On the Hymenoptera of the Georgetown Museum. 329 
Monophadnus trichiotomus, sp.n. 
Testaceous, the antenne, head, mesonotum, mesosternum, the apical 3 seg- 
mentsof the abdomen and the tarsi black, the hinder tibie darker coloured, 
infuscated towards the apex ; wings fuscous, the stigma and nervures black, the 
3rd abscissa of the radius distinctly shorter than the 2nd, angled near the base 
of the apical third where the transverse radial nervure is received ; the Ist 
recurrent nervure is received at the apex of the basal third, the 2nd in the basal 
fourth. Female. Length 5 m.m. 
There is a longish, flat fovea in the centre below the ocelli, with a smaller, 
deeper, wider than long one, on either side of the apex of the latter ; the ocellar 
region is raised, but not bounded by distinct furrows. The legs are paler 
coloured than the body. 
Perreyia ruficollis, sp. n. 
Dark blue, the head with the blue colour less distinct, the antenne black, the 
prothorax, the middle lobe of mesonotum, the outer sides of lateral, the meso- 
pleuree, mesosternum, the 4 anterior cox and trochanters, the anterior 
femora and the anterior tibie in front, rufous ; wings large, fuscous, tinged with 
violaceous, the nervures and stigma black ; the 2nd abscissa of the radius one- 
fourth shorter than the 3rd ; the Ist recurrent nervure is received two-thirds 
of the length of the 1st transverse cubital nervure from the latter, the 2nd very 
close to the 3rd ; the Ist recurrent nervure is broadly, roundly curved. The 
mandibles are broadly red. Antenne densely covered with short stiff black 
hair ; 12-jointed, the 3rd joint of equal width, nearly as long as the following 2 
united ; the 4th thinner and longer than the 5th not much narrowed at the base, 
the 5th a little longer than the 6th widened towards the apex, the 6th distinctly 
longer than wide, narrowed towards the base, the 7th shorter, narrowed to- 
wards the base, the 8th and 9th of equal length, longer than wide, the last 2 
thinner, of equal width, the last thinner and a little longer than the penulti- 
mate, its apex rounded. Female. Length 11 m.m. 
Legs densely covered with short, stiff black pubescence ; the face and clypeus 
thickly with longer black stiff hair. Smooth and shining. Middle lobe of 
mesonotum with a distinct furrow down the middle. The hind femora below 
are tinged with rufous. 
This species belongs to Brachytoma, West, which does not seem to be separable 
from the older Perreyia, Brulle. 
OPIIN2. 
Stiropius, gen. n. 
Radius springing from behind the middle of stigma ; 2nd abscissa of radius 
shorter than the 2nd transverse cubital ; transverse median received beyond 
transverse basal ; recurrent in Ist cubital cellule, anal nervure issuing from the 
bottom of the nervure, almost interstitial. Occiput not margined. Metano- 
tum and basal 2 abdominal segments keeled down the centre, the Ist segment 
twice wider at the apex than at the base, if anything wider at the base than at 
