HYMENOPTERA 
OF THE 
Dutch Expedition to New Guinea in 1904 and 1905. 
PART I: THYNNIDÆ, SCOLIIDÆ, POMPILIDÆ, SPHEGID/E 
AND VESPIDE. 
BY 
P. CAMERON. 
Thynnidæ. 
Thynnus albopilosellus sp. nov. 
Three-coloured ; the head, pleuræ, breast, metanotum and 
ventral surface of abdomen densely covered with long whitish 
pubescence ; the following parts are rufous: the vertex, upper 
part of front (the mark narrowed below), the upper part of 
occiput, a broad line on the base of upper part of pronotum, 
the mesonotum and scutellum, except narrowly on the sides 
and the basal 4 segments of the abdomen — the basal broadly, 
the red on the others becoming gradually narrower; the fol- 
lowing parts are whitish yellow: the clypeus, the lower part 
of the front in the middle, the inner orbits broadly from 
shortly below the ocelli, labrum, mandibles, except the teeth, 
the outer orbits, the basal slope of the pronotum, a narrow 
line on its apex, post-scutelium, metanotum, the basal slope 
of the abdomen, a quadrangular mark on the upper part of 
the 1° segment, broader than long and of equal width, a 
more irregular one on the sides of the 24, dilated laterally 
Tijdschr. v. Entom. XLIX. 15 
