The Hymenoptera of the Georgetown Museum. 223 
half or more of the 1st and 3rd tibie and the whole of the middle yellow on 
the outerside. Wings rufo-fulvous, deeper tinted in front, the stigma and 
nervures of a deeper rufo-fulvous tint. Clypeus not much wider than long, 
the apex with a shallow rounded incision. Thorax longer than wide, the 
apex of post-scutellum gradually obliquely narrowed to a point. Apex of 
metanotum almost transverse, the sides on the upper half bounded by a broad- 
ly rounded keel ; the apical slope from near the top closely roundly striated. 
Ist abdominal segment broadly rounded at the base, the 2nd wider than long, 
the apex ana the 3rd and 4th strongly punctured. Female. Total length 11mm. 
Head and thorax closely punctured, the head more closely and less strongly 
than the mesonotum, the latter less strongly than the scutellum. Sides of 
metanotum coarsely reticulated —punctured, as is also the apex of metapleu- 
re. Mesopleure strongly rugosely punctured. The pubescence is more 
silvery on the sides of the thorax than on the top. The legs incline to piceous 
in colour. 
What seems to be the male has the head, thorax and abdomen more coarse- 
iy punctured, the clypeus and labrum are entirley yellow and there is a yellow 
line on the lowerside of the eye incision, the basal line on the pronotum is 
interrupted in the middle, there is a small yellow spot on the sides of the 
scutellum at the base, the yellow line on the sides of the metanotum is less 
strongly dilated at the base, the line on Ist abdominal segment is wider and 
rounded at the base, distinctly narrowed laterally and the apex of the 2nd 
abdominal segment is more strongly punctured ana depressed. Clypeus 
large, a little longer than wide, the apex broad, transverse, the sides from 
the eyes obliquely narrowed. There is a short line between the antenne, 
which are coloured as in the Female. 
Odynerus trailiz, sp. n. 
Black, densely covered with pale golden pubescence, which is more silvery 
on the pleurie ; the underside of antennal scape, except at base, one opposite 
it, a line on the sides of the clypeus above reaching to the lower edge of the 
eyes, dilated inwardly on the top, a short oblique line on the inner side of 
malar space, a longish triangular spot on the base of mandibles, clypeal teeth, 
a line on the base of pronotum, a line of equal width on the base of post-scu- 
tellum, a curved line on the sides of metanotum above, the upper part straight, 
transverse, the outer longer, roundly curved downwards, reaching to the 
middle, a narrow obscure line on the apex of the Ist abdominal segments and 
broad lines on the 2nd to 5th, the whole of the 6th above and below, a narrower 
line on the apex of the 2na ventral, dilated triangularly on the outerside, a 
broader line, rounded at the base, on the 3rd and the whole of the 4th and 5th 
orange yellow. Tibic broadly yellow on the outer side, the colour on the 4th 
hinder rufous in tint, perhaps through discolouration. Wings fulvo-hyaline, 
the apex paler, slightly tinged with viclaceous, the nervures rufo-fulvous, the 
apical darker in tint, the stigma blackish. Clypeus as wide as long, the flat 
central part distinctly, but not very closely punctured, the apex with a shallow 
rounded incision, with stout lateral teeth. 1st abdominal segment short, 
