Hymenopterenfauna von Paraguay. 209 
Hab. Catamarca, N. W. Argentina. (Purchased from H. RoLLer.) 
4 &2 and 1 2. Type in the British Museum. 
The male is near E. avida Turn. from Tucuman, but the 
elypeus is rather longer and the apical emargination and the con- 
cave space before it are much narrower. The seventh dorsal segment 
is also narrower. 
Elaphroptera obfuscata n. sp. 
2. Mandibles bidentate, the apical tooth long and acute, the 
inner tooth short and broadly truncated. Clypeus broad, with a 
very short spine close to the base, shallowly concave below the 
spine and broadly emarginate at the apex, the angles of the emar- 
gination produced into a short acute spine. Antennae inserted as 
near to each other as to the eyes, as long as the thorax and median 
segment combined, the apical joints rather feebly arcuate; the pro- 
minence between the antennae bilobed; a faint carina from the 
anterior ocellus to the base of the elypeus. Head broad, very broadly 
emareinate posteriorly, finely and very closely punctured, the clypeus 
smooth and shining. Pronotum narrower than the head, very 
shallowly punctured; mesonotum very closely punctured, with two 
loneitudinal sulei on each side. Scutellum raised and convex, with 
a depressed transversa row of punctures at the base, shining and 
sparsely punctured in the middle, very finely and closely punctured 
striate on the sides. Median segment rounded, broader at the base 
than long, closely punctured, with a shallow sulcus from the base 
to the middle and a deep longitudinal suleus on each side at the 
apex. Abdomen elongate, narrowed at the base, shallowly punctured; 
the basal segment twice as long as the breadth at the apex, with 
a deep sulcus from the base to the middle. Seventh dorsal segment 
deflexed and coarsely longitudinally rugose; the hypopygium very 
narrow, projecting slightly and rounded at the apex. 
Black; the mandibles (except at the apex), clypeus, the margins 
of the eyes broadly as hieh as the base of the antennae, narrowly 
continued on the inner margin almost to the summit, an oblique 
spot on each side above the base of the antennae, a narrow trans- 
verse line at the posterior angles of the head, a narrow line on 
each side on the anterior margin of the pronotum, a line on the 
middle of the postscutellum and a small spot on each side near the 
apical angles of segments 1—4 of the abdomen yellow. Legs black, 
the tarsi yellow, the tibiae fusco-ferruginous. Wings fusco-hyaline 
