118 Mr. P. Cameron on new Hymenoptera. 
base and apex; the apical four joints of the hinder tarsi are 
black. Abdomen black; a broad band near the apex of the 
basal segment, the second almost entirely, the third except 
for an interrupted black line at the apex and the apical 
segment, yellow; the basal ventral segments are for the 
greater part yellow. 
FOSSORES. 
CHRYSOLARRA, gen. nov. 
Recurrent nervures appendiculated or touching each other. 
Inner eye-margins with folds. Mandibles with an incision 
near the base. Pronotum placed below the level of the 
dorsulum. Median segment as long as the mesonotum, 
rounded behind. Pedicle of antennez pilose. -Base of ante- 
rior femora not emarginate near the base. Anterior tarsi 
armed with stiff, moderately long spines. Ocellus broad, 
triangularly dilated in front. Pygidium covered with stiff 
bristles and with longish stiff hairs. 
The presence of a fold on the inner eye-orbits separates 
this genus from Tachytes and Tachysphex; from Notogonia 
it may be known by the pygidium not being covered with a 
hoar-frost-like pubescence, but by a stiff pile and with longish 
stiff hairs. Characteristic is the fact that the recurrent 
nervures are united to each other, and not distinctly separated 
as in the other genera. The apical abscissa of the radius is 
oblique. In the hind wings the apical nervures are faint 
except the lower one. The legs are stout; the femora are 
distinctly narrowed towards the apex; the tarsi are longer 
and more slender than in Tachytes, the hinder are twice the 
length of the tibie; the metatarsus is twice the length of the 
second joint; the abdomen is also narrower and longer than 
in that genus. The pygidium is sharply margined. In the 
three known species the recurrent nervures are received near 
the apex of the basal third of the cellule. The eyes are 
large, reach near to the base of the mandibles, and converge 
towards the top. The hinder tibie are keeled behind. The 
pubescence on the four species is golden. 
Chrysolarra appendiculata, sp. n. 
Nigra, capite mesonotoque dense aureo pilosis; abdomine aureo 
balteato ; alis flayo-hyalinis, nervis flavis. 9. 
Long. 22 millim. 
Hab. Khasia Hills. Coll. Rothney. 
Scape of antenne on tlhe underside thickly covered with 
