118 
ROWLAND E. TURNER 
with a spine on each side at the apical angles ; the seventh dorsal 
segment produced into a flat plate, longitudinally striated and trunca¬ 
ted at the apex. Hypopygium transversely striated above, with a blunt 
spine on each side near the basal angles, thence produced with almost 
parallel sides and nearly as broad as long and subconical at the ex¬ 
treme apex at the base of the acute and slightly recurved apical spine. 
The groove between the two basal ventral segments is shallowly mar¬ 
ked and the whole ventral surface is covered, more densely on the 
sternum than on the abdomen, with cinereons pubescence. 
Black ; the mandibles (except at the apex), a large triangular mark 
on the centre of the clypeus, the anterior margin of the clypeus broadly, 
an oblique spot on each side between the antennæ, the margins of the 
eyes interrupted on the summit, the anterior margin of the pronotum 
broadly with a small black spot in the middle, an oblique curved band 
on the mesopleuræ narrowly connected with a large spot above the 
intermediate coxæ, a quadrate spot near the posterior margin of the 
mesonotum, the tegulæ and a curved line above them, a large spot on 
the centre of scutellum and a small one at each of its anterior angles, 
the postcutellum, a broadly T-shaped mark on the posterior slope of 
the median segment and a large spot on each side at its apical angles 
and a rather narrow transverse band on each side on dorsal abdominal 
segments 1—6 yellow; femora, tibiæ and tarsi dull ferruginous. Wings 
hyaline, tinted with dusky yellow, stigma fuscous, nervures black. 
Length 20 mm. 
Hab. Sattelberg, Huon Gulf, New-Guinea (Biró). 
Type in Hungarian National Museum. 
This is a species belonging to the Zaspilothynnus group, which 
has not hitherto been found beyond Australia. The strong flight of 
Thynnus of the typical dentatus group, its prevalence in the northern 
portion of Australia and its plentiful occurrence on the sandy sea 
shore will account for its wide distribution in the eastern islands of 
the Archipelago, to which many of the Australian groups do not seem 
to have penetrated. 
Thynnus lugubris Sm. 
Thynnus lugubris Sm. Proc. Linn. Soc. Zool. VII. p. 25. (1863) 
Ç . Clypeus transverse, deeply punctured and without a carina. 
Head half as broad again as long, slightly narrowed anteriorly and 
rounded at the posterior angles, the vertex smooth and shining, the 
front with a large, deep, concave area on each side, which is finely 
shagreened at the apex and broadly rounded and obscurely obliquely 
