On the Hymenoptera of the Georgetown Museum. 165 
part of the mesopleurz, the basal third becoming gradually narrowed obliquely 
below, its apex obliquely rounded, the usual conical mark behind the hind wing 
and a large, oblique oval mark on the apical two-thirds of the metapleure, 
yellow. Wings hyaline, the-nervures and stigma black, the transverse median 
nervure received shortly behind the transverse basal. Female. 
Length 13 m.m.; terebra 2 m.m. 
The 7th to 13th joints of the antenne are white. The face and clypeus are 
strongly, but not closely punctured, the sides of the raised central part almost 
striated ; the front strongly irregularly obliquely striated, a stronger keel runs 
down from the ocelli. Mesonotum somewhat strongly punctured, the punctures 
closer round the furrows, which are crenulated. Base of metanotum sparsely, 
not very strongly, punctured; there are two keels down the centre; the 
top im the centre beyond the keel is finely obliquely striated, the strie 
converging between the spines; the rest strongly, not closely, trans- 
versely striated. Metapleure strongly obliquely striated, the strie on the 
apical part more oblique, stronger and more widely separated than they are on 
the base. There is a Y-shaped striated space on the propleure. Mesapleure 
irregularly, obliquely striated below the tubercles ; the basal part finely punc- 
tured ; the apex crenulated ; the deprsssion on metapleure more widely so. 
Mesostenoideus unilineatus, sp.n. 
Black, the palpi, tubercles, metanotal spines and a band, narrowed in the 
middle white, a brownish line on the sides of the petiole at the apex; the anterior 
legs obscure testaceous, their coxe black to near the apex, the top of the femora 
and the tarsi infuscated, the middle coxe, basal joint of the trochanters bright, 
the femora of a darker red, the apex of the femora narrowly and the hind tibie 
and tarsi black ; the hind legs black, the cox and basal joint of trochanters red, 
the femora dark red at the base ; the apical half of the basal joint of the hind 
tarsi and the second, third and fourth joints white. Wings hyaline, the stigma 
and apical nervures fuscous, the basal black, the areolet small, square, the 
transverse basal nervure interstitial. Female. 
Length 10 m.m. ; terebra, 2. m.m. 
Opaque, alutaceous, the matanotum finely, closely reticulated, the apical 
slope transversely in the middle, the sides more strongly obliquely striated. 
Propleural furrow striated, the apex with a narrower striated belt ; the meso- 
pleura finely, closely obliquely, striated, the strie more or less intertwining and 
becoming stronger towards the apex on the upper apical half ; the metapleure 
similarly, but somewhat more strongly striated. Mesosternal furrow widened 
towards the apex, strongly crenulated. 
Mesostenoideus cratodontus, sp.n. 
Black, the face, clypeus, labrum, palpi, basal third of mandibles, the eye orbits 
all round, the line widened on the outer side below, a line on the pronotum, 
tegule, a triangular mark on the apex of the middle lobe of mesonotum, tegule, 
the scutellums, the metanotal teeth, a line, widened at the apex, on the lower 
