TO NEW GUINEA IN 1904 AND 1905. PART 1. 233 
The apical part of the flagellum of antennæ is rufous, as 
is also the apex of the elypeus and of the mandibles. Clypeus 
long, more than twice longer than wide; the part below the 
eyes is as long as the part above. The furrow on the meta- 
notum is deeper and more distinctly defined than usual, than 
in, eg. I. nigrifrons; the 24 abdominal segment in the latter 
species is longer and is more distinctly narrowed at the base, 
the narrowed part, too, being longer. The clypeus is longer 
than usual, especially below the eyes. 
16* 
