410 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
times the breadth. Genitalia prominent; the valves broad, rounded 
at apex; cerci long and slender. Wings large, extending almost to 
tip of gaster. Legs very long and slender. 
Body and legs shining. Antennae opaque, coarsely, densely 
punctured; sparsely pubescent, and having much very long, fine 
erect hairs, which on the apical joints are shorter and confined to the 
tips; pubescence of apical joint more dense than the rest. Thorax 
with long silky pubescence, most abundant on the pleurae, and very 
fine erect hairs sparsely distributed. Node without pubescence, but 
with abundant erect hairs. Gaster with a thin mat of silky pubes- 
cence, shorter and finer than that of the thorax; lateral and apical 
portions with fine erect hairs. 
Color rufous, the antennal scape and first five funicular joints 
fuscous. Wings slightly infuscated, veins and stigma reddish brown. 
Pile and pubescence yellowish white, except the long antennal hairs. 
which are black. 
Described from three examples, which were taken at lights in 
Independencia. This form which is probably the male of the variety 
D. mutica, the commoner form in this vicinity, is very much like a 
male thynnid in general habitus. The antennae bear unusually 
long hairs, which are abundant basally, but thin out and become 
shorter toward the apex. 
23. Neoponera (Neoponera) commutata (Roger). 
Porto Velho and Camp 39, Madeira-Mamoré R. R. 
24. Neoponera (Neoponera) apicalis (Latreille). 
Parad, Porto Velho, Abuné, and Camps 39, 41, Madeira-Mamoré 
R.uR. 
25. Neoponera (Neoponera) obscuricornis Emery. 
Abunda and Porto Velho. 8 
In general appearance this species is very similar to the preceding. 
It can be distinguished by the structure of the node. In N. apicalis 
this is sharply margined at the sides, and longitudinally impressed 
medially to the margin. Neoponera obscuricornis has the surface of 
the node slightly convex, not impressed; the margin is very feeble 
at the base and entirely obsolete on the apical half. 
