Hymenopterenfauna von Paraguay. 20 
99 
Elaphroptera rosenbergi n. sp. 
d. Ulypeus broad, with a small tubercle on each side close 
to the base, the anterior portion below the tubercles slighly con- 
cave, very broadly emarginate at the apex, the apical angles of the 
emargination produced into short stout spines. Mandibles bidentate, 
the outer tooth acute; the inner tooth much shorter, broad and truncate. 
Antennae inserted rather further from each other than from the 
eyes, shorter than the head and thorax combined, the apical joints 
strongly arcuate; the frontal prominence between the antennae very 
feebly bilobed. Head and thorax very closely and rather coarsely 
punctured; the head short and broad, the posterior margin almost 
straight. Scutellum separated from the mesonotum by a transverse 
depressed sulcus, rounded at the apex and strongly depressed poste- 
riorly to the postscutellum. Median segment punctured, rugulose, 
obliquely depressed, rounded at the sides, as long as the breadth 
at the base. Abdomen somewhat flattened, elongate, the sides al- 
most parallel, tapering slightly at the extremities, closely and rather 
finely punctured, the seventh dorsal segment rugose, deflexed and 
subtruncate at the apex; the hypopygium narrow and scarcely pro- 
jeeting beyond the dorsal segment. 
Black; the mandibles (except at the apex), the clypeus, inner 
margin of the eyes very broadly as high as the base of the an- 
tennae and more narrowly above, the cheeks, an oblique spot on 
each side above the base of the antennae and a rather narrow 
longitudinal band on each side of the abdomen from just before the 
apex of the first segment to the apex of the sixth yellow. Wings 
hyaline, tinged with yellow; nervures black, ferruginous at the base 
and on the costa. 
Length 23 mm, exp. 42 mm. 
9. Mandibles broad and strong, not bidentate, with a shallow 
groove at the base on the outer margin. Ülypeus broadly emar- 
ginate; antennae not longer than the head, the scape nearly half as 
long as the flagellum, with fulvous pubescence, longest at the apex 
beneath, on the scape. Head subrectangular, half as broad again 
as long, broadly and shallowly emarginate posteriorly, closely punc- 
tured; the front almost vertical, smooth and concave between the 
eyes and the base of the antennae, with a median, shallow, longi- 
tudinal sulcus and a few long hairs above the base of the antennae. 
Thorax, median segment and abdomen sparsely punctured, the pro- 
14* 
