TO NEW GUINEA IN 1904 ann 1905. PART I. 229 
yellow border, a broad line on the sides of the apical half of 
the, metanotum, bordering the outerside, top and the upper 
innerside of the yellow marks, the mesosternum, a narrow 
line on the apex of the mesopleuræ, dilated near the top, a 
narrow line on the base of the metapleuræ, following obliquely 
the suture above, a broad band in the middle of the 2nd 
abdominal segment, the basal two-thirds of the 3'1 and the 
basal half of the 4; yellow are: a line round the apex of 
the clypeus, a large mark on the base of the clypeus, a nar- 
row line round the top and sides of the prothorax, a broad 
transverse mark on the scutellum, almost separated in the 
middle, 2 large marks on the post-scutellum, 2 longish oval 
marks, rounded on the outer, transverse on the innerside, a 
narrow line on the apex of the first and the apical fourth of 
the 224 abdominal segments, pale yellow. The legs are of a 
brighter ferruginous colour than the body. Wings fuscous, 
darker and violaceous along the fore margin and apex, yello- 
wish at the base; the apex of costa and stigma ferruginous. 9. 
Total length 15 m.m. 
Digoel.. 
Head and thorax opaque, somewhat alutaceous, not punc- 
tured except indistinctly on the upper part of the mesopleure. 
There is a narrow longitudinal furrow on the lower part of 
the front. Base of thorax above transverse, sharply keeled. 
Metanotum behind the post-sentellum slightly raised, margined, 
slightly converging below; on the centre of the apical third 
is a furrow, narrow at the base, widened below. Abdominal 
petiole two-thirds of the length of the 224 segment, the basal 
third narrow, the rest dilated; pyriform, the 29% segment 
longish, about one fourth longer than it is wide at the apex, 
the base with a distinct narrowed neck; the apical yellow 
band is of equal width throughout. 
Very similar in size, form and colouration to the common 
I. ferruginea; the latter may be known by the head and thorax 
