434 Mr. W. C. Crawley on 
underneath with a small sharp tooth. Postpetiole broader 
than the petiole, and broader than long, broadest at its 
sharply marginate anterior two-thirds of the sides, narrow- 
_ing abruptly behind the marginate portion ; on the side is a 
long concavity similar to that in singularis. A deep con- 
striction between the postpetiole and first segment of gaster, 
which are approximately equal in breadth. Pygidium 
truncate. 
Mandibles closely and coarsely punctured. Head with a 
few shallow irregular punctures on the vertex and occiput ; 
petiole and postpetiole densely and finely punctured. First 
segment of gaster with a few piligerous points. In addition 
the whole body has a fine reticulate ground-sculpture. 
Scattered erect hairs on head, mandibles, legs, and an- 
tenn ; thorax almost bare except for a row along the . 
carina between the two divisions of the epinotum; petiole, 
postpetiole, and gaster covered with long stiff hairs, slightly 
lighter in colour than the body; a thin adherent pubescence 
on petiole and postpetiole. 
Darlington, W. Australia (Clark, no. 9). Small colony 
under stone. 
Type W. C. C. coll. 
Leptogenys (Lobopelta) neutralis, For. % ¢. 
? (hitherto undescribed). Length 7:0 mm. 
Larger and more robust than the %. Head as broad as 
long (longer than broad in %). Thorax similar to that of 
the %, but mesonotum longer; metanotum distinct; epi- 
notum shorter, forming a regular curve, the base shorter 
than the declivity (the reverse is the case in the %). Petiole 
different ; from above the node is shorter than broad, twice 
as wide behind as in front, the posterior border straight or 
feebly concave (in the % the node is longer than broad) ; in 
profile it is straight in front and behind, somewhat higher 
behind ; the posterior face plane. Mandibles similar, with 
a long apical tooth and three exceedingly small teeth along 
the masticatory border. Gaster very large, nearly half the 
leugth of the total body. 
Black, shining ; mandibles, articulations of antenna, end 
of scape and the whole funiculus, the tarsi, the articulations 
of the legs, and the apex of gaster castaneous. 
Mundaring Weir, W. Australia (Clark, nos. 13, 41). 
Type in W. C. C. coll. 
Rhytidoponera convexa, Mayr, race violacea, For., 
var. SUBUMBRATA, NOv. 
%. Entirely dark russet-brown, the gaster sometimes 
