The Hymenoptera of the Georgetown Museum. 433 
than the others: it is greatly thickened and longer than the preceding 3 
united ; on the basal joint are 4 stout longish reddish spines. Wings hyaline, 
the stigma and nervures black ; the Ist and 2nd transverse cubital nervure 
are almost united in front, the 1st is straight and obliquely bent from below 
the middle, the 2nd is roundly curved ; the lst recurrent nervure is receieved 
very shortly before the middle ; the 2nd in the apical fourth ; the space between 
the two is as much as that between the Ist and the base of the cellule. Female. 
Length 11 m.m. 
The lateral angles of the median segment are bluntly roundec ; the incision 
becomes gradually widened below ; the part below it is broadly, roundly dilated, 
more widely so above than below. The last dorsal seyment has not a distinct 
area ; it has a smooth, shining line down the middle. Apex of labrum broadly 
rounded. The vertex at the sides of the ocelli sparsely, the front more 
strongly and closely punctured except at the sides below. Mesonotum smooth, 
the sides of the scutellum punctured, the centre smooth. but with indications 
of a fine striation ; the basal upper part of the metanotum closely strongly 
punctured, the apical slope smooth ; its centre bordered by a keel, and by a 
furrow inside the latter, neither reaching to the top. Seen laterally the apex 
of the metapleura from the incision forms a curved keel. The apical half of 
the antenne is thicker than the basal; the last jomt is brownish. 
In Handlirsch’s table (Sitz. d. Kais. Akad @. Wissen in Wien., xxviii, 502), 
this species runs to angula/a, Smith, from which it differs in many respects, 
Larra guiana, sp. 0. 
Black, the abdomen bright red; the wings fuscous violaceous, the stigma 
and nervures black ; the Ist abscissa of the radius tw’ce the length of the 2nd, 
which is one-third of the length of the 3rd ; the !st recurrent nervure is received 
at a slightly less distance from the Ist transverse cubital than it is from the 
2nd recurrent, which is received shortly but a'stinetly before the middle. 
Antennal scape thickly coverea below with silvery pubescence ; the 3rd jomt 
is not quite twice the length of the 4th, which is hardly so long as the 5th. 
Head covered with pale fulvous pubescence, sparsely so on the front, which 
has a large, deep oval fovea in the centre and a longer, narrower, curved one 
on either side ; a short distinctly defined furrow, about 4 times longer than 
wide, runs down from the ocellus, which is in a large, wider than long depres- 
sion ; there is a semi-circular depression on the vertex near the middle. Meta- 
notum finely closely granularly punctured, the apical half ot the basal region 
depressed, a keel, obscurely striated on either side, in the middle of the base ; 
the basal slope is transversely striated, more finely suv in the middle. Meso- 
pleure finely, closely punctured, the basa! vertical furrow and the longitudinal 
one distinct. Female. 
Length 17 m.m. 
The Ist transverse cubital nervure is straight, oblique, the 2nd is broadly 
roundly curved towards it. The calearia are black, as are also the tibial spines, 
the tarsul spines are for the greater part dark red. The nearest ally of this 
