278 Mr. P. Cameron on 
Dimetha tibialis, sp. n. 
Lutea ; antennis, abdominis apice late apiceque tibiarum posticarum 
nigris ; alis flavo-hyalinis, apice violaceo-fumato. @. 
Long. 20 mm. 
Antenne black, the scape yellow except above. Head 
luteous, the face and eye-orbits of a paler yellow tint, smooth 
and shining, the face and clypeus with some scattered punc- 
tures. Mandibles luteous, the base broadly pale yellow. 
Mesonotum closely and minutely punctured, the middle slightly 
raised. Scutellum strongly and deeply punctured, the sides 
stoutly keeled to shortly beyond the middle; the apex with a 
gradually rounded slope. Postscutellum smooth and shining, 
the space at its sides stoutly longitudinally striated. The 
base of the median segment closely punctured and obliquely 
depressed; in the middle at the top of the depression is a 
smooth and shining space, from which run a smooth and 
shining keel along the sides and two diverging ones down 
the centre, which is irregularly transversely reticulated ; the 
sides are transversely striated. ‘The upper part of the pro- 
pleure is coarsely aciculated, the middle bears stout perpen- 
dicular keels, the apex stout longitudinal keels; the lower 
part is aciculated. Mesopleuree obscurely punctured above, 
the lower part closely rugose, running into stria behind. 
Metapleure closely rugosely punctured. Legs coloured like 
the body, with the apical third of the hinder tibia and the 
hinder tarsi (except the base of the hinder tarsi, which is 
obscure luteous) black. Wings yellowish hyaline, the apex 
from the apex of the areolet dark violaceous ; the stigma and 
nervures are yellow. Abdomen coloured like the thorax, 
except the apical three segments, which are black, and a 
black transverse line on the base of the second and third 
segments, the black on the second segment being produced 
backwards between the gastrocceli. The basal three segments 
are closely punctured; the apex of the petiole and the base 
of the second and third segments striated. Gastrocceli smooth, 
bordered with stout strize behind. 
FACYDES, gen. nov. 
Areolet five-angled, the nervures distinctly separated above ; 
the apex of the wings with a fuscous cloud; the transverse 
median nervure distinctly received in front of the basal. 
Antenne short, flattened, and compressed beyond the middle. 
Clypeus with a shallow curved incision on the apex; the 
labrum not projecting. Scutellum pyramidal, distinctly raised 
