266 SMITHSONIAN MISCELLANEOUS COLLECTIONS [voL. 48 
the antennz beneath are ferrugineous, but above they are fuscous; 
the tarsi are fuscous, but the base of the front pair is ferrugineous ; 
hinder part of the tegule pale brown; the wings hyaline and irides- 
cent, the nervures dark brown. Abdomen with the apical margins 
of the segments covered with fine white hairs, forming distinct 
fasciz laterally. 
Head densely covered with fine punctures, those on the mesonotum 
_ deeper and stronger, the pleuree with the punctures smaller and 
more scattered than on the mesonotum; on the yellow scutellum are 
a few, small, scattered punctures. The truncation of the metathorax 
is rather densely covered with pale hairs, the basal space with 
shallow furrows; one enclosing an oval space, truncate at the base 
in the middle, from the apex of which two others extend backwards 
to the sides; two others, but less distinct, are found on each side 
of the oval space diverging behind so that the whole appearance 
is radiated. The abdomen is smooth and shining, without any dis- 
tinguishable punctures. Both recurrent nervures are interstitial. 
Taken at Villa Encarnacion, November 7, 1904. 
Another specimen from the same place, taken December 20, 1904, 
has the mandibles, the labrum, the sides of the clypeus and a spot 
between the antennz not fuscous but ferrugineous, as described for 
the type which came from S. Paulo, Brazil. The legs, too, are 
not black but brown, except the base of the tibiz which are yellow. 
Notwithstanding these differences, I do not think they form two 
different species, but rather that the form with the brown or even 
fulvous legs belong to the second generation or to a variety of this 
species, especially as there are in two specimens some other differ- 
ences in the coloring. I give their full description pending larger 
and better series before deciding definitely as to whether these forms 
belong to one or to various species. 
6a. PROSOPIS GRACILLIMA var. PARANEWNSIS new variety 
Female——Length, 6 mm.; abdomen, 11%4 mm. wide; wing, 4% 
mm.; antenne, 2 mm. Black; the middle of the clypeus, the face 
on each side of it, the inner orbits of the eyes, the collar, the tubercles 
of the thorax, the tegulz in front and the scutellum are yellow; the 
mandibles, the labrum, the sides of the clypeus and the hind orbits 
to the middle of the eyes, are ferrugineous. Above the clypeus is a 
ferrugineous spot with yellow centre; the antennz are ferrugineous 
beneath, fuscous above; the hinder parts of the tegule and a small 
cuneate spot in front of the tubercles, are brown; the legs, except 
