On the Hymenoptera of the Georgetown Museum. 321 
Agathis quyanensis, sp.n. 
Bright red, the antenne, head pro-and mesothorax, the 4 front legs except 
the tarsi, which are dark testaceous, the apex of the hind tibie and the tarsi 
black, wings hyaline to the 1st transverse cubital nervure, fuscous beyond ; 
the basal nervures pallid testaceous, the apical fuscous ; the costa dark testace- 
ous, the stigma black in front, fuscous behind ; the 2nd cubital cellule slightly 
narrowed in front. Basal part of metanotum with 3 stout longitudinal keels ; 
the central 2 closer to each other ; at the base they are parallel, straight, beyond 
they slightly diverge ; the others are wider apart from each other and from the 
central ; they do not converge ; the spave between them is strongly transversely 
striated. Pleural furrows strongly crenulated ; the space below the outer keel 
on the metanotum is crenulated ; there are some longer oblique stri# on the 
lower part of the metapleure. In the centre of the apical slope of the metano- 
tum is a large triangular area united to the apex by 2 short straight ones. An 
oblique keel issues from the outer side of the lower ocellus and 2 irregular 
diverging ones from its lower side. Pleur densely covered with long, white 
hair ; thelegs are densely, more shortly, pilose. 
Disophrys pilipes, sp.n. 
Rufous, the antennx, head mesopleure, mesosternum, the middle of the api- 
cal half of the lst abdominal segment, the middle of the 2nd entirely and the 
others almost entirely, black ; fore legs testaceous, the tibia: and femora broadly 
black outwardly on the base ; the 4 hind legs black, the cox below the middle 
knees, and apical three-fourths of the hind femora rufo-testaceous ; the middle 
tarsi yellowish, the apices of the joi 1ts more rufous in colour. Face and clypeus 
densely covered with black, the pleur and legs with longer white pubescence, 
wings yellowish hyaline, a dark fuscous cloud enclosed by the transverse 
median, transverse basal, recurrent and discoidal nervures, it extending on the 
apical half of the transverse basal on to the costa, and the apex from the apex 
of the stigma fuscous, there being also an irregular fuscous cloud in the middle 
of the hind wings and a narrower one on the apex; the 2nd cubital cellule is 
distinctly narrowed in front, through the fore half of the 2nd cubital cellule 
converging towards the Ist. There is a large semi-circular area on the base of the 
metanotum with a longish triangular one in the centre ; following this are 3 
are, the central narrow, twice longer than wide, the outer square ; on the apical 
slope is, in the centre, a narrow triangular area, bordered by 2 squarish ones. 
The pleural furrows are stoutly crenulated. Metapleure sparsely, distinctly 
punctured, with some curved keels in the centre. Palpi pale testaceous. Female. 
Length : 10 m.m. 
Mesonotum trilobate, the middle lobe with a shallow furrow. 
Biroia ruficollis, sp.n. 
Black, the apical half of the propleure, forming a large triangle, 
pronotum, mesothorax with scutellum, the base of metanotum broadly 
irregularly and the greater part of the centre of metapleure, red; the 4 
anterior tarsi rufo-testaceous ; palpi black, covered with white pubescence 
wings fuscous violaceous, the stigma and nervures black, the areolet narrowed; 
