90 Mr. W. C. Crawley on new and 
long as declivity, the angle joining them rounded. Node 
higher than epinotum and as high as base of gaster; from 
above somewhat wedge-shaped, twice as wide behind as in 
front ; in profile wider than high, highest posteriorly, where 
it is vertical ; convex in front. There is a considerable 
constriction between first and second segments of gaster. 
Mandibles with both large and small scattered punctures. 
Clypeus rough, with larger irregular punctures. Head with 
spaced small piligerous points; thorax with similar points, 
but more widely spaced ; declivity of epinotum smooth and 
shining. Node and gaster with a few points. 
Darwin, Northern Territory, Australia (G. Hill, no. 607), 
1/7/15. 
Type in the British Museum. 
Odontomachus ruficeps, Sm., race acutédens, For. 
3 (hitherto undescribed). Length 6°5 mm. 
Entirely castaneous ; funiculus brown-yellow ; wings 
iridescent, tinged with yellow ; nervures brown-yellow. 
A few hairs on the head, thorax, pedicel, and gaster ; 
whole body (including legs and antennz) covered with a thin 
pubescence. 
Eyes occupy more than # of the sides of head. Antenne 
similarly formed to hematoda, Ltr., and fully as long as 
whole body. The two surfaces of epinotum equal, the 
declivity feebly concave, the angle joining them rounded and 
low. Node conical, as in hematoda. Gaster long and 
curved, slightly constricted between first and second segments, 
Sculpture similar to that of Aematoda, but much fainter, 
and on the scutum the sculpture is transverse or, at least, 
diverging from the centre line, whereas in hematoda it is 
more or less longitudinal. ‘The epinotum is similarly sculp- 
tured to the scutum—i. ¢., quite superficially, not coarsely 
rugose as in hematoda. 
@ (hitherto undescribed). Length (excluding mandibles) 
10:0 mm.; length of mandibles 1°5 mm. 
Except for sexual differences is very similar to the § major. 
In the 8 minor (length 6°5 mm.), the spine on the node is 
almost straight, but in the 8 major, and especially in the ?, 
the spine has a decided backward bend. 
The pronotum is transversely striate, the strie encircling 
the sides and the central ones doubling back on themselves ; 
the scutum is longitudinally striate, also the seutellum, but 
much more finely than the scutum. Epinotum is more 
