The Hymenoptera of the Georgetown Musewm. 437 
on the sides of the base of the scutellum, a longer, narrower, curved line behind 
them and a narrower, longer, more curved one behind these, extending to the 
post-scutellum the tubercles and the basal third of the mandibles, bright 
lemon-yellow, the middle of the mandibles reddish ; the flagellum of antenne 
tufo-testaceous, darker coloured above. The apex of the femora, the tibie 
and tarsi lemon-yellow ; the 4 anterior tibiz darker coloured in front, the basal 
three-fourths of the hind broadly black on the inner and outer side. Ocelli 
in a wide triangle, the hinder separated fromeach other.by a slightly greater 
distance than they are from the anterior. Face and clypeus covered densely 
with silvery pubescence ; the latter in the middle of apex armed with 2 bluntly 
triangular teeth. Front closely finely punctured, a stout keel runs down from 
the ocelli to the antenn ; at the eyes, opposite the lower ocellus, is a longish 
pyriform area, the narrowed end below and touching the eyes: there is a 
crenulated furrow round the top and outer orbits, the lower part of the outer 
furrow hidden by the dense pubescence. Mesonotum closely punctured, the 
base of the scutellum sparsely punctured, the apical half irregularly striated ; 
the post-scutellum is more irregularly striated. Basal part of metanotum 
irregularly areolated ; the central is more than twice longer than it is wide 
at the base ; the lateral keel it receives shortly beyond the centre ; on either 
side of the base are 3 arex, the central being the larger and confluent with the 
inner at the apex ; there is a large oval fovea in the centre of the apical slope 
which is bordered on the outer side by a keel, inside of which are 4 keels, the 
upper short, the middle curved and united on the inner side, the lower straight, 
at the bottom isan area,twice w der than long. On the upper half of the base 
of the mesonotum are 5 short irregular keels ; the 2nd and 3rd of which unite 
at the apex, the whole of them projecting into the furrow ; on the upper apical 
part are 3 curved furrows ; on the lower two-thirds near the apex is a wide 
curved furrow, the apex curved i inwardly in the middle, the lower part bordered 
by a distinct keel behind. Pygidium strongly punctured almost the apical 
half is rufous, this is also the case with the lower part. Female. 
Length 6 m.m. 
Crabro curvicollis, sp. n. 
Black, the antennal scape, a broad, curved interrupted line on the apex of 
pronotum, 2 curved irregular lines on the scutellum commencing on the outer 
basal side and extending close to the middle at the apex, the lines at the junc- 
tion of the 2 curves being narrowed ; there are transverse lines, twice wider 
than long, on the 2nd to 5th abdominal segments; there is a narrow, wider 
line on the sides of the 6th ; the last segment is almost entirely rufous ; the sides 
ot the pygidium are broad and raised and unite in a sharp point at the apex ; 
the base is triangular and hollowed. Wings hyaline, the nervures and stigma 
blackish. The collar is broad, clearly separated, the outer angles Lluntly 
triangular ; in the centre behind at the junction of the yellow lines are 2 keels, 
there being at the apex of these a longer narrower transverse kee!. There are 
3 keels qown the middle of the mesonotum. There is a distinct semi-circular 
area on the base of the metanotum with a furrow at its base ; a stout keel down 
its middle, it commencing at the base of the furrow ; there are about 3 keels 
on either side of it ; the apical transverse keel is rounded on the inner side, 
