Its vicinity could be immediately ascertained, often before it was seen, by a very pleasant odour, like otto of roses, which it seems to emit continually, and which may probably be attractive to the small insects on which it feeds.

The other, Tricondyla aptera, is one of the most curious forms in the family of the Cicindelidae, and is almost exclusively confined to the Malay islands.

In shape it resembles a very large ant, more than an inch long, and of a purple black colour.

Like an ant also it is wingless, and is generally found ascending trees, passing around the trunks in a spiral direction when approached, to avoid capture, so that it requires a sudden run and active fingers to secure a specimen.

This species emits the usual fetid odour of the ground beetles.