NEW SPECIES OF THYNNIDÆ. 
115 
Australian species, though it is more strongly developed in the Ma¬ 
layan group allied to T. serriger Sharp. 
Thynnus conator sp. nov. 
J. Clypeus short, broadly truncate at the apex, without a carina 
and closely punctured. Head shining, nearly half as broad again as 
long, rounded at the posterior angles, with a large smooth depression 
on each side extending from the base of the antennæ to the eyes and 
almost reaching the posterior margin, the vertex covered with large seti- 
gerous punctures, the depressions separated from each other by an ele¬ 
vated longitudinal ridge the breadth of which is equal to half the length 
of the scape, the sides of the ridge raised into low carinæ on the inner 
side of which runs a shallow groove with a few setigerous punctures. 
Eyes oval, not quite reaching the base of the mandibles. Pronotum 
smooth and shining, with a few setigerous punctures on the anterior 
margin, broader than the head, nearly three times as broad as long, 
slightly narrowed posteriorly and widely emarginate both anteriorly and 
posteriorly. Scutellum short, smooth at the base, strongly punctured at 
the apex and with a tuft of long hairs. Median segment very short, 
sparsely punctured and abruptly sloped posteriorly. Abdomen smooth 
and shining with a few scattered punctures ; the first segment vertically 
truncate at the base, the dorsal surface indistinctly and irregularly 
transversely striated, strongly punctured and with a patch of long hairs 
on the middle, the apical margin strongly raised with a deep groove 
behind it. Second segment with about seven strong tranrverse carinæ 
including the raised apical margin, the three apical ones straight, the 
next three slightly arched. Pygidium transversely striated at the base, 
vertically truncate posteriorly, very narrow before the base of the 
truncation with a small concave depression on each side ; the surface 
of the truncation broadly oval, without an emargination at the apex, 
the dorsal plate rounded at the apex and very much shorter than the 
ventral plate. Fifth ventral segment very coarsely longitudinally striated. 
Black ; the depressions on the head, the pronotum, scutellum, first 
dorsal segment of the abdomen, a broad band near the middle of the 
second, third and fourth segments above and below, broadly interrupted 
on the fourth above, and a triangular spot at the apex of the first 
ventral segment yellow ; the head, except the depressions, the mandibles, 
except at the apex, scape, base of the flagellum and legs pale ferrugi¬ 
nous ; the apex of the flagellum fuscous. 
Length 14 mm. 
8* 
