Hymeneptera from the Khasia Hills. 267 
the tarsi spinose; the apex of the hinder femora reaches to 
the middle of the third segment. The transverse basal 
nervure is interstitial; the stump of a nervure on the disco- 
cubital is longer than usual. The base of the median 
segment is broadly obliquely depressed in the middle; it is 
smooth, flat, and shining, and is bordered on the top by a 
distinct keel. 
There are two lateral arez on the base of the median 
segment; the spiracular area is bounded by a not very 
distinct keel. The second abdominal segment is striated. 
Belongs to the Joppini, and comes near to Trogus. I 
unfortunately only know the male. 
Achaius flavo-balteatus, sp. n. 
Black ; the greater part of the head, the edge of the pro- 
notum, a mark in the middle of the mesonotum, the scu- 
tellums, tegule, the areola and posterior median areze on the 
metanotum, the lower part of the propleuree (broadly behind, 
narrowly in front), a large mark (irregularly narrowed be- 
hind) on the lower half of the mesopleurz at the base, an 
oblique mark under the hind wings, and a large mark on the 
base of the metapleure (extending beyond the middle) lemon- 
yellow. Legs yellow, the lower part and sides of the hinder 
coxee, the hinder trochanters, the base and apex of femora, 
and apex of tibiz, black. Abdomen black ; the apices of the 
first and second segments, two large marks on the apex of 
the third, two smaller ones on the apex of the fourth, the 
ventral keel, and the apices of the second and third ventral 
segments, lemon-yellow. Wings violaceous hyaline, the 
stigma and nervures black. <¢. 
Length 17 mm. 
Hab. Khasia. Coll. Rothney. 
Antenne black; the scape yellow below; the flagellum 
yellowish beneath and for the greater part above to near the 
middle. Front and vertex broadly in the middle, the occiput, 
and the upper half of the outer orbits, black. Face and 
clypeus closely and rather strongly punctured all over and 
covered with short white pubescence ; the ocellar region and 
the upper part of the front in the middle are stoutly obliquely 
striated. Mandibles black, the base obscure yellow. Palpi 
lemon-yellow. Mesonotum closely punctured all over, 
Pleurz closely punctured, the apex of the propleure striated ; 
the mesopleure striated in the middle and stoutly crenulated 
behind ; the apex of the metapleurz stoutly rugose; the lower 
part smooth and projecting into a keel. Petiole above 
