NEW SPECIES OF THYNN1DÆ. 
119 
striated at the base ; the elevated space separating the concave spaces 
is narrow gradually broadening to the base, punctured and thinly clothed 
with long hairs, with a median carina and the sides raised forming 
lateral carinæ. In the allied species T. atratus from Halmaheira the 
concave areas are pointed at the base and the elevated ridge between 
them is much wider. Pronotum very coarsely punctured, the punctures 
more or less confluent, an obscure carina from the anterior margin to 
the middle, nearly twice as broad as long, the sides parallel, the ante¬ 
rior margin nearly straight. Scutellum sparsely punctured, broadly 
rounded posteriorly. Median segment minutely and closely punctured, 
obliquely truncate posteriorly, the dorsal surface very short, less than 
half of the length of the scutellum. Abdomen much broader than the 
thorax ; the first segment truncate anteriorly, the surface of the trun¬ 
cation concave and very finely punctured, the dorsal surface punctured 
and rather thickly clothed with long brown pubescence, the apical 
margin raised with a transverse groove before it ; second segment with 
ten or more transverse carinæ strongest at the apex ; segments 3—5 
shining with a few scattered punctures. Pygidium longitudinally striated 
at the base, truncated vertically posteriorly, sharply contracted before 
the base of the truncation, the surface of the truncation smooth, ovate, 
the hypopygium notched at the apex, the epipygium only reaching the 
middle of the truncation, trilobed at the apex, the middle lobe the 
longest. Ventral segments more coarsely punctured, smooth at the apex, 
the fifth segment longitudinally striated. 
Black; a band narrowly interrupted in the middle on the first and 
third dorsal segments of the abdomen and a small spot on each side 
of the second segment pale yellow: mandibles, antennæ, parts of the 
legs, pygidium and ventral surface fuscous. 
Length 14 mm. 
Hab. Ceram (C. Bibbe). 
Type of female in Hungarian National Museum. 
The pygidium is much shorter and broader than in T. atratus Sm. 
Thynnus serriger Sharp. 
Thynnus serriger Sharp in Willey’s Zool. Results pt. IV. p. 388. $ . 
cT. Clypeus pointed at the base and touching the apex of the 
interantennal prominence, obliquely depressed to the apex and finely 
longitudinally striated, with punctures between the striæ, the apical 
margin very broadly truncate with slightly prominent angles. Head 
shining, sparsely and finely punctured; the antennæ shorter than the 
