204 Annals Entomological Society of America [Vol. V, 
without a stigmal thickening; costal vein extending beyond the radial 
cell for half its length. Hind wing with a single subcostal cell, and the 
same continuation of the costal vein. This costal projection and the 
costal vein in the anterior wing black, but otherwise the venation is 
pale fuscous. 
Described from one female collected by Mann and Baker on 
the Rio Madeira, Brazil, Camp 39, Madeira-Mamoré R. R. 
This species differs from O. fragilis Westw. the only other 
described member of the genus, by the absence of a median 
groove on the mesonotum and by the entirely black tibiz. The 
second discoidal cell is also much shorter than the form 
represented by Westwood’s plate. 
Family BRACONID2 
Subfamily HELORIMORPHIN © 
Helorimorpha brasiliensis sp. nov. 
Male. Length 4 mm. Entirely honey yellow, except the space 
between the ocelli, the entire antenne, (except the 16th and 17th joints 
which are rufous) the apical fourth of the hind tibize, the hind tarsi and 
the apical joint of the other tarsi which are black. Wings deeply 
infuscated, blackish; with black stigma and veins. Head twice as wide 
as thick antero-posteriorly, smooth except for fine punctulation on the 
face and clypeus and still finer on the head above. Eyes small, nearly 
circular, one half longer than the malar space. Front with a sharp 
median carina extending from the upper part of the face nearly to the 
ocelli; strongly excavated above the base of each antenna. Ocelli 
small, close together in a triangle, separated by only their own diameter. 
Maxillary palpi slender, pale testaceous; 5-jointed, with the basal joint 
very short. Antenne black, with the 16th and 17th joints distinctly 
rufous; scape nearly as long as the first flagellar joint and twice as long 
as the pedicel; third joint as long as the scape, swollen apically ; following 
joints becoming shorter and distinctly moniliform by the middle of the 
flagellum, where they are only half longer than thick; again toward the 
tip the joints become much more slender and lose their moniliform shape. 
Thorax pitted and reticulate as in other species of the genus, the meta- 
thorax deeply excavated medially on its posterior face. Abdomen 
slender, as long as the head and thorax; petiole curved near its apical 
third; very slender, but distinctly broadened toward tip both in dorsal 
and lateral view; spiracles at the posterior third; base not striated. 
Second segment covering all the remaining parts of the abdomen, 
smooth and highly polished; narrowly ovate; one third as broad as long 
and slightly higher than broad; much more strongly curved below than 
above. Legs formed as in the other species. Wings with the radius 
arising perpendicularly from the middle of the stigma, the latter nearly 
half as broad as long; second section of radius nearly half as long as the 
first and as long as the hyaline second transverse cubitus. Recurrent 
nervure joining the upper side of the second cubital cell in a straight 
