228 Annals Entomological Society of America [Vol. V, 
piceous with black stigma and veins. Stigma lanceolate, the radius 
arising at its posterior third; half as broad as the radial cell; second 
section of radius twice as long as the first. First section of cubitus 
sinuate, the recurrent nervure received distinctly before the tip of the 
first cubital cell; submedian cell considerably longer than the median; 
subdiscoidal nervure arising below the middle of the discoidal vein, 
although in position it les far forward, due to the upper section of the 
discoidal vein being nearly parallel to the axis of the wing. Hind wing 
with the radius and subdiscoidal vein well developed. 
Four specimens, showing practically no variation, from 
Abuna, Rio Madeira, Brazil. 
This is the first species of Jdzasta to be described from the 
neotropical region. 
EXPLANATION OF PLATE. 
Fig. 1. Ophiogastrella maculithorax sp. nov., wings. 
Fig. 2. Eucystomastax bicolor gen. et sp. nov., wings. 
Fig. 3. Jdiasta nigripennis sp. nov., wings. 
Fig. 4. Bracon crassitarsis sp. nov., fore tarsus. 
Fig. 5. Parabinarea manni gen. et sp. nov., hind leg. 
Fig. 6. Eucystomastax bicolor gen. et sp. nov., maxillary palpus. 
Fig. 7. Mesostenoideus crassus sp. nov., portion of fore wing. 
Fig. 8. Cryptus heathi sp. nov., portion of fore wing. 
Fig. 9. Ophionellus manni sp. nov., wings. 
Fig. 10. Megaplectes branneri sp. nov., maxillary palpus. 
Fig. 11. Bracon paraénsis sp. nov., wings. 
