The Hymenoptera of the Georgetown Musewm. 227 
towards the radius, the 2nd about one fourth of their length and not much 
more than half of the space bounded by the recurrent nervures. Base of 
thorax transverse. Apex of post-scutellum gradually roundly narrowed to a 
bluntly rounded point in the middle. Metanotum broadly rounded laterally ; 
Ist abdominal segment cup-shaped, very shortly pedunculated, a large 
longish oval furrow in the cente of the apex, clearly narrower than the 2nd 
which is as long as it is wide at the apex and has the base roundly narrowed, 
Female. Total length 14mm. 
Head and thorax closely punctured, the top of the head closely covered with 
short black hair, the thorax with a white pubescence and pile. Clypeus 
longer than wide, the upper half closely, strongly, the lower more weakly and 
sparsely, the apex with a shallow, rounded incision. Ocelli in a wide triangle, 
the hinder separated from each other by the same distance as they are from 
the eyes. Malar space obsolete. Apical 4 jomts of antennz rufous below. 
The puncturation on the front runs into longitudinal striz. 
Montezumia leptocera, sp. n. 
Black, almost the basal half of the antennal scape and the flagellum below 
rufo-testaceous ; the apical two-thirds or so of the mandibles piceous red, the 
triangular hollow at their base, a line on the sides of the clypeus from above 
the middle and a line on the eye incision commencing at the lower half, pallid 
yellow ; the knees—the apex of femora more broadly than the base of the 
tibiae rufous ; wings hyaline, the fore half broadly rufous ; the costa and stig- 
ma rufous, the nervures pallid testaceous ; the Ist abscissa of radius longer than 
the 3rd, but not so long as it and the 2nd united, the 2nd not one-fourth of 
the length of the latter, which is about half of the length of the space between 
the recurrent nervures. Ocelli in an equilateral triangle, the hinder separated 
from each other by the same distance they are from the eyes. Clypeus 
longer than wide, the apex transverse. Post-scutellum large, gradually 
narrowed to a bluntly rounded point. Metanotum bluntly rounded laterally, 
short, steep. 1st abdominal segment longish cup-shaped, with a short pedicle, 
the apex smooth in the middle, not furrowed. 2nd segment hardly one quarter 
longer than wide, not much narrowed at the base. Female. Length 17 mm. 
Front and vertex thickly covered with short, stiff black pubescence ; the 
vertex weakly, the front more strongly punctured and irregularly longitudi- 
nally striated. The pubescence on the mesonotum is shorter, sparser and. not 
of such a deep black ; on the pleure it is sparser and pale. The basal ventral 
segment is pallid yellow and strongly longitudinally striated. 
Eumenes lineatifrons sp. n. 
Rufous, the 5th and following joints of the antenne broadly above, except 
the apical, a line across the middle of the front extending into the outer edge 
of the eye incision, a broader one across the vertex enclosing the ocelli, the 
occiput except round the outer edges, the base of the mesonotum, the trans- 
verse part, produced into a narrower line, narrowed at the apex as long as i {is 
wide, scutellar depression, an irregular line, widened below, on the upper, 
apical half of the meopleure, the base of the metapleure more broadly and 
regularly, the base of Ist abdominal segment narrowly all round, a broad line 
