum strongly convex, obliquely 
sloped from the base, rather abruptly truncate posteriorly, 
Propodenm with a longitudinal carina in the middle at the 
base; the basal tergites smooth, the fourth and two following 
tergites rather closely punctured on the sides. Hind coxee 
rather long; hind femora stout, scarcely reaching to the apex 
of the abdomen ; joints of the hind tarsi distinctly arcuate 
beneath, the hind metatarsus about equal in length to the 
four apical tarsal joints combined ; tarsal ungues strongly 
bifid. Humeral cell divided far beyond the middle by a 
strongly oblique nervure ; basal nervure half as far from the 
base of the cubitus as that is from the base of the radius. 
Hab, Chapa, Tonkin, May and June 1916. 
This.is congeneric with Siobla mooreana, Cam., the type 
of Stobla, which belongs to the Tenthredinine, and is allied 
to Macrophya, though well distinguished by the oblique 
dividing nervure of the humeral cell. The genus is identical 
with Encarsioneura, Konow, which must sink. 
Colochelyna fulva, sp. n. 
@. Fulvo-ochracea ; flagello, articulis primo toto secundoque basi 
exceptis, tibiisque tarsisque posticis nigris; mandibulis flavis, 
apice nigris ; clypeo, labro, propodeo, tibiisque tarsisque anticis 
intermediisque flavis; alis flavis, venis fulvis, 
Long. 17 mm. 
@?. Head narrower than the thorax; clypeus broadly 
truncate at the apex; eyes converging moderately towards 
the clypeus, very narrowly separated from the base of the 
mandibles ; third joint of the antenne nearly as long as the 
three following joints combined, the joints beyond the fourth 
eradually decreasing in length; vertical area half as broad 
again as long. Head and thorax closely punctured and 
clothed with very short golden hairs; the vertical area 
divided by a low longitudinal carina ; scutellum strongly 
